Reflectance- and Radiance-Based Methods for the In-Flight Absolute Calibration of Multispectral Sensors
1987
Slater, P.N. | Biggar, S.F. | Holm, R.G. | Jackson, R.D. | Mao, Y. | Moran, M.S. | Palmer, J.M. | Yuan, B.
Variations reported in the in-flight absolute radiometric calibration of the Coastal Zone Color Scanner (CZCS) and the Thematic Mapper (TM) on Landsat 4 are reviewed. At short wavelengths these sensors exhibited a gradual reduction in response, while in the midinfrared the TM showed oscillatory variations, according to the results of TM internal calibration. The methodology and results are presented for five reflectance-based calibrations of the Landsat 5 TM at White Sands, NM, in the period July 1984 to November 1985. These show a +/-2.8% standard deviation (1 sigma) for the six solar-reflective bands. Analysis and preliminary results of a second, independent calibration method based on radiance measurements from a helicopter at White Sands indicate that this is potentially an accurate method for corroborating the results from the reflectance-based method.
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