An advanced star tracker design using the charge injection device
Abstract
The salient design features of the system, along with the results that have been obtained thus far, are summarized. It is pointed out that a star tracker with a capability of tracking to an accuracy of better than 0.1 pixel is now feasible. The unique acquisition and tracking concepts employed, when combined with the CID (charge injection device) performance, reject spatial noise and offer high accuracy and rate tracking capability with minimum size, weight, and power. The tests have demonstrated an accuracy of 1 part in 17,000, equivalent to 1.7 arc sec for an 8-deg field of view. Flight-quality hardware and improvements in test equipment are expected to improve the performance by a factor of approximately two. A chart summarizing CID performance is included, showing a pixel size of 20 x 20 microns, an array size of 256 x 256 pixels, a quantum yield greater than 0.3, and a dark current variation of less than 3 percent.
- Publication:
-
Automatic Control in Space 1982
- Pub Date:
- 1983
- Bibcode:
- 1983aucs.proc..297K
- Keywords:
-
- Attitude Control;
- Charge Injection Devices;
- Guidance Sensors;
- Pointing Control Systems;
- Spacecraft Instruments;
- Star Trackers;
- Bias;
- Breadboard Models;
- Error Analysis;
- Noise Reduction;
- Performance Prediction;
- Transfer Functions;
- Spacecraft Instrumentation