起伏飞行在航空重力测量的应用研究

The application of the rise-and-fall flight to the aerial gravity measurement

从理论上分析了起伏飞行测量对GT航空重力测量的影响程度;为了有效地验证起伏飞行的测量效果,开展平坦地形、起伏地形下的一系列缓起伏飞行测试,并分别对GT-2A直升机、固定翼航空重力缓起伏飞行测量结果进行了评价;测试结果表明:采用坡度不超过3.0°(爬升率约1/20)的缓起伏飞行方法是可行的,其重复测量内符合精度均小于0.7 m Gal,满足了高精度测量的要求。

In this paper,theoretical analysis is made for the influence extent of the rise-and-fall flight on the GT aerial gravity measurement. In order to verify the measurement effect of the rise-and- fall flight,the authors carried out a series of tests on smooth rise-andfall flight,and made evaluation on the results of aerial gravity smooth rise-and- fall flying measurement performed by GT-2A helicopter and fixed wing helicopter respectively. The results show that the adoption of smooth rise-and-fall flight under the condition of slope not in excess of 3. 0°（ rate-of-climb about 1 /20） is feasible. The coincidence precisions of repeated measurements are exclusively less than 0. 7 m Gal,thus meeting the requirements of the high-precision measurement.