Tag Archives: POR

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

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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

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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

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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

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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

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Operation Deep Freeze Medivac

Operation Deep Freeze coordinating a Medivac with ICE 38. POR 263.6250 on 02-16-13: POR 263.6250 on 02-17-13: Tweet

Posted in SATCOM Tagged

Operation Deep Freeze Activity Ramps Up

Operation Deep Freeze became really active as of today (10.13.12). In the recording below you can hear ICE 10, ICE 11, Deep Freeze Ops, Mac Center and Charleston Roth. Discussion of various weather situations, Iridium texts, Microwave Landing System (MLS) … Continue reading

Posted in SATCOM Tagged

L-Band Downconverter for Inmarsat Operation

USA-Satcom has a shortage of communication receivers due to all the interesting things to monitor. In an effort to free up one of the communication receivers used for Inmarsat monitoring, a new L-Band downconverter has been designed and installed. Click … Continue reading

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L-Band Feed Optimization and Weatherproofing

The ground mounted 1.2m dish is currently dedicated to Inmarsat 3F3 POR at 178E. Winter is coming and so it was time to weatherproof and paint the 5-turn helical feed. The feed was also phase center optimized during dish calibration. … Continue reading

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Operation Deep Freeze

Operation Deep Freeze seems to be active again. These recordings are from end of August but I am just getting around to posting them. From the recordings it sounds like they are just getting Satcom setup and are doing some … Continue reading

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