By Ben Hilburn | February 21, 2018
At 1222 EST on 21 Feb 2018, we posted a new signals challenge! There are three different challenges hidden in this signal capture, and the solution to each is a text message. One is on the easier side, and the two others are more advanced. If you believe you have found a solution, DM the answer to @gnuradio on Twitter or e-mail bhilburn@gnuradio.org
The first THREE people to solve each of the three challenges will be declared winners. One person can only win one challenge; if correct solutions are submitted for multiple challenges, the most valuable will count as the win (a #1 spot, for example). If someone solves all three challenges before the other nine winner spots are taken, they will be declared the Hat Trick Winner, and will receive a special one-time t-shirt. Only one of these shirts will ever be printed.
The winners will receive honor and glory. Also, there will also be stickers and t-shirts awarded! See the list below for details.
The challenge will end when all ten spots have been claimed, or at 0000 EST (GMT-5) Mon 26 Feb – whichever comes first.
THE CHALLENGE HAS CONCLUDED
Good luck, and Happy Hacking!
HINT (Posted 22 Feb): Only one of the challenges is in the obvious signal. HINT (Posted 23 Feb): The loud broadband signal is coming from a satellite. HINT (Posted 24 Feb): The satellite signal is imagery. The rabbit signal is normally a subcarrier with metadata. HINT (Posted 25 Feb): Find the numbers station.
Note: The SigMF meta file has a small error – fc32_le should read cf32_le.
https://drive.google.com/file/d/1-bAdy_egdyb6xPA8rrvf32WgnDTSI29P/view?usp=sharing
Challenge 1 Winners:
- GNU Radio t-shirt: Malcolm Stagg — @malcolmst
- Stickers: Chris Shaw — @chrishaw
Challenge 2 Winners:
- **GNU Radio t-shirt: **Gérald Bastelica (Hat Tricked! Also solved #1 and #3!)
- Stickers: Daniel Brnak
- Stickers: James Kondel
Challenge 3 Winners:
- GNU Radio t-shirt: GuruMeditation
- Stickers: <unclaimed>
- Stickers: <unclaimed>
The Hat Trick: