Star tracker stellar compass for the Clementine mission

Conference · Sat Apr 01 00:00:00 EST 1995

OSTI ID:86977

Kordas, J F; Lewis, I T; Wilson, B A ^[1]

---

1. and others

The Clementine mission provided the first ever complete, systematic surface mapping of the moon from the ultra-violet to the near-infrared regions. More than 1.7 million images of the moon, earth and space were returned from this mission. Two star tracker stellar compasses (star tracker camera + stellar compass software) were included on the spacecraft, serving a primary function of providing angle updates to the guidance and navigation system. These cameras served a secondary function by providing a wide field of view imaging capability for lunar horizon glow and other dark-side imaging data. This 290 g camera using a 576 x 384 FPA and a 17 mm entrance pupil, detected and centroided stars as dim and dimmer than 4.5 m{sub v}, providing rms pointing accuracy of better than 100 {micro}rad pitch and yaw and 450 {micro}rad roll. A description of this light-weight, low power star tracker camera along with a summary of lessons learned is presented. Design goals and preliminary on-orbit performance estimates are addressed in terms of meeting the mission`s primary objective for flight qualifying the sensors for future Department of Defense flights.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 86977
• Report Number(s): UCRL-JC-120867; CONF-950472-9; ON: DE95014384; TRN: AHC29521%%33
• Resource Relation: Conference: SPIE international symposium on aerospace/defense sensing and dual-use photonics, Orlando, FL (United States), 17-21 Apr 1995; Other Information: PBD: Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BALLISTIC MISSILE DEFENSE
CAMERAS
NAVIGATIONAL INSTRUMENTS
FLIGHT TESTING
ELECTRONIC GUIDANCE
NAVIGATION
MOON
REMOTE SENSING
DESIGN
OPERATION
COMPUTERIZED CONTROL SYSTEMS
CALIBRATION
PERFORMANCE
IMAGES