| Type |
Conference Paper |
| Names |
J. W. Percival, K. H. Nordsieck, F. R. Harnden, Francis A. Primini, Harry E. Payne |
| Proceedings Title |
ASP Conference Series |
| Conference Name |
Astronomical Data Analysis Software and Systems X |
| Place |
San Francisco, CA |
| Publisher |
Astronomical Society of the Pacific |
| Volume |
238 |
| Pages |
463 |
| Series |
ASP Conference Series |
| Date |
2001 |
| Short Title |
The ST5000 |
| URL |
http://adsabs.harvard.edu/abs/2001ASPC..238..463P |
| Library Catalog |
NASA ADS |
| Abstract |
The Space Astronomy Laboratory is building an attitude determination and
digital imaging system with embedded compression. The attitude
determination system uses a 30-square-degree field of view and an
embedded star catalog to determine the Right Ascension and Declination
of its line of sight to better than 5 arcseconds. The digital imaging
subsystem uses a scheme of ``progressive image transmission'' in which
the image is sent out over a very-low-bandwidth channel, such as a
spacecraft telemetry downlink, in such a way that it can be
reconstructed ``on the fly'' and updated as more data arrive. Large
(768×474) useful images can be obtained over a 4-kbit downlink in
as little as 10 seconds. In addition to its use in sounding rockets and
spacecraft, we are planning to use it for two ground-based applications
at the Southern Africa Large Telescope (SALT). We will explore its use
in generating real-time measurements of the telescope pointing,
independent of the telescope control system, and we will use the low
bandwidth imaging capability for public outreach. |