Status of the cryogenic telescope and guide star for Gravity Probe B
| Autor: | John A. Lipa, K.A. Bower, L. W. Huff, S. Wang, Dz-Hung Gwo |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Atmospheric Science
Aerospace Engineering Astrophysics::Cosmology and Extragalactic Astrophysics law.invention Telescope Optics law Astrophysics::Solar and Stellar Astrophysics Focal length Astrophysics::Galaxy Astrophysics Fused quartz Physics Spacecraft business.industry Detector Astrophysics::Instrumentation and Methods for Astrophysics Astronomy Astronomy and Astrophysics Gyroscope Geophysics Laser guide star Space and Planetary Science General Earth and Planetary Sciences Astrophysics::Earth and Planetary Astrophysics Guide star business |
| Zdroj: | Advances in Space Research. 25:1189-1192 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/s0273-1177(99)00985-0 |
| Popis: | We describe the status of the development and testing of the star tracking telescope for Gravity Probe B. The fused quartz telescope with an aperture of 14 cm and 3.8 m effective focal length is attached to the gyroscope housing and continuously points to a guide star. A star image divider assembly in conjunction with cryogenic photo detectors is used to provide quadrant pointing information which is used to maintain the attitude of the spacecraft. Development and testing of the flight telescope has been completed. The optical test results will be discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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