AMSAT-DL
@amsat-dl.org
AMSAT-Deutschland e.V. https://amsat-dl.org
charitable non-profit organisation, designing, building and operating hamradio #AMSAT satellites since 1973. Home of the Phase3 satellites and first Phase4A geostationary #QO100 S/X transponder
charitable non-profit organisation, designing, building and operating hamradio #AMSAT satellites since 1973. Home of the Phase3 satellites and first Phase4A geostationary #QO100 S/X transponder
Pinned
AMSAT-DL
@amsat-dl.org
· Feb 27
AMSAT-DL Deep Space
YouTube video by AMSAT-DL AMSAT Deutschland
www.youtube.com
live video stream from the 20m antenna 📡〰️〰️
AST SpaceMobile receives their re-approval for FM2. 430-440 MHz emergency TT&C operation only for periods not exceeding 24 hours.
January 5, 2026 at 7:47 PM
AST SpaceMobile receives their re-approval for FM2. 430-440 MHz emergency TT&C operation only for periods not exceeding 24 hours.
Reposted by AMSAT-DL
Probably the most ambitious video I've ever made as a person at a desk: a 2.5 hour dive into Apollo 13 using mostly voice recordings!
I had a ton of fun putting this together, and I hope you love going on board with the crew!
youtu.be/gQUHVYYHTb0
I had a ton of fun putting this together, and I hope you love going on board with the crew!
youtu.be/gQUHVYYHTb0
Failure Was Never an Option: the True Story of Apollo 13
There are many ways to tell this story, many lenses through which to narrate, and so many details that I couldn't fit in even at this length. This is by no means exhaustive. I just hope it brings you…
youtu.be
January 3, 2026 at 5:08 PM
Probably the most ambitious video I've ever made as a person at a desk: a 2.5 hour dive into Apollo 13 using mostly voice recordings!
I had a ton of fun putting this together, and I hope you love going on board with the crew!
youtu.be/gQUHVYYHTb0
I had a ton of fun putting this together, and I hope you love going on board with the crew!
youtu.be/gQUHVYYHTb0
Reposted by AMSAT-DL
My annual report, Space Activities in 2025, is now available at planet4589.org/space/papers...
planet4589.org
January 1, 2026 at 11:59 PM
My annual report, Space Activities in 2025, is now available at planet4589.org/space/papers...
Signal just turned OFF at 13:10:30 UTC..
December 31, 2025 at 1:37 PM
Signal just turned OFF at 13:10:30 UTC..
Chang'e-3 lander on the Moon just turned on again 📡〰️calling home and in command lock with groundstation! Sun's elevation at Chang'e-3 landing site in Mare Imbrium is 20°. Landing date was 14th December 2013. #HNY2026
December 31, 2025 at 1:28 PM
Chang'e-3 lander on the Moon just turned on again 📡〰️calling home and in command lock with groundstation! Sun's elevation at Chang'e-3 landing site in Mare Imbrium is 20°. Landing date was 14th December 2013. #HNY2026
TLE and more:
community.libre.space/t/lvm3-m6-bl...
community.libre.space/t/lvm3-m6-bl...
Lvm3-m6 - bluebird block-2 - 2025-12-24 03:24 utc
A small fix on the previous TLE at separation time based on a small change on the position of the rocket at the separation time: Bluebird 06 1 98451U 25358.15347222 .00000000 00000-0 5000...
community.libre.space
December 24, 2025 at 4:27 AM
TLE and more:
community.libre.space/t/lvm3-m6-bl...
community.libre.space/t/lvm3-m6-bl...
BlueBird 6, built by Texas company AST SpaceMobile, will lift off atop an LVM3 rocket from India's Satish Dhawan Space Centre tonight at 03:34 GMT.
AST on 430-440 MHz band used by amateur radio operators: We have agreed to only use this frequency band during emergency situations when other bands are unavailable. Should any operation cause harmful interference, our satellites can immediately cease transmissions.
ast-science.com/2025/09/09/c...
ast-science.com/2025/09/09/c...
Connecting the World While Protecting the Skies - AST SpaceMobile
The telecommunications industry is undergoing a major and consequential yet not widely understood transformation, and it is one I believe will ultimately benefit the 1.6 billion people on Earth withou...
ast-science.com
December 23, 2025 at 8:40 PM
BlueBird 6, built by Texas company AST SpaceMobile, will lift off atop an LVM3 rocket from India's Satish Dhawan Space Centre tonight at 03:34 GMT.
Reposted by AMSAT-DL
Fantastic thread!
Reber lived in Tasmania in the later part of his life, and passed away here. There’s even a museum dedicated to him down there!
He was of such importance and pivotal to #RadioAstronomy that his ashes were sent to radio telescopes all around the world! 📡
Reber lived in Tasmania in the later part of his life, and passed away here. There’s even a museum dedicated to him down there!
He was of such importance and pivotal to #RadioAstronomy that his ashes were sent to radio telescopes all around the world! 📡
December 22, 2025 at 7:45 PM
Fantastic thread!
Reber lived in Tasmania in the later part of his life, and passed away here. There’s even a museum dedicated to him down there!
He was of such importance and pivotal to #RadioAstronomy that his ashes were sent to radio telescopes all around the world! 📡
Reber lived in Tasmania in the later part of his life, and passed away here. There’s even a museum dedicated to him down there!
He was of such importance and pivotal to #RadioAstronomy that his ashes were sent to radio telescopes all around the world! 📡
So, they might have seen those harmonics from MRO as well as they have not received telemetry from Maven since December 4th and it might well be that Maven is still in its nominal orbit, but having some sort of electrical power outage. Hopefully they will be able to "reboot" Maven soon.
December 18, 2025 at 10:26 PM
So, they might have seen those harmonics from MRO as well as they have not received telemetry from Maven since December 4th and it might well be that Maven is still in its nominal orbit, but having some sort of electrical power outage. Hopefully they will be able to "reboot" Maven soon.
Analysis of that signal suggests that the MAVEN spacecraft was rotating in an unexpected manner when it emerged from behind Mars. Further, the frequency of the tracking signal suggests MAVEN’s orbit trajectory may have changed”.
December 18, 2025 at 10:26 PM
Analysis of that signal suggests that the MAVEN spacecraft was rotating in an unexpected manner when it emerged from behind Mars. Further, the frequency of the tracking signal suggests MAVEN’s orbit trajectory may have changed”.
On December 15th NASA wrote in the Maven blog: “Although no spacecraft telemetry has been received since Dec. 4, the team recovered a brief fragment of tracking data from Dec. 6 as part of an ongoing radio science campaign.
December 18, 2025 at 10:26 PM
On December 15th NASA wrote in the Maven blog: “Although no spacecraft telemetry has been received since Dec. 4, the team recovered a brief fragment of tracking data from Dec. 6 as part of an ongoing radio science campaign.
What was thought to be “Maven” is in fact MRO. Proof test by off-pointing our 20m antenna from Mars, but also acid tested when MRO disappeared behind Mars (LOS) – same effect.
December 18, 2025 at 10:26 PM
What was thought to be “Maven” is in fact MRO. Proof test by off-pointing our 20m antenna from Mars, but also acid tested when MRO disappeared behind Mars (LOS) – same effect.
UPDATE: #MRO and #MAVEN downlink frequencies are 6 MHz apart, so they should normally not interfere with each other. However, the events we saw yesterday and today as of timings and frequency doppler agree with Horizons/MRO exactly. In the attached screenshots we can see “spurious” and “harmonics”.
December 18, 2025 at 10:26 PM
Yes, you can contact us via office@amsat-dl.org
AMSAT-Deutschland
International Satellites for Communication, Science and Education
amsat-dl.org
December 17, 2025 at 10:00 PM
Yes, you can contact us via office@amsat-dl.org
..the team recovered a brief fragment of tracking data from Dec. 6 [..] Analysis of that signal suggests that the MAVEN spacecraft was rotating in an unexpected manner when it emerged from behind Mars. Further, the frequency of the tracking signal suggests MAVEN’s orbit trajectory may have changed.
December 17, 2025 at 9:34 PM
..the team recovered a brief fragment of tracking data from Dec. 6 [..] Analysis of that signal suggests that the MAVEN spacecraft was rotating in an unexpected manner when it emerged from behind Mars. Further, the frequency of the tracking signal suggests MAVEN’s orbit trajectory may have changed.
Reading the blog entry again, I tend to believe we may not be the only one faling into the same trap: science.nasa.gov/blogs/maven/...
NASA Continues MAVEN Spacecraft Recontact Efforts - NASA Science
NASA’s MAVEN (Mars Atmosphere and Volatile EvolutioN) mission team, in partnership with the agency’s Deep Space Network, continues recovery activities after
science.nasa.gov
December 17, 2025 at 9:34 PM
Reading the blog entry again, I tend to believe we may not be the only one faling into the same trap: science.nasa.gov/blogs/maven/...
Yes, you are right.. MRO is in a ~250 km to ~320 km orbit around Mars, which results in the same orbital period we observed. Will check both again tomorrow, so maybe we received some harmonic frequencies.
December 17, 2025 at 8:25 PM
Yes, you are right.. MRO is in a ~250 km to ~320 km orbit around Mars, which results in the same orbital period we observed. Will check both again tomorrow, so maybe we received some harmonic frequencies.
Each Orbiter does have different frequencies.
December 17, 2025 at 7:36 PM
Each Orbiter does have different frequencies.
Our own preliminary doppler profile shows that Maven's orbit period is now 1h52m instead of 3h30m. That would be a huge discrepancy. 112 minutes period gives SMA of 3659km. Something odd is going on...
December 17, 2025 at 3:19 PM
Our own preliminary doppler profile shows that Maven's orbit period is now 1h52m instead of 3h30m. That would be a huge discrepancy. 112 minutes period gives SMA of 3659km. Something odd is going on...
Also visible is the doppler on the carrier frequency, which will allow NASA engineers within a couple of orbits to determine the orbit properties. Fingers crossed, that they will able to fully recover the spacecraft soon.
December 17, 2025 at 12:40 PM
Also visible is the doppler on the carrier frequency, which will allow NASA engineers within a couple of orbits to determine the orbit properties. Fingers crossed, that they will able to fully recover the spacecraft soon.
#MAVEN is still alive and transmitting on the low gain antenna! 📡〰️🛰️ Signal is weak on our 20m dish in Bochum, but Maven is currently in command lock with DSN in Madrid. Here a screenshot when it came out from periareion (periapsis) behind Mars.
December 17, 2025 at 12:40 PM
#MAVEN is still alive and transmitting on the low gain antenna! 📡〰️🛰️ Signal is weak on our 20m dish in Bochum, but Maven is currently in command lock with DSN in Madrid. Here a screenshot when it came out from periareion (periapsis) behind Mars.