Comparison of MTI Water Temperatures with Ground Truth Measurements at Crater Lake, OR

Kurzeja, R.J.

Savannah River Site (S.C.)

关键词: Remote Sensing;    Seas;    Temperature Gradients;    Lakes;    Oregon;   

DOI  :  10.2172/805806
RP-ID  :  WSRC-TR-2002-00415
RP-ID  :  AC09-96SR18500
RP-ID  :  805806

美国|英语

来源: UNT Digital Library

【 摘 要 】

Water surface temperatures calculated with the Los Alamos National Laboratory Robust algorithm were compared with ground truth water temperature measurements near the Oregon State University buoy in Crater Lake, OR. Bulk water measurements at the OSU buoy were corrected for the skin temperature depression and temperature gradient in the top 10 cm of the water to find the water surface temperature for 18 MTI images for June 2000 to Feb 2002. The MTI robust temperatures were found to be biased by 0.1C, with an RMS error of 1.9C compared with the ground truth water surface temperatures. When corrected for the errors in the buoy temperatures the RMS was reduced to 1.3C. This RMS difference is greater than the 1C found at the Pacific Island of Nauru because of the greater variability in the lake temperature and the atmosphere at Crater Lake and the much smaller target area used in the comparison.