3 ms·

I wonder if there is some way you could pull data from the sound of the waves breaking instead of an active ping? That might be the only reasonable way to get a

by issa 5y ago

I wonder if there is some way you could pull data from the sound of the waves breaking instead of an active ping? That might be the only reasonable way to get accurate readings in that zone.

westurner 5y ago
FWIU, EM backscatter can be used for e.g. gesture recognition, heartbeat detection, and metal detection. https://en.wikipedia.org/wiki/Backscatter https://en.wikipedia.org/wiki/Backscatter Entropy of wave noises may or may not be the issue. Edit: (NASA spinoff) "Radar Device Detects Heartbeats Trapped under Wreckage" https://spinoff.nasa.gov/Spinoff2018/ps_1.html https://spinoff.nasa.gov/Spinoff2018/ps_1.html > The Edgewood, Maryland-based company is developing a line of such remote sensing devices to aid search and rescue teams, based on advanced radar technologies developed by NASA and refined for this purpose at the Agency’s Jet Propulsion Laboratory (JPL). > NASA has long analyzed weak radio signals to identify slight physical movements, such as seismic activity seen from low-Earth orbit or minor alterations in a satellite’s path around another planet that might indicate gravity fluctuations, explains Jim Lux, JPL’s task manager for the FINDER project. However, to pick out such faint patterns in the data, these devices must cancel out huge amounts of noise. “The core technology here is measuring a small signal in the context of another larger signal that’s confusing you,” Lux says. (FWIW, some branches may have helicopters with infrared that they can cost over for disaster relief.)
foobarbecue 5y ago
That could be really interesting. A friend of mine did some volcano seismic tomography this way, using the constant eruptions from the lava lake as a sort of background noise source. The theory used is called "equipartition wave theory" IIRC.

3 ms·

I wonder if there is some way you could pull data from the sound of the waves breaking instead of an active ping? That might be the only reasonable way to get a

by issa 5y ago

I wonder if there is some way you could pull data from the sound of the waves breaking instead of an active ping? That might be the only reasonable way to get accurate readings in that zone.

westurner 5y ago
FWIU, EM backscatter can be used for e.g. gesture recognition, heartbeat detection, and metal detection. https://en.wikipedia.org/wiki/Backscatter https://en.wikipedia.org/wiki/Backscatter Entropy of wave noises may or may not be the issue. Edit: (NASA spinoff) "Radar Device Detects Heartbeats Trapped under Wreckage" https://spinoff.nasa.gov/Spinoff2018/ps_1.html https://spinoff.nasa.gov/Spinoff2018/ps_1.html > The Edgewood, Maryland-based company is developing a line of such remote sensing devices to aid search and rescue teams, based on advanced radar technologies developed by NASA and refined for this purpose at the Agency’s Jet Propulsion Laboratory (JPL). > NASA has long analyzed weak radio signals to identify slight physical movements, such as seismic activity seen from low-Earth orbit or minor alterations in a satellite’s path around another planet that might indicate gravity fluctuations, explains Jim Lux, JPL’s task manager for the FINDER project. However, to pick out such faint patterns in the data, these devices must cancel out huge amounts of noise. “The core technology here is measuring a small signal in the context of another larger signal that’s confusing you,” Lux says. (FWIW, some branches may have helicopters with infrared that they can cost over for disaster relief.)
foobarbecue 5y ago
That could be really interesting. A friend of mine did some volcano seismic tomography this way, using the constant eruptions from the lava lake as a sort of background noise source. The theory used is called "equipartition wave theory" IIRC.