GNU Chirp Sounder


I released my beacon satellite receiver a while ago. Now I’m releasing
my ionosonde receiver. It can be used to perform oblique and vertical
ionospheric soundings with ionosonde (and over the horizon radar)
transmitters all around the world.

The GNU Chirp Sounder is a software defined radio based receiver for
monitoring ionospheric sounders. The software is based on gnuradio and
relies on Ettus research USRP2 and USRP N210 based digital receivers.
The receiver can be used to receive the whole HF band (typically at 25
MHz bandwidth) simultaneously, and to receive multiple sounders
simultaneously. The current receiver can be used to perform single or
dual polarization (channel) soundings. The dual channel recorded can
be used to determine the polarization form vertical soundings, or for
angle of arrival measurements for horizontal soundings.