Appendix: Mean Atmospheric Temperature at Microwaves and Millimeter Waves in Clear Air Environment

The use of microwave and millimeter wave radiometric measurements of tropospheric temperature and integrated water vapor is well established by several authors. But the evaluation of the desired accuracy in radio-metric measurement depends on several factors, such as the spatial and temporal humidity profile available from radiosonde data, which is not exact because the ascending balloon follows a random path for wind blow during telemetry. Besides this, the other source of error in brightness temperature measurement by a passive radiometer may creep in through the choice of mean atmospheric temperature, which is supposed to be the only parameter ...

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