Geomagnetic exploration in China Seismo-Electromagnetic Satellite (CSES) mission
Abstract
With the exploration of the near Earth magnetic field, the internal structure of Earth, the Earth geomagnetic distribution and spatial environment can be studied. CSES will be the first Chinese satellite of this kind in a near Earth orbit. Its scientific goal is the real-time monitoring of electromagnetic changes by studying the Earth system, especially the ionosphere and other spheres' mutual actions. The magnetic field is one of the most important physical parameters for monitoring the ionosphere. And the High Precision Magnetometer (HPM) will be responsible for the accurate measurement of magnetic field vector components from DC to 15Hz in orbit. Considered the magnetic environment of the spacecraft and the vector value accuracy requirement for magnetic field detection. The HPM consists of two fluxgate sensors and a CDSM scalar sensor. The fluxgate sensors will provide the vector components of the magnetic field but with limited accuracy and long-term stability. The CDSM sensor measures the scalar of the magnetic field with high accuracy and stability and will be therefore used to calibrate the vector data. With the help of two fluxgate sensors, the satellite remanence magnetic interference can be reduced. Several ground data processing methods used to get the real accuracy vector magnetic field data have been considered, include the physical calibration of the single sensor, the absolutely vector correction algorithm, the remanence magnetic interference elimination and coordination conversion method. And several ground calibration tests have been operated to get the real excellent performances of each sensor.The CSES will be launched in early 2018, after several month's in orbit operation, it will be a good opportunities to show the geomagnetic data get by CSES-HPM to all attendants during the COSPAR.
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E.614C