摘要 为检验和评价LCRⅡ型航空重力仪的精度和性能，与LCRⅠ型航空重力仪进行了同机飞行试验。试验结果表明，Ⅱ型与Ⅰ型航空重力仪相比，采样点重力异常之差值的标准差为4.0×
10 -5 ms -2，单套重力仪的测量精度约为2.8×10 -5 ms -2;5′×5′格网平均重力异常之差的标准差为4.9×10 -5 ms -2，每套系统获得的5′×5′格网平均重力异常的精度为3.5×10 -5 ms -2，剔除两个可疑值后，精度为2.9×10 -5 ms -2。总体上，LCRⅡ型航空重力仪与Ⅰ型精度相当，但具有更快的仪器稳定速度。
Abstract： In order to validate the accuracy and the performance of the LaCoste & Romberg (LCRⅡ), a concurrent flight test over a mountain area was undertaken.The LCR gravimeter Ⅱ and an LCR gravimeter Ⅰ system side by side. The results of the flight test show that the standard deviation of the gravity anomalies difference measured with the two systems is about 4.0×10 -5 ms -2 namely the accuracy of the single system is about 2.8×10 -5 ms -2 if we assumed the two systems have the same accuracy. They also indicate that the standard deviation of the 5′×5′ grid mean gravity anomalies difference from the two systems is about 4.9×10 -5 ms -2 namely the related accuracy of the single system is about 3.5×10 -5 ms -2 and 2.9×10 -5 ms -2 after two outliers were eliminated. In general, LCR gravimeter Ⅱ system has the identical accuracy as the LCR gravimeter Ⅰ system, but it can be quickly leveling off.
