| Type |
Conference Paper |
| Names |
Jeffrey W. Percival, B. Babler, R. Bonomo, S. Gabelt, Walter M. Harris, Kurt A. Jaehnig, Donald E. Michalski, Kenneth H. Nordsieck |
| Conference Name |
Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series |
| Volume |
4013 |
| Pages |
394-400 |
| Date |
July 1, 2000 |
| URL |
http://adsabs.harvard.edu/abs/2000SPIE.4013..394P |
| Library Catalog |
NASA ADS |
| Abstract |
The Space Astronomy Laboratory has built and flown a very- low-cost
(approximately 50K) star tracker and digital imaging system with
embedded compression. The star tracker is suitable for all rocket and
spacecraft applications, and provides pitch, yaw, and roll updates at
rates up to 10 Hz. The digital imaging subsystem uses a novel
NASA-funded scheme of `progressive image transmission' in which the
image is sent out over a very-low-bandwidth channel, such as a telemetry
downlink, in such a way that it can be reconstructed `on the fly' and
updated as more data arrive. Large (768 X 474) useful images can be
obtained over a 4- kbit/s downlink in as little as 10 seconds. This
device can act as an aspect camera, a deployment monitor, or a science
imager in situations where low bandwidth is desired or high bandwidth is
not available. |