I've been monitoring the Pacific Inmarsat at 178 east on 1541.450 MHz. This is the only channel that has traffic in the clear. It consists of distress messages, weather, and other traffic of interest to merchant shipping. There is an Atlantic satellite, but, since I can't see it from my QTH I didn't save and info about it.
Here are a couple of IQ files. I was using an AirSpy decimated by 64 with sample rate set to 2.5 MSPS. The antenna was a 10 turn homebrew helix (now rebuilt to 20 turns): https://www.dropbox.com/sh/9kjdjltwr9emtad/AABvQNzUPMNOwzsr-Spoc_Fba?dl=0
Occasionally I upload the messages I've received a web page: http://www.ocrg.org/inmarsat/inmarsat.html (not much happening today!)
73, Ken, W7KKE
-----Original Message----- From: Scott Sent: Saturday, December 5, 2015 14:12 To: [email protected] Subject: [amsat-bb] Inmarsat L-Band Sample IQ File?
I sure hope this isn't too far off-topic, but I would imagine that a lot of Amsat people enjoy other satellite activities as well.
I've searched but have not found any sample IQ .wav files of L-Band InmarSat data streams. It sure would be helpful to know what I'm looking for when I scan around the 1.5 GHz area.
I'm also quite anxious to test the new JAERO software but of course you need a signal (live or recorded) to see anything decoded.
If anyone has a URL for sample Inmarsat files, I sure would appreciate it.
Thanks!
-Scott, K4KDR Montpelier, VA USA _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb