| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
|---|
| Outline of Final Research Achievements |
In this study, we aimed to monitor circulation of planetary atmosphere as time-varying gravity field by satellite gravimetry. We improved the software, which was originally developed for precise estimation of the Earth-rotating satellite orbit and the earth's gravity field, so that it can be used for the orbit simulation to monitor temporal gravity field change accompanying planetary atmosphere variation. We focused on Mars atmosphere, analyzed the atmospheric circulation model for about 9 years, and extracted atmospheric surface pressure, dry ice, water ice, dust, annual, semi-annual, seasonal fluctuation components. Then these components are converted to the observed value from gravity measurement satellites. Using these data sets, we conducted simulation of the gravity field observation. Some parameters, such as measurement method, satellite's orbit and observation period, were changed and optimized in the simulation for more efficient observation.
|
