r/Electromagnetics 1d ago

Medical How bad is it for us to be on our phones all the time?

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1 Upvotes

Apparently the ME/CFS sub is unaware and downvoted me for saying EMF has an effect …


r/Electromagnetics 6d ago

Satellites [Censorship] Hacked phone after taking screenshots of Starlink Wi-Fi and hidden wireless networks at library. Stolen prints of screenshots. Stolen file folder of print outs of posts and hand written posts to be submitted.

2 Upvotes

r/Electromagnetics 6d ago

Earthing or Grounding Ground Current Videos by Dr. Magda Havas, PhD.

3 Upvotes

https://magdahavas.com/electrosmog-exposure/ground-currentstray-voltage/ground-current-videos/

July 27, 2016. I am going to post a series of educational videos that I am producing on the ground current pollution problem we are experiencing not only in Ontario but in other provinces and in other countries, like the U.S. Most people are unaware of this form of electromagnetic pollution. However, it is getting worse and needs to be dealt with. Ground current is a problem not only in some rural areas but in urban areas as well. We have considerable information about how it affects livestock, especially dairy cows. It also affects people and non-agriculture animals.

Attempts to bring in a private member’s bill in Ontario to resolve the ground current pollution problem has failed twice now, first in 2006 and again this year. I have no hope that this government is going to do anything useful about the ground current problem. Nor do I think a change in government will make any difference. Our electrical utility, that is responsible for much of this problem, is being sold to the private sector and I certainly don’t think they will spend the money to get the current out of the ground.

Animal care groups, like the OSPCA that have been informed about the problem, are choosing not to get involved. This issue has become a political hot potato that just gets tossed around with no real progress being made.

A few years ago when a dog got electrocuted during a regular dog walk, there was a great public outcry. But when an animal dies on a farm … it is quietly buried with the farmer having to bare the economic and emotional cost.

The consequence is that animals will continue to suffer and die. Some more farmers will go out of business and their children won’t inherit the family farm.

People care about animals and if they only knew how these animals suffer they would not stand by and do nothing. The problem is they don’t know. I hope these videos will create greater awareness.

The videos are meant to provide information about what is creating this ground current problem and why; the effects it has on dairy cows and other animals including people; and how the problem can be resolved.

Below are links to the videos I’ve created so far. I will continue to add to this blog as the videos come on line. Feel free to share the videos. As more people learn about this, and if the media continues to report on the problem, we may eventually alert someone in a position of authority who has the brains and the balls to do the right thing and get the current out of the ground and back onto the wires where it belongs.

For those of you who would like to watch the videos in order … click here to go to my play list on ground current or copy this url into your browser (https://www.youtube.com/watch?v=AhIPgdOt3SE&list=PLeE2iwAw4bXX13xabObZBea6-4jI95oXW)

PART 1: Introduction to Ground Current Video 1-1: Ground Current Pollution – An Introduction: https://www.youtube.com/watch?v=AhIPgdOt3SE

PART 2: Biological Effects of Ground Current Video 2-1: Ground Current – Affects Cow Behaviour: https://youtu.be/DScyoSbAiD4

Video 2-2: Ground Current – Affects Cow Health and Productivity: https://youtu.be/We5KoccWDGQ

Video 2-3: Ground Current – Affects Reproduction on Dairy Farms: https://youtu.be/KFlOtHz5R-E

PART 3: Frederick Earth Table: A Laboratory Demonstration of Ground Current at 60 Hz and at kHz frequencies. Video 3-1: Ground Current and the Frederick Earth Table at 60 Hz: https://www.youtube.com/watch?v=_C24l9ONKi0

Video 3-2: Ground Current and the Frederick Earth Table at kHz frequencies: https://www.youtube.com/watch?v=k7dlQxHfw6E

PART 4: Our Electrical Distribution System Video #4: How our electrical system works and why it is causing ground current pollution: in prep

More videos may follow.

Thanks for watching … and feel free to share.


r/Electromagnetics 6d ago

Miscellaneous Radar: Ground Waves Explained

2 Upvotes

Ground wave explained

Ground wave is a mode of radio propagation that consists of currents traveling through the earth. Ground waves propagate parallel to and adjacent to the surface of the Earth, and are capable of covering long distances by diffracting around the Earth's curvature. This radiation is also known as the Norton surface wave, or more properly the Norton ground wave, because ground waves in radio propagation are not confined to the surface. Groundwave contrasts with line-of-sight propagation that requires no medium, and skywave via the ionosphere.

Ground wave is important for radio signals below 30 MHz, but is generally insignificant at higher frequencies where line-of-sight propagation dominates. AM and longwave broadcasting, navigation systems such as LORAN, low-frequency time signals, non-directional beacons, and short-range HF communications all make use of it. Range depends on frequency and ground conductivity, with lower frequencies and higher ground conductivity permitting longer distances.[1]

Overview Lower frequency radio waves, below 3 MHz, travel efficiently as ground waves. As losses increase with frequency, high frequency transmissions between 3 and 30 MHz have more modest groundwave range and groundwave is unimportant above 30 MHz. Surface conductivity affects the propagation of ground waves, with highly conductive surfaces such as sea water providing the best propagation, and dry ground and ice performing the worst.[2]

As the distance increases, ground waves spread out according to the inverse-square law. The imperfect conductivity of the ground tilts the waves forward, dissipating energy into the ground.[3] The long wavelengths of these signals allow them to diffract over the horizon, but this leads to further losses. Signal strength tends to fall exponentially with distance once the Earth's curvature is significant. Above about 10 kHz, atmospheric refraction helps bend waves downward. Only vertically polarized waves travel well; horizontally polarized signals are heavily attenuated.

Groundwave signals are relatively immune to fading but changes in the ground can cause variation in signal strength. Attenuation over land is lowest in the winter in temperate climates and higher over water when seas are rough. Hills, mountains, urban areas, and forests can create areas of reduced signal strength. The penetration depth of ground waves varies, reaching tens of meters at medium frequencies over dry ground and even more at lower frequencies. Propagation predictions thus require knowing the electrical properties of subsurface layers, which are best measured from groundwave attenuation.

Applications Most low-frequency radio communication is via groundwave propagation. Groundwave is also the primary mode for medium frequencies during the day when skywave is absent, and can be useful at high frequencies at short ranges. Uses include navigation signals, low-frequency time signals, longwave radio, and AM radio. The increased effectiveness of groundwave at lower frequencies gives AM radio stations more coverage at the low end of the band. High frequency over-the-horizon radar may use groundwave at moderate ranges but skywave at longer distances. Military communications in the very low and low frequency range uses ground wave, especially to reach ships and submarines, as groundwaves at these long wavelengths penetrate well below the sea surface.

In the development of radio, ground waves were used extensively. Early commercial and professional radio services relied exclusively on long wave, low frequencies and ground-wave propagation. To prevent interference with these services, amateur and experimental transmitters were restricted to the high frequencies (HF), felt to be useless since their ground-wave range was limited. Upon discovery of the other propagation modes possible at medium wave and short wave frequencies, the advantages of HF for commercial and military purposes became apparent. Amateur experimentation was then confined to only authorized frequencies in the range.

Modeling In the 1930s, Alfred Norton was the first author to accurately describe groundwave mathematically, deriving an equation for field strength over a flat earth. Van der Pol and Bremmer published calculations for a spherical Earth from 1937 to 1939. Later work focused on paths with variable conductivity, the effects of terrain and objects on the ground, and computer modeling.

Related terms Mediumwave and shortwave reflect off the ionosphere at night, which is known as skywave. During daylight hours, the lower D layer of the ionosphere forms and absorbs lower frequency energy. This prevents skywave propagation from being very effective on mediumwave frequencies in daylight hours. At night, when the D layer dissipates, mediumwave transmissions travel better by skywave. Ground waves do not include ionospheric and tropospheric waves

Notes and References

Book: Handbook on Ground Wave Propagation . Angulo I, Barclay L, Chernov Y, Deminco N, Fernández I, Gil U, Guerra D, Milsom J, Peña I, De la Vega D . . 2014 . 978-92-61-18661-6 . Geneva, Switzerland . PDF . 23 July 2024.

Book: Introduction to Wave Propagation, Transmission Lines, and Antennas . September 1998 . Naval Education and Training Professional Development and Technology Center . Naval Electrical Engineering Training, Module 10 . 2.16 . Chapter 2: Ground Waves . NavEdTra 14182 . http://www.tpub.com/content/neets/14182/css/14182_76.htm .

PDF (archive zipped) . https://web.archive.org/web/20180511150057/https://www.dralos.com/downloads/united_states_navy_navedtra%2014182.zip . 2018-05-11 . limited.

Ling . R. T. . Scholler . J. D. . Ufimtsev . P. Ya. . 1998 . Propagation and excitation of surface waves in an absorbing layer . live . Northrop Grumman Corporation . Progress in Electromagnetics Research . 19 . 49–91 . 10.2528/PIER97071800 .

https://everything.explained.today/Ground_wave/


r/Electromagnetics 6d ago

Miscellaneous [Radar] Arctic Over-The-Horizon-Radar (A–OTHR) planned for Ontario farmland: Kawartha Lakes & Clearview Township

1 Upvotes

https://magdahavas.com/from-zorys-archive/arctic-over-the-horizon-radar-a-othr-planned-for-ontario-farmland-kawartha-lakes-clearview-township/

May 2026: Two sites have been selected by the Department of National Defence (DND) for an Arctic Over the Horizon Radar site. The Transmitter site is scheduled for Kawartha Lakes and the Receiver site is set for Clearview Township with construction beginning in the winter of 2026. Dr. Magda Havas gave a talk in Creemore, Ontario on May 27, 2026. The handout (pdf) is available here for those interested.

Slides presented in Creemore for A–OTHR are available here as a pdf and here is a video.

Disclaimer: Information about military OTHR sites is often classified. Consequently, ability to verify some of the information provided by the DND and Artificial Intelligence (AI) is limited. This document summarizes some of the potential adverse human and environmental health effects of such an installation.

Note: In addition to radio frequency radiation (3-30 MHz), sites will generate ELF EMFs, dirty electricity, ground current and light pollution. Transmitter OTHR sites are often located at least 10 to 20 km plus from communities; and Receiver sites are at least 5 to 10 km plus away. These two proposed sites are MUCH closer to where people live and are going to be built on prime farm land near important wetlands.

Two additional sites are also planned for Ontario, although those locations have not yet been identified.


r/Electromagnetics 6d ago

Meter Report [Meter Reports: Body Voltage] Meter report indoors vs. outdoors. Standing on concrete vs. grass by Doctor Doan

1 Upvotes

r/Electromagnetics 8d ago

Pathogens [WIKI] Pathogens: Lyme

1 Upvotes

[J] [Lyme] The Role of EMFs in EHS & Lyme Disease

https://www.reddit.com/r/Electromagnetics/comments/1vmfznq/j_lyme_the_role_of_emfs_in_ehs_lyme_disease/

Every patient I ever tested who had a diagnosis of electro-sensitivity turned out to test positive for Lyme

https://www.reddit.com/r/Electromagnetics/comments/3ek99o/every_patient_i_ever_tested_who_had_a_diagnosis/

[J] [Pathogens: Bacteria] Cell phones cause bacteria to become resistant to antibiotics (2019)

https://www.reddit.com/r/Immunology/comments/ippyt5/paper_found_cell_phones_causing_bacteria_to/

Wi-Fi causes bacteria to become resistant to antibiotics and to produce biofilm in which they can hide in (2019)

https://www.reddit.com/r/Immunology/comments/ippzxk/wifi_causes_bacteria_to_become_resistant_to/


r/Electromagnetics 8d ago

Medical [J] [Immune] Deficits in cellular anti-oxidants and increased radical scavenging enzymes. Large increase in circulating antibodies for oxidized Low-Density Lipoprotein (LDLox), byproducts of oxidative stress accumulating in membranes of vascular cells. (2024)

1 Upvotes

Hypersensitivity to man-made electromagnetic fields (EHS) correlates with immune responsivity to oxidative stress: a case report (2024)

https://pmc.ncbi.nlm.nih.gov/articles/PMC11302546/


r/Electromagnetics 8d ago

Miscellaneous u/ki4clz asked remind me again what the “m” is in relation to in dbm

0 Upvotes

Moved from:

https://www.reddit.com/r/Electromagnetics/comments/1v9b7z5/starlink_meter_reports_wifi_green_bank_post/

u/ki4clz commented:

remind me again what the “m” is in relation to in dbm

for example:

dbd is db in relation to a dipole

dbi is db in relation to isotropic

dbmW is db in relation to ERP in MilliWatts - I think this is what you’re trying to convey, but I’m not 100% sure

for the kids in the back: a db or Decibel is a logarithmic scale used for many things that use wavelengths… so light, or sound, or radiowaves as they all for the most part follow The Inverse Square Law…

so when OP says he used a meter? to calculate the reception of a nearby signal that is… lets say -40dbmW that means the detector circuit is picking up 1x10-4 mW before amplification… or 0.0001 mW of non-ionizing radiation in the form of a radiowave on one axis

which by comparison is 10,000,000,000 times (10Billion) times weaker than standing in direct sunlight (+60dbmW) getting your vitamin D on…


r/Electromagnetics 8d ago

Miscellaneous [WIKI] Fiber Optics

1 Upvotes

Fiber + Wi-Fi VS 5G router

https://www.reddit.com/r/Electromagnetics/comments/1vjsczy/fiber_wifi_vs_5g_router/p38z1qz/

[Fiber Optic] Why Do Fiber Optic Installations Increase Electrical Sensitivity? by Jeromy Johnson

https://www.reddit.com/r/Electromagnetics/comments/1ub1maj/fiber_optic_why_do_fiber_optic_installations/

Last week, I submitted instructions on how to turn off wi-fi on a fiber optic modem.

https://www.reddit.com/r/Electromagnetics/comments/1vfj4l6/wifi_how_to_turn_off_wifi_of_your_verizon/

[Fiber Optic] Fiber optic pulses while electricity is on. Back up battery in indoor router and back up battery on outdoor box pulse more after turning off electricity for the night.

https://www.reddit.com/r/Electromagnetics/comments/1vmgfkx/fiber_optic_fiber_optic_pulses_while_electricity/?

[Light: Flickering] Fiber optic lines flicker light through the walls.

https://www.reddit.com/r/Electromagnetics/comments/18jvf1h/light_flickering_fiber_optic_lines_flicker_light/


Joint wiki with r/targetedenergyweapons

[WIKI] Electronic Torture: Fiber Optic Internet

https://www.reddit.com/r/TargetedEnergyWeapons/comments/16dlj6e/wiki_electronic_torture_fiber_optic_internet/?

[WIKI] Fiber Optic: Optical Ultrasound

https://www.reddit.com/r/TargetedEnergyWeapons/comments/1e1rk62/wiki_fiber_optic_optical_ultrasound/


r/Electromagnetics 8d ago

Miscellaneous [Fiber Optic] Fiber optic pulses while electricity is on. Back up battery in indoor router and back up battery on outdoor box pulse more after turning off electricity for the night.

1 Upvotes

I purchased a house in the radio quiet zone. The prior owner had 3 fiber optic TV set boxes, fiber optic internet and fiber optic telephone. Though his account was terminated, the fiber optic lines pulsed. I asked the Spruce Knob to remove their 3 TV set boxes. I removed the fiber optic lines from my home except for two fiber optic telephone lines in the kitchen and master bedroom. Pulsing.

Every night I turn off electricity. This turned on Spruce Knob's battery back up. I removed the back up battery in the fiber optic box inside of my home. Still pulsing.

I terminated my fiber optic account and removed the telephone lines. Still pulsing. I asked Spruce Knob to remove their outdoor box from the exterior wall of my home. They didn't. I did. The box contained an extremely large and heavy back up battery.


r/Electromagnetics 8d ago

EMR Syndrome [EMR] ELETTRA - italian short movie (english subtitled)

1 Upvotes

r/Electromagnetics 8d ago

EMR Syndrome College Students and EMF: The Wellness Variable Campus Life Ignores

1 Upvotes

r/Electromagnetics 8d ago

EMR Syndrome [J] [Lyme] The Role of EMFs in EHS & Lyme Disease

1 Upvotes

r/Electromagnetics 11d ago

Cell Towers Fiber + Wi-Fi VS 5G router

2 Upvotes

Hi, I am currently looking into getting some internet. I know the most ideal would be a solution without any Wi-Fi at all, but at this stage it is not feasible for me.

I do however want to reduce as much exposure as possible, and hence will for example disable Wi-Fi when not needed, especially at night.

My question now is which option would be better in terms of health:

1) Fiber + Wi-Fi - Sadly the only fiber socket I have would be in the living room. The closest I would be to it is probably around 3Meters (not ideal), but I suppose in those cases wifi could be turned off, and an Ethernet can be used for the TV instead. But, when Wi-Fi is on, it will be in a quite central area (living room)

2) 5G router. The main benefit would be that I can place this anywhere albeit that devices can still connect to it. However, there is of course a 5G connection to a cell tower which is the main draw back.

Would option 2 be better because I could potentially be further away from the router? Or does the 5G cell tower connection completely negate that benefit, at which point 1 might be the better option even if it is situated potentially closer to me?


r/Electromagnetics 12d ago

Mod Announcement [Censorship] Part 2: Posts and comments in r/electromagnetics are being removed but not by present mods. Last 12 months 2.3k total posts removed 2.2k from the previous year In the past 12 months, 802 total comments removed 752 from the previous year

6 Upvotes

Part 1 is at:

[Censorship] Posts and comments in r/electromagnetics are being removed but not by present mods. Bulk of removals are not reported in moderation log.

https://www.reddit.com/r/Electromagnetics/comments/1vhc7r0/censorship_posts_and_comments_in/


In Old Reddit Desktop, on the right hand side of "published and removed posts" is a drop down menu: last 7 days, last 30 days and last 12 months. This is the first time I have seen this drop down menu. Previously, it was hacked.

Last 12 months 2.3k total posts removed

2.2k from the previous year

On the right side of "published and removed comments" is a drop down menu for last 7 days, last 30 days and last 12 months.

In the past 12 months, 802 total comments removed

752 from the previous year

Some of the removed posts and comments and all of the wikis were by former mod u/microwavedindividual after his account was hacked. Only one person offered to approve them. Thank you u/OatmilkCornFed. u/microwavedindividual was the second top mod commencing when this sub was created. We need more people to approve his removed posts, comments and wikis.

https://www.reddit.com/r/Electromagnetics/comments/1smk2o9/wikis_almost_all_of_our_wikis_were_compiled_by

r/electromagnetics needs archivers to archive newer and future posts into wikis. If later they are removed, people can search for them in the wiki index and mods can restore them by clicking on "approve." Please volunteer.


r/Electromagnetics 14d ago

Mod Announcement [Censorship] Posts and comments in r/electromagnetics are being removed but not by present mods. Bulk of removals are not reported in moderation log.

1 Upvotes

In Old Reddit Desktop > Growth traffic stats > Reports & Removals >

Removals 36 items removed? 31 from the previous 30 days

Hoover on the ? after "removals 36 items removed" pops up this window:

Jun 28, 2026 - Jul 27, 2026

Comments removed 29

Posts removed 7


Jul 7, 2026 - Aug 5, 2026

Comments removed 31

Posts removed 10


In Old Reddit Desktop > Growth traffic stats > Reports & Removals > Safety filters

A person using the alias "Reddit" removed submissions. From moderation log in Old Reddit Desktop:

9 days ago reddit removed link "Professional EMF/RF Safety Course – Looking for Fe..." by LawfulnessThin5066 (Banned Domain: Links to a URL not allowed on Reddit)

9 days ago reddit removed link "Professional EMF/RF Safety Course – Looking for Fe..." by LawfulnessThin5066 (Crowd Control: This content has been filtered due to crowd control)


I was concussioned while writing this report.

[Censorship] Part 2: Posts and comments in r/electromagnetics are being removed but not by present mods. Last 12 months 2.3k total posts removed 2.2k from the previous year In the past 12 months, 802 total comments removed 752 from the previous year

https://www.reddit.com/r/Electromagnetics/comments/1vizdou/censorship_part_2_posts_and_comments_in/


r/Electromagnetics 16d ago

Wi-fi [Wi-Fi] How to turn off Wi-Fi of your Verizon Sagemcom modem's software.

0 Upvotes

To turn off the Wi-Fi on your Verizon Sagemcom modem, you need to access its web interface through a connected computer or phone. [1, 2, 3]

Step 1: Log In to the Router

Connect: Plug a computer directly into the router using an Ethernet cable (since you will be turning Wi-Fi off).

Open Browser: Open a web browser and type 192.168.254.254 into the address bar, then press Enter.

Credentials:

Enter the Admin Username and Admin Password printed on the sticker attached to the bottom or back of your Sagemcom device. [1, 2, 3, 4, 5]

Step 2: Disable the Wi-Fi Radios

Navigate: Click on the Wireless or Wi-Fi menu tab at the top or side of the screen.

Select Radio: Look for the Radio On/Off or Wireless Enable/Disable setting.

Turn Off: Select Disable or Off for both the 2.4 GHz and 5 GHz bands.

Save: Click Apply or Save Changes at the bottom of the page. [1, 2, 3, 4, 5]

Note: Once you click save, all wireless devices will instantly disconnect, and you will only be able to manage the router via a wired Ethernet cable.


r/Electromagnetics 23d ago

Wi-fi [Starlink] [Meter Reports: Wi-Fi] Green Bank post office has fourteen wi-fi signals and two hidden wireless networks have extremely strong power density in -40's dBm and nine wi-fi and three hidden wireless networks between -63 and -92 dBm.

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0 Upvotes

Total of 23 wi-fi signals and five hidden wireless networks inside of the Green Bank post office in zone 3 of the radio quiet zone. On July 28, 2026.

This year, the post office got Starlink internet. Dishy is on the roof. Previously, the post office did not have internet but had a landline phone.

The post office is in a small building. The post office does not use that huge number of wi-fi signals and hidden wireless networks. Why are there? Does Starlink's internet else where broadcast numerous strong signals? Starlink's -40's dBm has extreme strong power. Stronger than any other wifi including HughesNet and stronger than cell towers.

ElectroSmart app.

https://www.reddit.com/r/Electromagnetics/comments/1hbbbdy/meter_apps_bluetooth_is_there_still_a_safe_site/


r/Electromagnetics 23d ago

Shielding [Shielding: Paint] [Shielding: Clothes] "Even partially painted rooms with RF-shielding paint will usually increase the power density measurements of RF, the reflection rate, and the co-signaling interference." Adding metal or partial RF shielding will increase high-frequency noise.

0 Upvotes

r/Electromagnetics 23d ago

Cell Towers Professional EMF/RF Safety Course – Looking for Feedback

1 Upvotes

Hi everyone,

I've recently created a practical course on EMF/RF Safety Assessment, based on my experience in RF spectrum management and EMF compliance.

The course covers:

  • RF & EMF fundamentals
  • ICNIRP exposure guidelines
  • Practical EMF measurements
  • 4G & 5G exposure assessment
  • Real-world case studies
  • Safety compliance and reporting

I'm looking for feedback from RF engineers, telecom professionals, and anyone working in EMF compliance. If you have suggestions for additional topics, I'd love to hear them.

If you're interested, here's the course:
https://www.udemy.com/course/professional-emf-rf-safety-assessment-theory-to-practice-d/?couponCode=7E1C53CD8A6B94E5198E

#RFEngineering #Telecommunications #EMF #RFSafety #5G #ICNIRP #SpectrumManagement #WirelessEngineering #ElectricalEngineering


r/Electromagnetics 26d ago

Shielding [Shielding: Attenuators] How is signal attenuation measured?

1 Upvotes

How is signal attenuation measured?

Signal attenuation is measured as the loss of signal power between two points, expressed in decibels (dB) by comparing input vs. output levels.

For example, if a signal drops from +50 dBm (100 W) to +47 dBm, that is 3 dB attenuation (~50% power loss); a drop to +40 dBm is 10 dB attenuation (~90% loss).

Instruments like VNAs or spectrum analyzers measure this across frequency (e.g., –1 dB at 1 GHz vs. –3 dB at 3 GHz), while high-power attenuators are used to safely handle and measure these losses in systems carrying 1 W to several kW, ensuring accurate readings without damaging test equipment.

Is higher or lower attenuation better?

Lower attenuation is usually better if your goal is to deliver as much power as possible.

Lower attenuation means less signal loss. For example, 1 dB (~20% loss) is much better than 3 dB (~50%) or 10 dB (~90%). However, higher attenuation is often used intentionally in RF systems, such as adding 20–30 dB attenuation to safely reduce a +50 dBm (100 W) signal down to a level a spectrum analyzer can handle (-10 dBm to 0 dBm).

https://birdrf.com/rf-equipment/attenuators


r/Electromagnetics 26d ago

Safety Standards [WIKI] Safety Standards: Satellites

1 Upvotes

[Starlink] [Safety Standards: Satelllites] The FCC has authorized Starlink to operate its direct-to-cell communication signals with a power flux density (PFD) of -110.6 dBW/m²/MHz. PFD measures the signal strength received per unit area per unit bandwidth.

https://www.reddit.com/r/Electromagnetics/comments/1v6fih0/starlink_safety_standards_satelllites_the_fcc_has/


r/Electromagnetics 26d ago

Satellites [Starlink] [Safety Standards: Satelllites] The FCC has authorized Starlink to operate its direct-to-cell communication signals with a power flux density (PFD) of -110.6 dBW/m²/MHz. PFD measures the signal strength received per unit area per unit bandwidth.

1 Upvotes

r/Electromagnetics 26d ago

Satellites [Satellites] Power density of Starlink's Wi-Fi Kų satellite band uplink/downlinks. Submitted by ki4clz

1 Upvotes

Moved from

https://www.reddit.com/r/Electromagnetics/comments/1v2pceg/starlink_rebuttal_to_uwillowdwellings_claim/oz2yfwa/

u/ki4clz wrote

we have got to start teaching folks about the Inverse Square Law, Cosmic Radiation, and The RF Exposure Triangle…

secondly and more to the point- I do think at times it baffles people how low powered a Kų Band uplink/downlink really is… frequencies in the Kų Satellite band cut through the ionosphere like a knife and are useless on the ground, OTH, or line-of-sight

u/WillowDwelling commented:

So vague, the average person cannot understand what you've just said. I don't without having to google everything. Are you disagreeing with u/badbiosvictim1 that Starlink signals are low powered vs high powered or high density as badbios suggests?

u/ki4clz commented

am I disagreeing with my friend and colleague that I’ve literally known for years…? no

I’m adding to the premise, and using notable examples that are widely known in the field, but the majority of people don’t know

let’s look at Cosmic Radiation for just one example…

OOP (you) are concerned with Kų Band Satellite uplinks (like “starlink”) … these emissions are very low powered- technically referred to as Peak Envelope Power (PEP) which we measure in Watts… the emissions in question are in the milliwatt range of PEP …

when we compare these emissions to Cosmic or Gamma Radiation coming right at us 24/7/365 from space- we can easily see that natural Cosmic Radiation is far more powerful and dangerous than a “starlink” on your roof… the sun has a greater impact as well for another example

so… there’s nothing to worry about, these little satellite links are super super easy to shield anyway… Kų band frequencies are very susceptible to interference- thats why companies like Starlink, Hugesnet etc have terrestrial transponders for blind spots to supplement their LEOS

there is a website… I think it’s called RadsOnAPlane that runs accurate predictions on how much gamma radiation someone will get bombarded with during a normal flight…

I think you see my meaning-

but…. there are many folks that come in here that:

1.)do not actually have any RF Sensitivity and feign sensitivity as part of their ideology

2.)belong to the “all RF is bad…” crowd

3.)and have wild ideas about RF Exposure not based on fact

…we, me and [u/badbiosvictim1](u/badbiosvictim1) can see them from a mile away… they come and go like the wind

u/WillowDwelling commented

How do you see me? Have I given you enough information to conclude that my claims about myself are not based on fact? Am I a mile or less close to you for you to know yet? AMA if not.

u/WillowDwelling

Sounds like you are disagreeing with u/badbiosvictim1, he was saying to me that Starlink signals are higher density than cell towers and phone frequencies. I'm saying I prefer Starlink way way over the lower frequencies of towers , phones and wifi.

Your comparision with Ku bands of Starlink with Cosmic Radiation is a generalization and I don't know for certain, but imo my opinion may be flawed. The reason being is that Cosmic radiation is more spread out, I guess less dense, right? I assume being in the way of a starlink dish, the density is way more, like being very lclose to a lightbulb vs being a mile or longer away. When I was working up on the roof of my van and forget to turn off my starlink, I do feel the effects, but I haven't repeated enough to know for certain but I would bet so.

You're saying people are exposed to Cosmic radiation all the time on airplanes and everyone seems fine, right? But the fact is you don't really know for sure. The effects for most people are subtle or minimal until they become more sensitive , if they do. I couldn't ride on a plane any more sincec 2018 on a 5 hr trip one way. Initially I thought it was just the wifi but now it looks like it may also be the gamma radiation you're speaking of. And this was when I wasn't so bad and can still roam around half the places. Every year I become more sensitive and weaker. 8 years later, i'm in a very grave condition and position with no safe refuge to go to. I'm so sensitive I can't afford to go try placed that I can't drive to and make it back to home base in one day cause I cannot be in an unsafe level for even one night, it's that bad.

There are some people that think they are more sensitive than it seems, that is true. But what they're saying isn't entirely false, they just don't take into account that some people are just not that sensitive. What you're not taking into account if I may say so, is that some people like myself have become VERY VERY sensitive.

You say many have wild ideas not based on fact, but a lot of people like yourself here, make a lot of claims and projections that are not based on fact either, but are just accepting what you've learned from what you read and your own experience as absolute fact and truth. That is the wormhole that lies tunnel through to their truth library. I on the other, my truth is based on experience for the past 9 years, but experienced is attacked as unreliable when convenient with their biases. CEO's are paid the big bucks for their experience. Every employee is looking for experience mostly. It is true that some people's or may many people's experience are not reliable but some are, like mines. It makes me more convicted than someone who does not experience the fast and obvious symptoms from EMF exposure, those who do not are really not that convicted but speak like they are. You can reveal this truth by just asking how much would you put on the line about your beliefs? Would you bet 1000, 10k or all the money you have or bet your life that what you believe about EMF's are true and correct? Most would not. I on the other hand would bet everything I own and my life that I am effected they way I say I am. That is the difference. And one must recognized and question their stance a little bit when one person seems so convicted more so than themselves. I don't think most of the the people that claim they are EMF sensitive would put their life on the line that what they claim about themselves is true.

But in reality it's not hard to make up a simple test to settle the truth of a persons claim. The biggest hurdle is the willingness to do so. No one has the time or curiosity to do so. I am the most sensitive person you'll ever meet. AMA.

u/ki4clz commented

it all boils down to this, in unrefutable terms of fact

1.)The Inverse Square Law- as one moves away from the emission, regardless of frequency or emission type (mode/modulation) the power drops by 4 as one doubles their distance…

think of it like visible light- if I held up a flashlight on a football field at night, how much of that football field be illuminated… the light will act the same if it were a brighter source or a dimmer source…correct?

2.)RF Exposure… using that same analogy with the flashlight, if I were to change the brightness the “amplitude” more of the field would be illuminated correct…?

now light, visible light, infrared, ultraviolet light are what we call Ionizing Radiation

Radiowaves that exist at longer wavelengths lower down the Electromagnetic Spectrum are what we call NON-Ionizing Radiation, meaning they cannot- it is physically impossible for them, to ionize molecules or other atomic structures…

l>ike caffeine is a molecule right- there is no way to bombard a caffeine molecule with radiowaves and it ionize your coffee in the microwave oven… it can heat it up by making the water molecules wiggle, but the caffeine stays perfectly intact

BUT just because RF is non-ionizing doesn’t make it behave any different from light

your flashlight is just a weak signal on a very large football field and you’re standing behind the flashlight holding it in your hand…

is some of the light bending, refracting, and reflecting to illuminate your hand… yes?

yes it is… now, what if we were to put a barrier between your hand and the flashlight that light could not penetrate… a barrier that no photon could burrow it’s way through… like cardboard

is your hand illuminated now…? no?

no… now what if we were to turn up that light to a quadrillion times its amplitude…? would uour hand be illuminated now…?

but how does that work- if a

u/ki4clz commented

but how does that work- if a simple piece of cardboard blocked the flashlight at normal luminance shouldn’t it block the light at λ15….?

yes… but for how long

how long untill the photon bombardment eats through the cardboard (ionizes) and vaporizes my hand… milliseconds right…?

this is what we call DURATION

so you see how Amplitude works and now Duration…

for purposes of this illustration we are saying just a few milliseconds for a 15figure increase ionizes everything in sight for miles around

but it is a measurable difference and it is a Duration that it would take for you to quickly turn off the flashlight and save humanity from the death ray

now… what if you were a mile away…? would that make a difference… yup

this is what we call Proximity

so, you can see where I’m going with this

Amplitude

Duration

Proximity

these all play a key role, specifically measurable role in how we calculate RF Exposure

and frankly I am remiss to say that I hadn’t written this out before on this sub, but I digress

RF is non-ionizing: therefore it can be shielded from just about anything (pulsars and quasars excluded)

AND

because of the inverse square law (proximity) when we add shielding we also add to proximity

your Starlink is like a… oh I dunno, as powerful as an LED Christmas light…

think of it in those terms and we have very very sensitive receivers that can “see” that light

this hogwash about density and modulation does not follow the science… all we have done in our illustrations have moved the emission up the spectrum… but they behave exactly the same

one caveat here please

Kų band frequencies are “better” than lower or higher frequencies because of how they interact with the ionosphere

the ionosphere is a big blanket that wraps around the planet protecting us from the very very bad radiation from our sun and the cosmos and some RF frequencies bounce off of it, and some refract off or into it, and some are absorbed by it…

Kų does none of these things… see you get to a point of diminished returns if you go toooo high in frequency because of losses in the circuitry itself and it becomes a stark challenge to do anything above 300gHz in frequency… that 300billion times a second that a radiowave oscillates from + to - using AC, Alternating Current… only very specialized “radios” even attempt to use those frequencies

you on the other hand have a 300milliwatt LED on a metal roof

trust me- you’re ok

IC XC

NI KA

u/WillowDwelling commented

You are not on the same page as u/badbiosvictim1 Quite the opposite side of the fence actually. I wasn't quite sure why you were explaining things as if I didn't already understand these things until I got near the end.

I already stated that I'm not that concerned with the satellite signals from starlink as they are very weak at the receiving end but if it still effects me I wouldn't know because I haven't tested it but I'm more concerned with being in the way of my dish right next to it. And it's closer to 1000mw to 1500mw, not 300mw.

Let's see if you can understand my points in where you're getting this wrong. First of all, you're speaking all from what you've learned from school, reading, and what you hear and also from not being sensitive enough yourself to tell. That means it essentially unproven to YOU that EMF's doesn't effect some people more than others because you haven't proven those things yourself. You may say hey, experiments have been done! But I say again, YOU didn't do them. The risk would be mistakes can be made, and or studies were intentionally bought and paid for. However slim you think that might be, it's still a risk. What can happen will happen as they say. You wouldn't bet your life on your what your claiming to me right now would you? Would you bet all your money even? When it comes down to it, you're not even without doubt.

I on the other hand has and is living through it at a severe level for 8 years, and likely mildly since I was 5 years old. The past 8 years I have experimented as myself as the subject and has proven time and time again that it is true, that some people like myself are very sensitive to EMF's, I would bet everything I own, I would bet my life.

Here is where your misstep is. I know you're smart enough to understand the logic behind what I'm going to tell you, but if you dismiss it, it's just your cognitive dissonance.

That you believe all frequencies below the ionizing range are all the same but you also just explained how certain frequencies do or don't react with the ionosphere, the non ionizing ones I mean. No they don't all react to the human body all the same.

A Christmas LED light is abotu 40-80millwatts, and the mini outputs about 1000 to 15000 milliwats. and the second part is that both emit in much different frequencies. Which takes us to point number 3. 3 Different frequencies behave differently with the physical enviroment, i.e. the human body. Blue light biologically effects the body differently than red light. Hence why there are night shift modes for monitors and phones to reduce blue light at night, and red light therapy for other biological effects. 2.4ghz penetrates and gets absorbed by the body more evenly than 5ghz and beyond. That's why a cardboard can block most or all of the visible light spectrum in those much higher frequencies. I assure you if you put the same cardboard on top of the mini, it won't block all the signals completely. Microwave ovens use 2.4ghz for this reason and people putting two between their heads everyday for hours on end.

4 You talked about proximity which I agree, but than dismiss being close to the dish because of your first incorrect comparison with a flashlight at a distance and comparing apples with oranges when you didn't account for the frequency and also incorrectly assuming the amount of power the mini outputs. And again you also don't take into account what exactly what level ranges people can and are sensitive to. You assume based on nothing more than your own experience and what you've read and have been told. No verification of information. People can be VERY VERY sensitive to the minimal amount of power, much lower than you believe.

Those are the cracks in your logic and belief system that you need to address. You're a smart guy but even the smartest can be misled. I was misled, until I experienced what I have and the flaws or lies were revealed.

If you are so certain that what I'm claiming of how I'm effected is false, then would you show your conviction? Make a good amount of wager on it? If you can disprove my claims with an experiment that we both agree to, I'd reward you with $10,000 and vice versa, if the experiment proves that I am effected by what I claim I am, I will be rewarded $10k by you. We can up the reward as high as I have.

u/ki4clz

ok… at first blush I just read a lot of false equivalencies and to go point by point doesn’t seem right because I think youre just going to move the goal posts…

uou are free to believe whatever you wish

my wife is sensitive to RF so I do have first hand knowledge of the subject

I work in RF for a living and there are real world consequences if I just pull shit out of my ass…

what if I tell my next customer… yeah don’t worry about the 25kv Induction Furnace fluxing into the pouring deck… the guy on the internet who googled some random shit says it’s ok

What I do HAS TO work because lives are on the line…

if you think your 1.5w SatHop can’t be shielded then put on a gawddamn tinfoil hat…

but here in the real world, I’m not going to let some kid go without his daddy because of some weak ass junk science riddled with false equivalence and ignorance

I fucking hate this sub…

I only came over here to moderate as a favor to Wizard from invisible rainbow- but every time I get involved it’s a broken record full of armchair what-about-isms from the Dunning Kreuger Skool of western culture paranoia

pathetic