Accession Number:

AD0600970

Title:

LOWLIGHT COVERAGE FROM POLAR AND SUN-SYNCHRONOUS ORBITS.

Descriptive Note:

Corporate Author:

METEOROLOGICAL SATELLITE LAB WEATHER BUREAU WASHINGTON D C

Personal Author(s):

• Pyle,Robert L.

Report Date:

1964-04-01

Pagination or Media Count:

25.0

Abstract:

Satellites in polar inclination 90 degrees and sun-synchronous orbits unavoidably view regions of low illumination during a portion of each orbital pass. The fraction of the pass spent in lowlight areas changes little from day to day but may vary appreciably through the seasons. Analyzed here are the seasonal variations in lowlight coverage, as well as daylight and night coverage, provided by polar and sun-synchronous orbits with various orientations. Author

Descriptors:

• *ARTIFICIAL SATELLITES
• *POLAR ORBIT TRAJECTORIES
• ORBITS
• ARTIFICIAL SATELLITES
• ARTIFICIAL SATELLITES
• SKY BRIGHTNESS
• PERIODIC VARIATIONS
• TWILIGHT
• NIGHT SKY
• METEOROLOGICAL SATELLITES

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE