6 hours ago
Nice propagation on 17m this fine snowy morning. Now i just need a nice fire in the radio room (you know the one with logs, not the amplifier). https://t.co/1qHo4fMWEZ
6 hours ago
Metop-A 's high elevation west pass...switching on late as usual....🛰️ https://t.co/m0TBOk9r2E
6 hours ago
We don't get snow too often (maybe once every 10 years) here at 600 feet. https://t.co/lhb0O4gpnC
Author Archives: trango
XM-1 S-Band Signal
Need to check dish alignment on S-Band? The 12.5MHz XM-1 signal is a great test signal. XM-1 is a much more interesting signal to look at than Sirius. The signal below is using a 1.8m dish.
Chang’e 5-T1 and new 1.8m dish online
New spacecraft and new dish were tested this weekend. The spacecraft is the Chinese Chang’e 5-T1, an experimental unmanned lunar mission that was recently launched by the CNSA. The dish is a 1.8m Prodelin offset and is inverted for ease … Continue reading
Posted in Projects, Spacecraft
Tagged S-Band
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-I 600 Baud GMSK
Currently there are 9 AERO-I 600 Baud GMSK channels on POR. Quite a bit of ACARS and CPDLC traffic along with the usual Call Management signaling units. These signals are huge as you can see from the “tightness” of the … 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
Fleet Tracking on Inmarsat 4F3
Most of the popular Inmarsat activity is associated with ships and planes in AOR-E, AOR-W, POR and IOR. There is an Inmarsat satellite called 4F3 parked at 98W that gives CONUS coverage. This satellite is inclined and so does move … Continue reading
