6 hours ago
Long plot of MRO @ Mars with R8600 + SDR-IP all locked to GPSDO. Need to still turn off the AGC - that is source of dB change in waterfall around 01:29 UTC. https://t.co/yMXBFPmSQX
9 hours ago
New S-Band filter to help with tracking satellites near horizon. @sysmocom cf2235-kt30 v1
Install is temporary until i have time to properly mount it. https://t.co/GMlCISqJ0W
10 hours ago
What's in a squiggle? This white line represents the GBT's observations of the NASA Mars Perseverance rover landing as we followed its tonal signal. Learn more https://t.co/lq3ZlxXbri https://t.co/l3m1qwbePe
10 hours ago
The Meteor Demodulator Plugin is now working on the latest SDR# Studio v.1810 in .NET 5.x!
Get the required files at: https://t.co/3XzauCtuCG https://t.co/vlniZAFY8v
11 hours ago
Casting my gaze on the C-band 3410MHz +/- 10MHz and I think I've found the Russian EKS system's TT&C beacons. Much more data and analysis required but there are multiple satellites with 12 hour periods in the data. https://t.co/tTnnQZjEWe
Tag Archives: L-Band
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
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
Multi-Channel Inmarsat-C Decoder
Below is graphical overview of Marine-C, an Ethernet based Multi-Channel Inmarsat-C decoder. The decoder is able to simultaneous decode up to 12 channels and therefore can cover an entire ocean region with this single application. The decoder monitors all LES … Continue reading
NOAA HRPT Weather Satellites
There are some nice wide HRPT signals coming from NOAA 15, 18 and 19 (others too, but these are the ones I looked at today). NOAA 15, 18 and 19 are LEO satellites and therefore require real time tracking. Since … 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
Inmarsat FAX
Inmarsat STD-B service is still active, even after all these years. On STD-B you will find voice, data and fax services Here are a couple of examples of recently received faxes via Inmarsat 3F3 Pacific Ocean Region (POR) at 178°. … Continue reading
Good Friday Sonde Hunt
Another great day for Sonde Recovery here in sunny California. The winds are good, the weather is nice and the sun is still up at landing time giving plenty of light. This Sonde was originally predicted to land near Rancho … Continue reading
