DEVELOPMENT AND APPLICATION OF AIRBORNE GRAVIMETRY--UTILIZATION OF KINEMATIC GPS METHOD

1. 巡航船cm定位实验与海面高度/大地水准面测量在海洋研究所天井丸号上同时安装了3台GPS接收机。东京大学的研究人员对这艘船进行了三维定位，并测量了海面高度。试验于1995年11月13日至11月25日进行。从3个GPS天线的定位可以确定船舶的三维运动。陆地上的GPS基站安置在海洋研究所、东京大学和防灾研究所。京都大学。通过这次测量，确定了相模湾和纪宜半岛以东的大地水准面。在飞机上进行了陀螺罗经GPS定位与试验。这架飞机是CESNA 402。第一次试验于1995年12月8日至11日进行。在这个实验中，在飞机上安装了GPS接收器和陀螺罗盘。重力仪没有安装。调查区域为濑户岛海，机场为姚。完成了OSAKA.4次飞行，取得了良好的定位效果。对最初用于航海的陀螺罗经的试验证明，陀螺不适合飞机使用。需要一个新的替代品。在CESNA 402号船上安装了AirA重力仪上的重力测量装置，1996年1月25日至27日对重力测量进行了测试。安装的重力仪是一种改良的NIPR-ORI2，最初用于海洋用途。对重力仪的垂直陀螺仪进行了调整，以更好地适应空中使用。但效果不太好。重力测量结果不理想，建议使用激光陀螺仪，减少飞机的机械振动。

1. cm positioning experiment and measurement of sea surface height/geoid on board a cruising vessel3 GPS receivers were installed at the same time on board Tansei-Maru of the Ocean Research Institute. University of Tokyo, to coduct a 3-dimensional positionings of the ship and to measure sea surface height. The experiment was carried out from 13 November to 25 November, 1995. From the positionings of 3 GPS antennas a 3-dimensional motion of the ship can be determined. The GPS base stations on land were settled at the Ocean Research Institute, University of Tokyo and the Disaster Prevention Research Institute. Kyoto University. By this measurement the geoid at Sagami Bay and east of Kii Peninsula was determined2.GPS Positioning and Test of Gyro Compass on board an airplaneActual experiments using an airplane were conducted. The airplane is CESNA 402. The first test was carried on 8-11 December 1995. In this experiment GPS receivers and a gyrocompass were installed on board the airplane. The gravimeter was not installed. The survey area is the Seto Island Sea and the airport is Yao. OSAKA.4 flights were done and obtained a good gpspositioning results. Test of gyrocompass which was originally for marine use proved that the gyro did not suit airplane use. requiring a new substitute.3.Gravity Measurement on the AirA gravimeter was installed on board CESNA 402 and gravity measurement was tested from 25 to 27 January 1996. The gravimeter installed was a modified NIPR-ORI2 which is originally for marine use. The vertical gyroscope of the gravimeter was adjusted to better match the airborne use. but it did not work so well. The measurement of gravity showed an unsatisfactory result, suggesting the use of a laser gyroscope and the decrease of mechanical vibrations of the airplane.