Mystery signal from a helicopter
11–20 of 83 posts
Re: Mystery signal from a helicopter
#12Re: Mystery signal from a helicopter
#13Re: Mystery signal from a helicopter
#14I wonder how much audio compression the signal can go through before getting lost, and if joint-stereo affected it. Might have to check out the data myself :) Props to Oona.
Re: Mystery signal from a helicopter
#15Nice bit of reverse-engineering, and an impressive hack from whoever built the system.
Not really a hack. Subcarriers are how they added color to TV, stereo to FM radio, and so on. WWV/WWVH also sends machine-readable time codes at 100Hz like this.
Re: Mystery signal from a helicopter
#16I love Oona Räisänen's blog. She's my hero. She combines a love of figuring stuff out with lots of fun hacks. And when I read her blog it makes me happy to see someone with that joy of uncovering mysteries.
Re: Mystery signal from a helicopter
#17Oona's work is always amazing. Loads of interesting hardware stuff in her blog. I wish I would be better at some mechanical engineering/electrical engineering stuff, my work is mostly web-related or big data stuff, never really get my hands dirty :(
Re: Mystery signal from a helicopter
#18I love Oona Räisänen's blog. She's my hero. She combines a love of figuring stuff out with lots of fun hacks. And when I read her blog it makes me happy to see someone with that joy of uncovering mysteries.
You've probably already seen it, but in case you haven't: her talk at 30C3 was excellent and is worth a watch. https://www.youtube.com/watch?v=R-2k6TMPMRo
Re: Mystery signal from a helicopter
#19Re: Mystery signal from a helicopter
#20Hmmm, makes me think twice about the beeping sounds I hear when my phone is right next to my radio. I know it's data being transmitted/received, but I wonder if it can be deciphered in this manner.