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Performance of the microwave anisotropy probe ast-201 star trackers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | vanBezooijen, Roelof Ward, David K. |
| Copyright Year | 2002 |
| Description | The Microwave Anisotropy Probe (MAP) was launched to create a full-sky map of the cosmic microwave background. MAP incorporates two modified Lockheed Martin AST-201 (Autonomous Star Tracker) star trackers. The AST-201 employs an eight element radiation hardened lens assembly which is used to focus an image on a charge coupled device (CCD). The CCD image is then processed by a star identification algorithm which outputs a three-axis attitude. A CCD-shift algorithm called Time Delayed Integration (TDI) was also included in each star tracker. In order to provide some radiation effect filtering during MAP's three to five phasing loop passes through the Van Allen radiation belts, a simple pixel filtering scheme was implemented, rather than using a more complex, but more robust windowing algorithm. The trackers also include a fiber optic data interface. This paper details the ground testing that was accomplished on the MAP trackers. |
| File Size | 243004 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020060504 |
| Archival Resource Key | ark:/13960/t08w8c996 |
| Language | English |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Charge Coupled Devices Attitude Inclination Radiation Effects Ground Tests Algorithms Radiation Belts Spacecraft Guidance Ccd Star Tracker Microwave Probes Pixels Fiber Optics Lenses Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
