INTERPRETATION OF TIROS II RADIATION MEASUREMENTS
Abstract
Transmissions due to different atmospheric gases for TIROS infrared sensors are computed. The relations between Channel 2 radiation and surface temperature, and Channel 4 and total radiation are derived from representative radiosonde ascen s. The variation of Channel 2 and 4 radiation with air mass is derived from selected orbits of TIROS II and compared with theoretical calculations. A discrepancy exists between theoretical and observed limb darkening. A comparison between t e observed and theoretical relations for Channels 2 and 4 indicates either an error in the relative calibrations or that the effect of atmospheric absorption on Channel 4 in relation to Channel 2 is greater than that determined empirically from laboratory data. A preliminary comparison is made of albedos deduced from Channel 3 observations with surface temperatures determined from Channel 2 observations The albedos appear appropriate to clear, partial cloudy and overcast conditions. A comparison of Channel 2 observations with synoptic weather conditions shows an excell nt fit in the locations of clear and high overcast areas. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1962
- Accession Number
- AD0277275
Entities
People
- Raymond Wexler