Study and implementation of the precise temperature control used in airborne gravimetry

Temperature was a main factor that influenced and restricted an improvement of quartzose flexible accelerometer´s performance. To assure measurement accuracy of the Strapdown Gravimeter for airborne Survey (SG-A01), a stable temperature environment which changes were less than ±0.02°C was needed for the specific force measure system which was composed of three orthogonal accelerometers. To meet the requirement mentioned above, a method that contained two-stage temperature control system was brought forward to assure precision of temperature control. A series of static test shown that the method can reach the precision preliminarily.