Inmarsat I-4 F2 EMEA

on2ron
Posts: 56
Joined: Thu Aug 06, 2020 4:14 pm

Inmarsat I-4 F2 EMEA

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Unread post by on2ron »

I just finished a permanent Inmarsat antenna made with an outer net patch antenna and a NooElec LNA which is connected to an Airspy (first edition) with a Bias-T feed. This contraption is partially mounted between some bushes so its quiet a stealthy installation. Reception is nice for such a simple construction with a 20 to 26 dB SNR on average depending on the clouds.

The Tecmanoid STD-C decoder is used to unravel the messages. This also detects alerts and plots them on a Google Earth map wich is showed into the software UI.

Here is a screenshot of both SDRconsole V3 and the STD-C decoder working together via a VAC audio port.

73' Ron
ON2RON
Attachments
Inmarsat TDM decoding.jpg

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