11 hours ago
Update #7 4m dish build. Just a quick look see! It's really taking shape and more fun now all the messy cutting and drilling is done.. #Ghz_bands #eme #hamradio https://t.co/aGn3UajP55
11 hours ago
16 ribs ready for the 4m dish. Lots more to do now the Aluminium has arrived. Outer and inner rings next.
#eme #Ghz_bands #hamradio https://t.co/I2ykN7rrbQ
11 hours ago
I thought i would add RA and DEC output to my DSN Tracker. What a rabbit hole. Soon was knee keep in LST and GST and Hour-Angle. Took way too long to get this going. But it's done (i hope).
Now am thinking sidereal tracking would be a nice addition too... https://t.co/22LhQXYQJB
11 hours ago
Nick James observing from Chelmsford, UK provided this GIF via Seesat-l of #Change5. Potentially interesting! I heard reports from EU radio observers of signal level variations earlier. Not 100% sure this is the payload and not the final rocket stage. https://t.co/XJYuQ3oJNJ https://t.co/ZiPPxfLTHm
14 hours ago
New blog post: A look at Chang'e 5 telemetry. Details, code and data for the Chang'e 5 frames that I've been tweeting about lately. Thanks to @usa_satcom and @uhf_satcom for providing the data and to @r2x0t for leading this decoding effort. https://t.co/0bRoP2bPe2 https://t.co/Ro9QEYRhaz
18 hours ago
CE5 X-Band downlink this evening, new tracking data from @coastal8049 working a treat, no tweaking needed of antenna position! https://t.co/owWjnHvfXv
Tag Archives: POR
Inmarsat Antenna Distribution
Inmarsat L-Band signals from both CONUS and POR need to be routed to various receivers and SDRs, this distribution system is a pretty simple solution (as shown below). It’s based on taking an L-Band signals from a dish, where pre-amplification … Continue reading
Aero Decoding and Full Support for HackRF One
After some work it is now possible to fully support HackRF One with my Inmarsat Aero decoder. In the past, the Inmarsat Aero decoder used two SDRs (each covering 2MHz) to cover up to 4MHz of L-Band spectrum as well … Continue reading
Adding External Reference to HackRF One SDR
The HackRF One SDR is a great value but it’s frequency stability leaves something to be desired. Using the Si5338 clock generator from Silicon Laboratories is an easy way to address the problem (if it’s really a problem for your … Continue reading
HackRF One and Decoders
I’m always looking for opportunities to reduce the costs associated with high quality decoding tasks. The HackRF One is intriguing because it’s not very expensive, has a wide band receiver (10MHz – 6GHz) and an SDR that is capable of … Continue reading
Aero Coverage of POR and CONUS
The diagram below illustrates the current Aero coverage that is possible here at USA-Satcom. As you can see there is quite a bit of IQ bandwidth to deal with and consequently at least two i7 hex core machines are needed … Continue reading
Operation Deep Freeze 2014
It’s that time of year again! Regular science crew transportation missions to and from Antarctica using US Air Force aircraft. Communications occur via Military Satcom in the Pacific Ocean Region. Below are a few recent satcom intercepts as well as … Continue reading
Aero Crypto Calls
Finally found an Aero H/H+ call that was encrypted. Supported crypto services on Aero are US-STU-III (Secure Telephone Unit), STE (Secure Terminal Equipment), FNBDT (Future Narrow Band Digital Terminal). Not clear which service this actually is but I suspect it’s … Continue reading
New Inmarsat Aero-H and H+ Decoder in Development
Another new decoder project is in the works. This is another Multi-Channel decoder for Aero but instead of just ACARS and CPDLC it does AMBE and LPC voice decode. The screenshot below shows call logging status output from the prototype … Continue reading
Inmarsat Aero-P ACARS Multi-Channel Decoder
Inmarsat Aero-P includes an ACARS service for airlines to use while transiting the various ocean regions. This is much more reliable than HF ACARS. Inmarsat hosts 3-4 Aero-P control channels on L-Band for each ocean region. Each control channel is … Continue reading
Inmarsat STD-C
Inmarsat STD-C is a data or message-based system used mostly by maritime operators. An Inmarsat C terminal transmits and received on L-Band to various geosynchronous satellites that service each major ocean region (POR, IOR, AOR-E, AOR-W). The information rate is … Continue reading