通过结合高低卫星对卫星跟踪数据和卫星激光测距来弥合GRACE和GRACE跟踪之间的差距
Matthias Weigelt1,2, Adrian Jäggi3, Ulrich Meyer3
1Institute for Satellite Geodesy and Inertial Sensing, German Aerospace Center (DLR), Callinstraße 30b, 30167 Hanover, Germany.
Journal of geodesy
|September 16, 2024
概括
本研究引入了一种新方法,以弥合来自GRACE和GRACE后续卫星任务的全球大众运输观测数据缺口. 该技术确保了不间断的时间序列,改善了我们对地球的理解.
科学领域:
- 地球科学 地球科学 地球科学
- 地质物理学 地质物理学
- 卫星地质测量 卫星地质测
背景情况:
- 格雷斯和格雷斯后续任务对于观察全球大众运输至关重要.
- 在GRACE和GRACE后续研究之间存在数据差距,阻碍了持续的观察.
- 结合来自多个处理中心的解决方案 (COST-G) 旨在提高重力场数据质量.
研究的目的:
- 开发一种中间技术,以弥合GRACE和GRACE后续任务之间的数据差距.
- 为了创建一个连续的,不间断的时间序列的每月重力场解决方案.
- 为了能够比较和交叉验证两个任务时期的数据.
主要方法:
- 结合高低卫星到卫星跟踪 (HL-SST) 使用GPS与卫星激光测距 (SLR).
- HL-SST提供更高的空间分辨率,而SLR则有助于低度重力场信息.
- 从2003年到2022年,生成了一个完整的重力场解决方案系列,填补了数据空白.
主要成果:
- 从2003年到2022年,创建了一个不间断的全球大众运输观测时间序列.
- 该技术以每月的间隔实现了大约700公里的空间分辨率.
- 估计了Fennoscandia和北美冰川同静调整信号,显示与GRACE/GRACE-FO数据的高相关性.
结论:
- 开发的中间技术成功弥合了数据缺口,提供了地球质量运输的连续记录.
- 该方法允许无集成和比较来自GRACE和GRACE后续的数据.
- 这种方法增强了可变时间重力场数据在地物理应用中的实用性.
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