Attitude determination of the antarctic sounding rockets from magnetometer and horizon aspect sensor data.

Abstract

Attitudes of the antarctic sounding rockets S-310JA-11 and S-310JA-12 launched from Syowa Station were determined from magnetometer and horizon aspect sensor data. The spin rate, precessional coning angle, and period determined for the S-310JA-11 and S-310JA-12 rockets were 0.57 and 0.59 rps, 8.8 and 25.0 degrees, and 308 and 292 seconds, respectively.

Preliminary results of rocket attitude and auroral green line emission rate in the DELTA campaign

“…As a natural consequence, the mag-angles by GAH and GAX show similar behavior as the spin-axis zenith angles by HOS and SFF, respectively. By combining information obtained by the horizon and magnetic sensors, it is possible to solve the absolute direction of the spin-axis (Tohyama et al, 1988). This is a procedure to find out 2 intersecting points of 2 small circles in the sky.…”

Magnetic Field Measurement (MFM) and Sun Aspect Sensor (SAS)

“…If three different sensors give the tip angles, the orientation of the rocket axis can be determined with an unambiguous solution. However, the use of only two different sensors is preferred, though it produces two-solution ambiguities, since one solution can be eliminated by physical arguments, and economy of space and cost is significant (Tohyama et al, 1988).…”

Intense auroral field-aligned currents and electrojets detected by rocket-borne fluxgate magnetometer.

“…The orientations of the coning center have been determined from the magnetometer and horizon aspect sensor data. The determined orientations have errors within f 10•‹ and •}5•‹ in the azimuthal and elevational angles, respectively (TOHYAMA et al,1988). These errors have influence on the base lines of NB, WB and UB.…”