#downlink — Public Fediverse posts

Signal Structure of the Starlink Ku-Band Downlink (2023) [pdf]

https://radionavlab.ae.utexas.edu/wp-content/uploads/starlink_structure.pdf

Comments: https://news.ycombinator.com/item?id=49137320

#HackerNews #SignalStructure #Starlink #KuBand #Downlink #2023 #PDF #RadioNavigation #Technology

Why Earth observation data is getting stuck in orbit

https://fed.brid.gy/r/https://spacenews.com/why-earth-observation-data-is-getting-stuck-in-orbit/

#ArsTechnica:
"
US spy satellites built by SpaceX send signals in the “wrong direction”
"
"It seems US didn’t coordinate Starshield’s unusual spectrum use with other countries."

https://arstechnica.com/tech-policy/2025/11/us-spy-satellites-built-by-spacex-send-signals-in-the-wrong-direction/

14.11.2025

#downlink #ISED #ITU #NASA #NOAA #NRO #NTIA #Raumfahrt #satcom #Satelliten #Satellitenkommunikation #sattv #SpaceFlight #SpaceX #Starlink #Starshield #uplink #USA

#WinFuture:
"
Geheime SpaceX-Satelliten funken auf verbotenen Frequenzen
"
"Ein Netzwerk streng geheimer Satelliten des US-Raumfahrtunternehmens SpaceX sorgt derzeit für Unruhe unter Experten. Denn sie senden Signale auf Frequenzen, die sie in dieser Form eigentlich gar nicht nutzen dürfen."

https://winfuture.de/news,154354.html

20.10.2025

#downlink #ITU #NRO #Raumfahrt #satcom #Satelliten #Satellitenkommunikation #SpaceFlight #SpaceX #Starlink #Starshield #uplink #USA

#Classified satellite network is emitting a mysterious signal…
https://www.npr.org/2025/10/17/nx-s1-5575254/spacex-starshield-starlink-signal
"Use of those frequencies to #downlink data runs counter to standards set by the International Telecommunication Union, a United Nations agency that seeks to coordinate the use of radio #spectrum globally. #Starshield's unusual transmissions have the potential to interfere with other scientific & commercial satellites, warns Scott Tilley, an amateur #satellite tracker in Canada who first spotted the #signals."

If a #reticulum #meshchat instance with a #lxmf address on one computing device has 4 identical #lora #rnodes #rnode interfaces, each with same settings of frequency #spreadingfactor #sf, each rnode having a #directional #yagi #antenna in close vicinity, will transmission to a sender of a #deliveryconfirmation (#downlink) from 1 antenna to the sender's direction, be messed up due to local #collision at rnode 1 of different attempted #acknowledgement signals of the other 3 near rnodes?

Networking With Balloons - Starlink has been making tremendous progress towards providing world-wide access t... - https://hackaday.com/2023/06/26/networking-with-balloons/ #raspberrypi #radiohacks #downlink #balloon #network #images #packet #rf4463 #radio #stm32 #aprs

I haven't decoded this, a downlink from the INS-2TD satellite, but I am still thrilled you can capture beeps and boops from #space. #satellite #hamradio #satNOGS #downlink #fsk

Woohoo! Nice looking NOAA-19 downlink on my #SatNogs station the other day. Now, why did this one come out so well, when they usually do not? 🤔 #satellite #downlink #noaa #hamradio

Madrid Dish 55 taking the data sampler plate from Mars today.
#Mars #Downlink #TGO #MAVEN #Odysee

Swarm vs. Iridium: Which Satellite IoT Service is Right for You? - In a world where it seems like everyone’s face is glued to a device screen, the id... - https://hackaday.com/2022/08/12/swarm-vs-iridium-which-satellite-iot-service-is-right-for-you/ #techhacks #satellite #shoot-out #downlink #iridium #uplink #swarm #iot

Hackaday Links: July 3, 2022 - Looks like we might have been a bit premature in our dismissal last week of the Su... - https://hackaday.com/2022/07/03/hackaday-links-july-3-2022/ #hackadaycolumns #hackadaylinks #geomagnetic #solarcycle #solarstorm #makergear #downlink #starlink #sunspots #ku-band #crypto #nvidia #flare #amd #gpu #5g

Satellite Communications Hack Chat - Join us on Wednesday, June 2 at noon Pacific for the Satellite Comms Hack Chat wit... - https://hackaday.com/2021/06/01/satellite-communications-hack-chat/ #thehackadayprize #hackadaycolumns #satellite #downlink #hackchat #sdr

Eavesdropping on Satellites for Fun and Profit - Geosynchronous satellites, girdling the Earth from their perches 36,000 km above the equator, are ... - https://hackaday.com/2020/08/20/eavesdropping-on-satellites-for-fun-and-profit/ #eavesdroppings #geosynchronous #securityhacks #satellite #downlink #security #exploit #defcon #cons

A Hybrid Helical Antenna for the Es’hail-2 Geosynchronous Repeater - Amateur radio operators like to say that working a contact in space can be done with a simple hand... - https://hackaday.com/2020/08/04/a-hybrid-helical-antenna-for-the-eshail-2-geosynchronous-repeater/ #geosynchronous #amateurradio #radiohacks #satellite #downlink #eshail-2 #repeater #helical #qo-100 #uplink #ham #lnb

How Does Starlink Work Anyway? - No matter what you think of Elon Musk, it’s hard to deny that he takes the dictum “There’s no such... more: https://hackaday.com/2020/02/20/how-does-starlink-work-anyway/ #currentevents #phasedarray #featured #backhaul #downlink #starlink #latency #optical #spacex #space #laser #ka #ku

SatNOGS Update Hack Chat - Join us on Wednesday, October 30 at noon Pacific for the SatNOGS Update Hack Chat with Pierros Papad... more: https://hackaday.com/2019/10/28/satnogs-update-hack-chat/ #hackadaycolumns #groundstation #thehackchat #ephemeris #satellite #altitude #downlink #tracking #antenna #azimuth #network #satnogs