Atmospheric Transmission Measurements at HF and DF Laser Wavelengths Using a Heterodyne Radiometer.

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Abstract:

Heterodyne radiometric systems operating in the wavelength ranges 2.5-3 micrometers and 3.5-4 micrometers have been constructed and have been used to make atmospheric transmission measurements at selected HF and DF laser lines. The spectral resolution of the system is 0.002cm, and the measured radiometer NEP was 5 x 10 to the minus 15th power watts for an output time constant of 30 sec. The measured transmissions at HF lines appear less than that predicted by theoretical considerations, while for the DF lines, the measured and calculated transmissions are consistent.

Author(s):
Shimabukuro, Fred I. ; King, Stephen R. ; Hartwick, Thomas S. ; Reber, Earl E. ; Spencer, Donald J.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CALIF AEROPHYSICS LAB
Descriptive Note:
Interim rept.,
Supplementary Note:
Also available as Rept. no. GIDEP-461.85.00.00-BA-02.
Pagination:
0032

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-0076(6752)-1, SAMSO-TR-76-36
Contract/Grant Number(s):
F04701-75-C-0076
Monitor Series:
TR-76-36, E055-1367
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*LASER BEAMS, *CHEMICAL LASERS, HETERODYNING, INFRARED LASERS, LIGHT TRANSMISSION, RADIOMETERS, ATMOSPHERES, HYDROGEN FLUORIDE, ATMOSPHERIC WINDOWS, DEUTERIUM COMPOUNDS
Field(s)/Group(s):
Atmospheric Physics, Optics
Keyword(s):
Hydrogen fluoride lasers, Deuterium fluoride lasers, *Atmospheric transmissivity, Atmospheric attenuation
Report Date:
1976 Feb 19