Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1996-12-13
1998-09-22
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342174, 342354, H04B 7185
Patent
active
058120840
ABSTRACT:
The precise three-axis attitude of a space-borne phases-array antenna is estimated based on the assumption that the array geometry, consisting of the number of radiating elements and their relative spacing in three dimensions, is known and that the array position and coarse knowledge of the array attitude are available a priori. An estimate is first made of the set of complex-valued gains that define each element's straight-through contribution to the signals received at each of two or more remote calibration sites, where a "straight-through" antenna configuration is defined as the condition in which all elements are made to radiate with the same amplitude and phase. An optimization strategy is then used to determine which array attitude lying in the neighborhood of the coarsely known attitude is most consistent with the full set of straight-through gain values. Another technique for estimating the precise angular location of a receiver with respect to the coordinates of the space-borne phased-array antenna is based on the assumptions that the array geometry is known, and that the receiver bearing is coarsely known or available. After an estimate is made of the set of complex-valued gains that define each element's straight-through contribution to a composite signal measured at the receiver site, an optimization strategy is used to determine which receiver direction lying in the neighborhood of the coarsely known direction is most consistent with the latter set of straight-through gain values.
REFERENCES:
patent: 4599619 (1986-07-01), Keigler et al.
patent: 4630058 (1986-12-01), Brown
patent: 4658361 (1987-04-01), Kosaker et al.
patent: 5258764 (1993-11-01), Malinowski
patent: 5355138 (1994-10-01), Cances et al.
patent: 5572219 (1996-11-01), Silverstein et al.
U.S. Patent Application 08/449,796, SD Silverstein, RL Nevin, WE Engeler, "Method and Apparatus For Remotely Calibrating A Phased System Used For Satellite Communication Using A Unitary Transform Encoder", filed Jul. 7, 1995.
Ashe Jeffrey Michael
Bonanni Pierino Gianni
Silverstein Seth David
General Electric Company
Phan Dao L.
Snyder Marvin
Stoner Douglas E.
Tarcza Thomas H.
LandOfFree
Method for estimating the precise orientation of a satellite-bor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for estimating the precise orientation of a satellite-bor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for estimating the precise orientation of a satellite-bor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1626452