SP-4012 NASA HISTORICAL DATA BOOK: VOLUME III
PROGRAMS AND PROJECTS 1969-1978
 
 

Figure 4-3. At an altitude of 11 112 kilometers, ground resolution was 7.67 km.

Figure 4-3. At an altitude of 11 112 kilometers, ground resolution was 7.67 km. The scan rate of 48 rpm provided contiguous coverage along the satellite's path. Due to the earth-scan geometry of THIR, as nadir angle increased, overlapping occurred between consecutive scans, reaching 350 percent overlap at the horizons and resulting in a loss of ground resolution in the direction of the satellite motion. This figure shows the relationship between nadir angle and ground resolution element size along the path of the satellite.

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