An analysis of the infrared irradiance data obtained from the upward- and downward-looking pyrgeometers on the NCAR Electra indicates that there are nonsystematic errors in the Monsoon Experiment (MONEX) data archived at the World Data Centers. The errors often exceed 8% of the downward flux and may be eliminated only by reanalyzing the 1 Hz data archived at NCAR. In addition, uncertainties in the measurement of the temperatures of the pyrgeometer surfaces lead to uncertainties in the corrected data, which may be important to particular applications.

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