Anderson Nikolaus, Czapla-Myers Jeffrey, Leisso Nathan, Biggar Stuart, Burkhart Charles, Kingston Rob, Thome Kurtis
Remote Sensing Group, College of Optical Sciences, University of Arizona, 1630 East University Boulevard, Tucson, AZ 85721, USA.
Appl Opt. 2013 Jan 10;52(2):231-40. doi: 10.1364/AO.52.000231.
Three improved ground-viewing radiometers were built to support the Radiometric Calibration Test Site (RadCaTS) developed by the Remote Sensing Group (RSG) at the University of Arizona. Improved over previous light-emitting diode based versions, these filter-based radiometers employ seven silicon detectors and one InGaAs detector covering a wavelength range of 400-1550 nm. They are temperature controlled and designed for greater stability and lower noise. The radiometer systems show signal-to-noise ratios of greater than 1000 for all eight channels at typical field calibration signal levels. Predeployment laboratory radiance calibrations using a 1 m spherical integrating source compare well with in situ field calibrations using the solar radiation based calibration method; all bands are within ±2.7% for the case tested.
