TETHERED SATELLITE-BASED HIGH PRECISION MAGNETIC FIELD MEASUREMENT TECHNIQUES

摘要

As the developing of science, geomagnetic survey is applied quite widely. It's an exigent need to gain accurate results of geomagnetic survey. Geomagnetic is a vector field, which needs multidimensional observations to reduce the possibilities of the earth physics explanation. This paper design a constellation scheme, which is composed of five tethered formation units, one contains two satellites connected with a tether. One of the units local at the 550km equator circular orbit, the rest local at the 450km near-polar orbit. The geomagnetic survey payloads are fixed on the stretching structure on the two satellites in a formation by the super optical platform. The simulation shows that the scheme can gain accurate data of geomagnetic survey. The mode of the tethered formation keeps the payloads away from the electromagnetism disturbing of the satellite platform; further, it can achieve graduation information of the geomagnetic. In the geomagnetic survey from space, the use of constellation and tethered formation can greatly improve spatial resolution and separate the variation of time and space. Moreover, we can obtain the global geomagnetic information more quickly to separate the geomagnetic field of the interior and exterior source.