subastral point

subastral point

[¦səb′as·trəl ′pȯint]
(astronomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Only when each of the 96,576 sampling points can be covered by the satellite, whose subastral point is any one of the 54 edge points, the area is deemed covered completely.
Step 4: [If] The target cannot be covered when subastral points are [p.sub.s1] and [p.sub.s2].
The subastral point is located at (E 0[degrees], N 0[degrees]), and the focal plane of the detector is area array of 1024 x 1024 infrared CCD.