3 ms·

Or just people driving around with a bike and a detector? 7 km x 7 km might take a while but it should be possible within a few days?

amelius 5y ago
Sounds like EPA is either too lazy or they're trying to conceal something.
floatingatoll 5y ago
Has anyone made a generic "I am willing to carry one or more sensors on my bicycle, and criss-cross an area as long as software tells me where I need to go next" app that we can all use to congregate sensor readings with? Methane, decibel levels, all sorts of opportunities here.
- Gravityloss 5y ago
  Airliners gather some air measurements, at least CO2. Don't know how widely: https://journals.ametsoc.org/view/journals/atot/25/10/2008jtecha1082_1.xml https://journals.ametsoc.org/view/journals/atot/25/10/2008jt... https://newsroom.usra.edu/commercial-airliners-monitoring-carbon-dioxide-emissions-from-cities-worldwide/ https://newsroom.usra.edu/commercial-airliners-monitoring-ca... Airline routes are not sampling evenly though, and flying at 10 km height means ground level resolution is very very low.
rapjr9 5y ago
I worked on a project called Bikenet at Dartmouth College that used bicycles for sensing carbon dioxide: https://www.cs.dartmouth.edu/~sensorlab/pubs/BikeNet-SenSys07.pdf https://www.cs.dartmouth.edu/~sensorlab/pubs/BikeNet-SenSys0... http://sensorlab.cs.dartmouth.edu/pubs/a6-eisenman.pdf http://sensorlab.cs.dartmouth.edu/pubs/a6-eisenman.pdf We tried measuring carbon monoxide also but CO is lighter than air so we got no measurements. Methane is also lighter than air and would probably not be measurable on the ground unless you were very close to the source. However, the biker could carry a drone with a methane sensor and launch it periodically: https://www.ravanair.com/drone-uav-methane-gas-detection/ https://www.ravanair.com/drone-uav-methane-gas-detection/ Maybe a laser could be mounted on the bike firing straight up and be used to detect methane?: https://www.crowcon.com/products/portables/lmm-gen-2/ https://www.crowcon.com/products/portables/lmm-gen-2/ I wanted to add radiation sensors to the bikes but the prof vetoed that idea, afraid it might affect property values in the town if we actually found differences in radiation levels.

amelius 5y ago

Sounds like EPA is either too lazy or they're trying to conceal something.

floatingatoll 5y ago

Has anyone made a generic "I am willing to carry one or more sensors on my bicycle, and criss-cross an area as long as software tells me where I need to go next" app that we can all use to congregate sensor readings with? Methane, decibel levels, all sorts of opportunities here.

Gravityloss 5y ago
Airliners gather some air measurements, at least CO2. Don't know how widely: https://journals.ametsoc.org/view/journals/atot/25/10/2008jtecha1082_1.xml https://journals.ametsoc.org/view/journals/atot/25/10/2008jt... https://newsroom.usra.edu/commercial-airliners-monitoring-carbon-dioxide-emissions-from-cities-worldwide/ https://newsroom.usra.edu/commercial-airliners-monitoring-ca... Airline routes are not sampling evenly though, and flying at 10 km height means ground level resolution is very very low.

rapjr9 5y ago

I worked on a project called Bikenet at Dartmouth College that used bicycles for sensing carbon dioxide: https://www.cs.dartmouth.edu/~sensorlab/pubs/BikeNet-SenSys07.pdf https://www.cs.dartmouth.edu/~sensorlab/pubs/BikeNet-SenSys0... http://sensorlab.cs.dartmouth.edu/pubs/a6-eisenman.pdf http://sensorlab.cs.dartmouth.edu/pubs/a6-eisenman.pdf We tried measuring carbon monoxide also but CO is lighter than air so we got no measurements. Methane is also lighter than air and would probably not be measurable on the ground unless you were very close to the source. However, the biker could carry a drone with a methane sensor and launch it periodically: https://www.ravanair.com/drone-uav-methane-gas-detection/ https://www.ravanair.com/drone-uav-methane-gas-detection/ Maybe a laser could be mounted on the bike firing straight up and be used to detect methane?: https://www.crowcon.com/products/portables/lmm-gen-2/ https://www.crowcon.com/products/portables/lmm-gen-2/ I wanted to add radiation sensors to the bikes but the prof vetoed that idea, afraid it might affect property values in the town if we actually found differences in radiation levels.