Modifications to GTE Sylvania Thermosonde for Improved Operation.
AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
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A commercially available thermosonde system, used to provide vertical atmospheric optical turbulence atmospheric refractive index coefficient profiles, has been evaluated and modified for use in an extensive program to support optical propagation experiments. The thermosondes previous uses by the NASA Goddard Space Flight Center and the AF Avionics Laboratory revealed several system limitations which this modification eliminated. the system was modified to 1 simplify probe replacement calibration procedure, 92 use commercially available fine wire probes which are more sensitive, easier to handle, and less expensive than factory supplied probes, 3 shift the temperature difference response of the system to the center of the range experienced in previous tests, 4 reduce the ascent rate for improved vertical resolution, 5 allow for magnetic tape recording and computer processing of data.