NAVSPASUR Direction Cosine Processing
Abstract
The NAVSPASUR sensor is a multistatic continuous wave radar system with nine stations (three transmitters and six receivers) located along a great circle path, inclined 33.57 degrees to the equator across the southern Unites States. This report is a description of the NAVASPASUR Operations Center process of reducing the receiver station data to local direction cosines for the (new) St. Andrew's cross stations, a configuration for which most of the antennas have their phase centers aligned along north-east directions. The following observational parameters are also determined: direction cosine rates, Doppler, and chirp. Most of the main steps involved are the same as for the older cruciform stations, whose antenna phase centers are aligned along north-south and east-west axes. This algorithm has recently been modified by the Analysis and Software Department of NAVSPASUR for use with the St. Andrew's cross configuration. The direction cosine algorithm uses a walkup and least squares as before, but differs due to the antenna configuration. Those modifications were in effect by January 1, 1990, the freeze date for this report. It is hoped that the present report will elucidate the NAVSPASUR direction cosine processing for the surveillance community. A detailed error analysis of the steps involved in the direction cosine determination processing is in progress and will be issued eventually. Most of the present report will be incorporated into a longer one describing the NAVSPASUR Operations Center process of satellite element updates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1990
- Accession Number
- ADA226621
Entities
People
- Daniel Solomon