KSS31M型海洋重力仪动态性能的分析

采用海上实测数据对KSS31M(SN 036)海洋重力仪的阻尼延迟时间和可靠性做了分析,提出采用船只机动转向时重力数据和定位数据、厄特渥斯值的响应时间差来确定在该海况和仪器滤波系数时重力仪的阻尼延迟时间。得到的2级海况滤波系数下的阻尼延迟时间为60 s,比厂方提供的理论值更接近实际。本方法有助于提高海洋重力测量的精度。同时重力读数与厄特渥斯值变化的相位和振幅吻合,表明KSS31M海洋重力仪具有很高的可靠性和准确性。

Verifying the dynamic properties of KSS31 M marine gravity-meter by the observed gravity reading and GPS data

The observed gravity data of KSS31M marine gravity-meter and GPS data during vessel turn-manoeuvre were analyzed to verify the time delay of gravity data with reference to the EEtvEs values. The differences between the data pairs of corresponding vessel course change and gravity change indicate the actual time delay between "gravity" and the "actual position". The time delay of KSS31M marine gravity-meter derived by this way in the filter state(sea state) of 2 is about 60 seconds, better fit to actual circumstances than the theoretical time delay value suggested by the manufacturer. This method to verify the time delay of the marine gravity-meter is valuable for the accuracy of marine gravity measurement.