Mystery signal from a helicopter

Post by graupel » Sun, Feb 02, 2014, 9:35 PM UTC

unwind wrote: post #79

graupel wrote: post #54

We operate news helicopters at TV stations around the US and they all use a similar system. Basically the right channel of audio is typically the microphone from the pilot or reporter and the left channel is the audio feed transmitting what is basically modem data back with the GPS coordinates of the helicopter and some other data. This data is used at the antenna site to track the helicopter and point the antenna in…

I'm not a native speaker, but still have a pet peeve for that one. It's "line-of-sight" ( http://en.wikipedia.org/wiki/Line-of-sight ). Light travels in a straight line over (human-scale) long distances, so you need a straight line free from obstruction to see between two points. I'm sure you know this and just made a typo, of course. Thanks for the additional information about this interesting solution.

Post by phmera » Mon, Feb 03, 2014, 11:50 AM UTC

jgrahamc wrote: post #13

I 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.