A Visible and Near-Infrared Scanning Photometer for Field Measurements of Spectral Albedo and Irradiance under Polar Conditions

• Published in: Journal of Glaciology
• Main Author: Grenfell, T. C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1981
• Subjects: Earth-Surface Processes; Arctic; Turret; albedo; Journal of Glaciology; Sea ice
• Online Access: http://dx.doi.org/10.1017/s0022143000011503; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011503

Abstract The design and operating characteristics are presented for a visible and near-infrared scanning photometer which can measure incident and reflected spectral irradiance from 400 nm to 2 450 nm. The instrument is designed to record over 98% of the solar radiation incident upon and reflected from the Earth’s surface using a turret-type cosine collector and a circular variable interference filter. The apparatus has been tested successfully on Arctic sea ice at temperatures down to –20°C. It is self-contained and easily portable, and its mass is less than 16 kg. Some preliminary results are presented.