NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
orbit and geometry constraints on the design and operation of a long-life sirtf missionFor a long-life SIRTF mission, the ability of the telescope to observe targets everywhere in the sky is an important requirement. For low-inclination orbits, a telescope aperture shade must be designed for Sun and Earth Limb avoidance angles of 50 deg to 60 deg to prevent unwanted radiation from entering the telescope. The minimum orbit inclination depends on the Earth Limb avoidance angle. About 30 percent of the sky will be prohibited for observations during any day in orbit, with about 100 days in orbit required to observe the entire sky.
Document ID
19840035232
Document Type
Conference Paper
Authors
Jackson, R. W.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
ASTRONAUTICS (GENERAL)
Report/Patent Number
AIAA PAPER 84-0316
Distribution Limits
Public
Copyright
Other