Tag Archives: L-Band

Multi-Channel Inmarsat-B Decoder

Below is an graphical overview of Marine-B, an Ethernet based Multi-Channel Inmarsat-B decoder. Below is a more detailed block diagram of multi-channel decoder with a few screenshots of operational logging and FFT waveforms. Marine-B is a fully automatic frequency agile … Continue reading

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Protected: Inmarsat B Decoder

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Posted in Inmarsat Tagged

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

Posted in SATCOM Tagged

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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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

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First Weather Sonde of 2013 Recovered

Spring is nearing and so is the 2013 Sonde season. Landings are still in the dark so not too good for video or pictures but that will soon change. This is Sonde #4 (SN 7037645), it was launched from Oakland … Continue reading

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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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WX Sonde #3 Tracked and Recovered

This Sonde was supposed to be landing near Davis, CA, but that didn’t work out. Instead it traveled toward Sacramento and ultimately landed near the Sacramento International Airport (SMF). With just 50 minutes to landing (well after the balloon burst) … Continue reading

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