Radiometric characterization of field radiometers in support of the 1997 Lunar Lake, Nevada, experiment to determine surface reflectance and top-of-atmosphere radiance

A continuing series of field campaigns to Lunar Lake, Nevada, has been esta blished to develop measurement protocols and assess the uncertainties of gr ound-based calibrations of on-orbit satellite sensors. In June 1997, an ens emble of field radiometers was deployed to validate the fundamental reflect ance and radiance measurements of the Land Satellite (Landsat-5) Thematic M apper (TM) and Satellite Pour l'Observation de la Terre (SPOT-2) Haute Reso lution Visible (HRV) satellite instruments. Prior their deployment to Lunar Lake, many of the field instruments measured a common sphere source at the University of Arizona (UA). The results, presented in this work, showed va riations in the relative stabilities of the field instruments, and demonstr ate the need for in-depth characterization of field instruments for an accu rate assessment of instrument performance and measurement uncertainty. (C) 2001 Published by Elsevier Science Inc.