Special utilization of triaxial magnetometer measurements as prime attitude determination sensors

Details Special utilization of triaxial magnetometer measurements as prime attitude determination sensors Special utilization of triaxial magnetometer measurements as prime attitude determination sensors

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976srt..conf..209s&link_type=abstract

In: Sounding Rocket Technology Conference, 4th, Boston, Mass., June 23-25, 1976, Proceedings. (A76-35251 17-15) New York, Americ

Computer Science

Sound

Attitude Indicators, Magnetic Measurement, Magnetometers, Rocket Vehicles, Solar Sensors, Lunar Magnetic Fields, Phase Shift, Photometers, Precession

Scientific paper

Mathematical and data analyses techniques are developed to determine the attitude of a rocket whose measuring devices encounter a partial failure. These devices consist of a set of triaxial magnetometers and a lunar (solar) aspect sensor. However, for this analysis, the lunar sensor provides only the times of its measurements, not its line of sight angles. Magnetometer measurements are corrected and then used with the times of the lunar readouts and empirical lunar and magnetometer values to calculate lunar angle measurements. Standard attitude determination techniques are applied to find the elevation and azimuth of the rocket axis. Using the orientation of the rocket axis, attack angles with the lunar and magnetic field vectors are simulated. If the rocket is well behaved and an orientation of its axis can be determined during this time period, it is possible to calculate the axis of precession. An illustrative example is provided. The lunar sensor angular output was saturated for all but a few points on the lower altitude portion, but times of lunar measurements were available.

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