JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 S (固体地球科学) » S-GD 測地学

[S-GD01] [EE] Geodetic Technologies, Networks and Strategies for Global Geodetic Observing System (GGOS)

2017年5月24日(水) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:川畑 亮二(国土交通省国土地理院)、Michael R Pearlman(Center for Astrophysics)、若杉 貴浩(国土交通省国土地理院)

[SGD01-P05] SLR monthly gravity solutions using the C5++ software

*松尾 功二1大坪 俊通2 (1.国土地理院、2.一橋大学)

キーワード:Time-variable gravity, Satellite Laser Ranging, Space geodesy

This study presents monthly gravity solutions up to degree and order 4 for the period 1993-2015 derived by Satellite Laser Ranging (SLR) data using the C5++ software [Otsubo et al., 1994]. Here, we apply the following modifications to the previous solutions by Matsuo et al. (2013). First, Range bias is estimated for per station and per satellite. Secondly, station coordinates are solved for using no-net-rotation constraints. Thirdly, non-tidal effects for atmosphere, ocean, hydrology are corrected using geophysical fluid models. Last, one-per-rev empirical accelerations are estimated in along-track and cross-track. Consequently, our new SLR solutions exhibited better consistency with those from Gravity Recovery And Climate Experiment (GRACE) than the previous solutions in the degree 3 and 4 components. The improvements of SLR gravity solutions provides further insight into the mass variability of the earth prior to the launch of GRACE in 2002.