Subject: | NSA/IRT/C1 - Measurement below minimum threshold |
DataStreams: | nsairtC1.b1, nsairt200msC1.a1
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Description: | When the actual sky temperature is less than the minimum measureable of 213.2K (-60C), the
IRT (serial) value is mostly -9999 (missing) with an occasionally valid but usually not
accurate reading, resulting in the "noisy" data. This situation will occur only during
periods of very clear skies with low precipitable water vapor (cold and dry).
The problem was be solved by upgrading the IRT to a model with a lower measuring threshold
of 173.2K (-100C). |
Suggestions: | Disregard sky temperature measurements when sky_ir_temp, as measured by the SKYRAD
analog signal (skyrad60s), is less than or equal to the minimum value of 213.2 K. |
Measurements: | nsairt200msC1.a1: more
nsairtC1.b1: - sky_ir_temp_min
- sky_ir_temp_std
- sky_ir_temp
- sky_ir_temp_max
more
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