21 hours ago
Good morning from GK-2A! Received at 2320UT this morning, 2.5m dish, cantenna feed, 40dB LNAs, Nooelec extended range SDR, Xrit decoder by USA-Satcom. No typhoons or cyclones! https://t.co/KsAA6njLxo
4 days ago
MN2-2 afternoon pass. 4998 lines. With optimized tracking now. I really like that plot. Tracked and decoded with #ultratrack and #xhrpt from @usa_satcom https://t.co/xuIDJW5vIc
4 days ago
This is about the best view of the eye of Typhoon Hagibis I can squeeze out of the data I have from Himawaricast. https://t.co/HxuuuU1f75
4 days ago
#Operations image of the week
The 32-metre @goonhillyorg antenna reflects on its upcoming mission: communicating with 🛰️ across deep space
Got a question about #groundstations?
Join our Q&A today at 11.25UTC, LIVE from @newscilive
📸Nathanial Bradford
More: https://t.co/jtDhmdxnM2 https://t.co/rQ4nH8DPfq
5 days ago
Gorgeous view of Typhoon #Hagabis from #Himawari - classic cloud cliff in the front left quadrant https://t.co/wAax8QusGQ
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
