High Altitude Navigation System Study. Volume VI. System Performance Demonstration Report.

The studies conducted under this phase O HANS Study contract evaluated the performance of a Passive Ranging Interferometer Sensor (PRAIS) when used for autonomous navigation of high altitude spacecraft. The autonomous navigation system investigated consisted of the PRAIS, a digital computer and an Attitude Determination System (ADS). Performance of this HANS is five orbits encompassing a range of orbital altitudes from 400 to 150,000 nm was evaluated using covariance analysis for the trade studies and parametric sensitivity analyses. HANS performance in a synchronous equatorial orbit and highly eccentric (Molniya) orbit was demonstrated via a Monte Carlo simulation using order statistics.
See also Volume 5 dated Mar 75, AD-A008 486.