| 摘要 |
PROBLEM TO BE SOLVED: To frequently and accurately calibrate a low temperature side of a total power microwave radiometer for a satellite. SOLUTION: A high temperature calibration source having a temperature of T<SB>hot1</SB>, a luminance temperature of a high temperature calibration source having a temperature of T<SB>hot2</SB>, which is different from the T<SB>hot1</SB>, a luminance temperature of a low temperature calibration source are measured by a receiver. Standard deviations of the measured values,ΔT<SB>hot1</SB>,ΔT<SB>hot2</SB>, andΔT<SB>co1d</SB>are calculated. The luminance temperature of the low temperature calibration source is calculated from the calculated standard deviations using Equation and used to calibrate the total power microwave radiometer for the satellite. COPYRIGHT: (C)2004,JPO
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