Spectroscopic survey telescope design: II. Tracking geometry
Abstract
Penn State University and the University of Texas are collaborating on an Arecibo-type optical telescope to be employed in a semi-transit mode for spectroscopic survey work. This telescope, clamped firmly to its foundation during observation, will employ a 5-axis servo-mechanism in the telescope's upper section to track an object's image locus on the focal sphere. The trigonometric mapping between the hour angle and declination functions of each object and five coordinates (representing XY travel, gimbal tilts, and radial focus, respectively) of the tracking device in the telescope's upper section, is a special transformation applicable to all telescopes of this type.
- Publication:
-
Advanced Technology Optical Telescopes IV
- Pub Date:
- July 1990
- DOI:
- 10.1117/12.19252
- Bibcode:
- 1990SPIE.1236..790R
- Keywords:
-
- Reflecting Telescopes;
- Servocontrol;
- Tracking (Position);
- Charge Coupled Devices;
- Design Analysis;
- Fiber Optics;
- Astronomy;
- Telescopes: Control Systems