Integrated Radiometric Profiler for Atmospheric Humidity and TemperatureMeasurements

摘要

A 9 channel, integrated radiometer for recording multi-frequency sky brightnesstemperatures from which atmospheric integrated water, and water vapor and temperature profiles may be estimated has been designed, constructed and field-tested. The radiometer includes 3 water-dependent (22.25, 23.9, 31.45 GHz) and 6 oxygen-dependent (50.5, 53.0, 53.6, 54.89, 58.64, 61.03 GHz) frequencies. The radiometer includes 4 Dicke-type subsystems of 2, 1, 3 and 3 multiplexed frequencies each. Control and signal processing functions are accomplished using 8 digital signal processors, 2 per subsystem, which are in turn controlled by an 80286-equipped host computer. The basic radiometer package, exclusive of the host computer and multichannel signal processing chassis, is about 1/2 x 1/2 x 1 m and is designed for airborne and shipboard (antenna pedestal) mounting as well as ground-based overland operation. All system, antenna pointing control, and signal processing functions are handled through the host computer. The radiometer may be readily used in combination with wind profilers, ceilometer, sodar and other measurement systems as are useful for improving the precision and spatial resolution of inverted water and temperature profiles. (rrh)