3 ms·
This reminded me of power line frequency[1] being used to identify when and where recordings were taken. Governments keep historical records of subtle changes i
by caymanjim 3y ago
This reminded me of power line frequency[1] being used to identify when and where recordings were taken. Governments keep historical records of subtle changes in power frequency and can extract the background hum to identify location and time.
1: https://en.wikipedia.org/wiki/Electrical_network_frequency_analysis https://en.wikipedia.org/wiki/Electrical_network_frequency_a...
- m463 3y agoI wonder if they can do that with gps. Like record a short blip of "unlocked" gps spectrum, then recreate the location offline later using saved ephemerals and other data.