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

1.在一艘巡航船上进行100厘米定位实验和测量海面高度/大地水准面3个全球定位系统接收器同时安装在海洋研究所的Tansei Maru号船上。东京大学，以coduct三维定位的船舶和测量海面高度。实验于1995年11月13日至11月25日进行。根据3个GPS天线的定位，可以确定船舶的三维运动。陆地上的全球定位系统基站设在海洋研究所、东京大学和防灾研究所。京都大学。通过这次测量，确定了相模湾和纪伊半岛东部的大地水准面。2.飞机上的GPS定位和陀螺罗盘的测试使用飞机进行了实际实验。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，GPS接收器和陀螺罗盘被安装在飞机上。重力仪没有安装。调查区域为濑户岛海，机场为瑶。进行了OSAKA.4的飞行试验，取得了良好的GPS定位效果。对原船用陀螺罗经的试验证明，陀螺不适合飞机使用。3.在空中进行重力测量CESNA 402上安装了一台重力仪，并于1996年1月25日至27日进行了重力测量试验。安装的重力仪是一台改进的NIPR-ORI 2，最初是用于海洋的。重力仪的垂直陀螺仪进行了调整，以更好地配合机载使用。但效果不太好重力测量结果不令人满意，这表明使用了激光陀螺仪，并减少了飞机的机械振动。

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.