Science and Exploration

ISEE-3 Reboot Project Hardware Detects ISEE-3 at Arecibo

By Keith Cowing
May 20, 2014
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ISEE-3 Reboot Project Hardware Detects ISEE-3 at Arecibo
ISEE-3 Signal
ISEE-3 Reboot Project

The following are screenshots of data from the live receive session we did with our Ettus Research Software Defined Radio unit attached to the Arecibo antenna on 19 May.
“Waterfalls” were generated by post-processing the recorded data. There are four recordings of various lengths as we were testing the setup, and this is the very, very initial result.

The first and second screenshot images were taken during the live capture. You can see the faint diagonal line of the carrier. This is a simple flowgraph Balint Seeber put together in GNU Radio that receives samples from the USRP (which is in turn connected to the IF output from their existing S-band receiver), records the samples to disk and also displays the FFT and waterfall plots of a selectable narrow-band portion of the spectrum.

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