초록 ▼

A system and method for determining the roll rate and roll angle of a spinning platform, using the measured phase differences between the GPS satellite signals received on two or more antennas. The measured phase differences and the navigation solution from a GPS receiver are processed in a Kalman f

A system and method for determining the roll rate and roll angle of a spinning platform, using the measured phase differences between the GPS satellite signals received on two or more antennas. The measured phase differences and the navigation solution from a GPS receiver are processed in a Kalman filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines, in which the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength.

대표청구항 ▼

We claim: 1. A system for determining the roll rate and roll angle of a spinning platform comprising:a plurality of antennas for receiving GPS signals from at least one satellite, each antenna outputting an antenna signal for each received signal;a signal combiner for receiving the antenna signals a

We claim: 1. A system for determining the roll rate and roll angle of a spinning platform comprising:a plurality of antennas for receiving GPS signals from at least one satellite, each antenna outputting an antenna signal for each received signal;a signal combiner for receiving the antenna signals and outputting combined antenna signals;a GPS receiver processor for forming the navigation solution with the combined antenna signals; anda roll processor, for correlating each of the antenna signals separately, measuring the phase differences between the correlated signals from pairs of antennas, and processing the measured phase differences and navigation solution in a roll filter that outputs roll rate and roll angle, said roll filter including roll rate and roll angle as filter state variables.