Snow Measurement
Airborne Snow Survey Program
- Snow Water Equivalent (SWE) estimated from attenuation of naturally occurring terrestrial gamma radiation.
- Typical flight line is 16 km long, measuring a ground swath 3000 m wide.
- Measures average SWE over area of ~5 km2
- 1800 flight lines throughout coterminous U.S.
- Two twin-engine aircraft fly ~900 lines/year.