Determination of Height Anomalies from GOCE+EGM08+RTM Combined Model
Technical Division of Surveying and Mapping, 36 Xiying Road,Xi’an 710054,China
Abstract According to the deficiency existing in the EGM08 global gravity field model, a combined model is presented in this paper. The low and medium frequencies bands of the EGM08 model are substituted by a GOCE geopotential model, and very ultra-high frequencies signals are extended by a residual terrain model RTM. Simulant analyses show that the precision of height anomalies is widely improved by GOCE model, and the RTM’s contribution to height anomalies cannot be ignored. The GPS/leveling benchmarks tests show that the GOCE model’s contribution to height anomalies is up to 43%, and RTM’s contribution is 1 cm.
Key words ：
geopotential model
GOCE+EGM08+RTM
SRTM
time-wise approach
direct approach
Received: 02 September 2014
Published: 10 October 2015
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