| Calibration - Nonlinear Radiometer Response |
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Then, |
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Two-point radiometer calibration eliminates b0 and b1 from <V>, so that |
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Here,
K=Boltzman's constant, G=Amplifier gain, B=Bandwidth, T=Amplifier temperature, Ts=Radiometric temperature |
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Two-point calibration:
| Warm (internal blackbody) target: Tw, Cw |
| Cold target: |
in lab, Tc=84K, Cc |
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in space, Tc=2.73K, Cc |
| Cw, Cc = radiometeric counts from view of warm and space target, respectively. |
| Tw, Tc = physical temperatures of warm and space target, respectively. |
| Note: The nonlinearity (of the order of 1K) cannot be evaluated by the two-point calibration and must be determined in the lab. |
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Nonlinearity Spec: Ch1,2,15 : 0.5K Ch.3-14: 0.375K A1-1 Channels: Out of spec |
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