Inmarsat (L Band) detection

1

Looking to detect Inmarsat transmissions (1575.42 MHz). Has anyone had any experience with this?

2

Just to detect, or are you wanting to perform some DOA analysis on them?

3

The initial priority is to detect, but ideally DOA. Thanks

4

Just like any RTL-SDR you could use an LNA + patch antenna. For DOA the spacing requirements might be too small for a typical patch sizing, so you’d need to design and build your own patch array.

5

Thanks Carl - appreciate the advice

6

Just a thinking, isnt that FQ GPS? Inmarsat uplink frequency band is 1626.5 - 1660.5 MHz and the downlink frequency band is 1525.0 - 1559.0 MHz. At least at that time i was working for PTS (Sweden,FCC) maybe changed?

7

yes - its those frequencies