Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Aeronautical vehicle
Reexamination Certificate
2005-07-06
2010-11-09
Tran, Khoi (Department: 3664)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Aeronautical vehicle
C701S003000, C701S200000
Reexamination Certificate
active
07831341
ABSTRACT:
A system and method for navigation utilizes sources of modulated celestial radiation. A spacecraft, satellite, or other vehicle (12) includes one or more modulated radiation sensors (22a-22x) for detecting a modulated signal (14) generated by one or more pulsars or other celestial objects (16). Pulse time of arrival at a respective pulse sensor (22a-22x) is measured by comparing the pulse signal (14) with a known pulse profile. A processor (30) calculates a timing difference between the measured pulse time of arrival at sensor (22a-22x) with a calculated pulse time of arrival at a selected reference point (100). Positions and pulse profile characteristics of the pulsars (16) are stored. Combining the calculated time difference with the known positions of pulsars (16), navigational parameters such as position, velocity, and attitude for spacecraft (12) with respect to the selected localized reference point (100) can be calculated.
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Gary W. Richter
Holwerda Stephen
Rosenberg , Klein & Lee
Tran Khoi
University of Maryland
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