In this paper, we explore star tracker error sources and the design and calibration techniques utilized in ASTRA to eliminate or minimize those errors. An error tree presents high and low special frequency centroiding error sources and their influence on the tracker's design. Requirements for thermal control of the detector and for optical calibration are discussed along with an overview of the data processing function. Finally, we present hardware test results that demonstrate a significant improvement in accuracy and sensitivity relative to existing tube-type trackers. |
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CITATIONS
Cited by 1 scholarly publication.
Stars
Charge-coupled devices
Sensors
Calibration
Data processing
Electronics
Space operations