A calibration procedure for airborne gamma ray snow surveys
Title | A calibration procedure for airborne gamma ray snow surveys |
Publication Type | Conference Proceedings |
Year of Conference | 1980 |
Authors | Glynn, J. E., and Grasty R. L. |
Conference Name | 48th Annual Western Snow Conference |
Series Title | Proceedings of the 48th Annual Western Snow Conference |
Date Published | April 1980 |
Publisher | Western Snow Conference |
Conference Location | Laramie, Wyoming |
Keywords | Gamma ray snow survey, Remote sensing |
Abstract | Using an airborne gamma ray spectrometer, nine pre-snow and nine snow flights were carried out at different altitudes over a site in eastern Ontario, based on air attenuation coefficients, snow-water equivalents were calculated for the total count (0.41 - 2.81 Mev), potassium (1.36 - 1.56 Mev), and thorium (2.41 - 2.81 Mev) windows. An iterative procedure incorporating height dependent stripping ratios was used to correct for Compton scattering in the snowpack and in the air. Soil moisture corrections were also applied. The standard deviation in the calculated snow-water equivalent from the total count, potassium, and thorium windows for the nine snow flights had values of .1, 1.2, and 1.3 cm water respectively and the results agreed with ground measurements of 14 +/- 3 cm. |
URL | sites/westernsnowconference.org/PDFs/1980Glynn.pdf |