^4fA High Precision Inertial Navigation System Applied for Airborne Gravimetry

摘要

^7fThe major difference between static and dynamic gravimeter operation is the occurrence of kinematic accelerations. Especialiy for airborne gravimetry, where aircrafts are used as test-platforms, vertical kinematic accelerations play the key role with regard to precision and resolution and therefore have a major influence on possible deployments. The effect of aircraft manoeuvres, air turbulence and aircraft's reaction on gravity anomalies will be described in this paper and the specific influence on precision and resolution of wavelength will be discussed. The compensation of the aircraft's dynamic vertical acceleration as well as the establishment of requirements concerning resolution and dynamic characteristic of a deployed altitude sensor will be presented as the paper's key element. The high aim for in-flight gravimetry is to measure the planet's field of gravity precise within 1 mGal~4 at a lateral resolution of 1 km. The corresponding sensor resolution of 0.1 mm in altitude at an air speed of 50 ms~(-1) is a strong requirement. This submission will show that it can be met, if the technical opportunities are consequently taken.