Publication Date:
1977-09-01
Description:
Significant differences in U.S. and U.S.S.R. aircraft measurements of hemispherical infrared irradiance were noted during GATE in-flight intercomparisons. In specific instances the downward irradiance measured by the U.S.S.R. instrument (a Kozyrev pyrgeometer) was as much as 1.5 times greater than the irradiance measured with the U.S. instrument (an Eppley pyrgeometer). A post-GATE intercomparison at Colorado State University verified these differences; the pyrgeometer measurements were compared with independent measurements obtained with an infrared bolometer and with a radiative transfer calculation. The differences noted during GATE and post-GATE intercomparisons may be attributed to differences in calibration techniques and the accurate determination of the temperature of the instrument's thermopile reference junctions. When corrections based upon this analysis were applied to the U.S.S.R. data, the maximum intercomparison differences between the U.S. and the U.S.S.R. data were
Print ISSN:
0003-0007
Electronic ISSN:
1520-0477
Topics:
Geography
,
Physics
