Redundant Estimation of Orientation.
Abstract
An efficient method is presented for statistically estimating the orientation of satellite bodies and body-mounted sensors. The linearized digital filter postulated processes stellar sightings to infer the probable attitude, angular velocity, instrumentation compensations and, if needed, the sensor pointing. The approach described formulates the estimation problem with redundant coordinates (six cosine directors), as opposed to conventional generalized or other low-dimensional linearizing coordinates. This approach is particularly desirable due to its innate simplicity of expression and resultant comprehendibility and to the innovative simple and exact procedure used herein to initialize the filter and periodically reorthonormalize the estimated states. Various common configurations of satellites and sensors are modeled. The ramifications of parameter identification and sub-optimalization features for the filter are also discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 02, 1973
- Accession Number
- AD0778425
Entities
People
- Jeffrey Wagner
Organizations
- The Aerospace Corporation