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1. Spectral evaluation of Earth geopotential models and an experiment on its regional improvement for geoid modelling

Author:
B EROL
Source:
Journal of earth system science 2012 v.121 no.3 pp. 823-835
ISSN:
0253-4126
Subject:
monitoring; Earth system science; models; gravity; spectral analysis; case studies; algorithms; satellites; Turkey (country)
Abstract:
... As the number of Earth geopotential models (EGM) grows with the increasing number of data collected by dedicated satellite gravity missions, CHAMP, GRACE and GOCE, measuring the differences among the models and monitoring the improvements in gravity field recovery are required. This study assesses the performance of recent EGMs derived from CHAMP, GRACE, and other data in comparison to the earlier ...
DOI:
10.1007/s12040-012-0190-x

2. Toward calibration of regional groundwater models using GRACE data

Author:
Alexander Y. Sun; Ronald Green; Sean Swenson; Matthew Rodell
Source:
Journal of hydrology 2012 v.422-423 no. pp. 1-9
ISSN:
0022-1694
Subject:
plateaus; planning; monitoring; uncertainty; valleys; aquifers; gravity; population growth; satellites; hydrologic models; system optimization; problem solving; groundwater; algorithms; climate; Texas
Abstract:
... Regional groundwater models are increasingly used for short- and long-term water resources planning, in anticipation of greater climate variability and population growth. However, many of these models are subject to structural and parametric uncertainties because of the lack of field measurements. In recent years, the Gravity Recovery and Climate Experiment (GRACE) satellite mission has shown grea ...
DOI:
10.1016/j.jhydrol.2011.10.025

3. Elimination of the impact of vessels on ocean wave height inversion with X-band wave monitoring radar

Author:
Li Wang; Xiongbin Wu; Ketao Ma; Yun Tian; Yuejun Fei
Source:
Chinese journal of oceanology and limnology 2016 v.34 no.5 pp. 1114-1121
ISSN:
0254-4059
Subject:
algorithms; geometry; gravity; models; monitoring; oceans; radar; statistical analysis; water waves
Abstract:
... Directional wave spectra and integrated wave parameters can be derived from X-band radar sea surface images. A vessel on the sea surface has a significant influence on wave parameter inversions that can be seen as intensive backscatter speckles in X-band wave monitoring radar sea surface images. A novel algorithm to eliminate the interference of vessels in ocean wave height inversions from X-band ...
DOI:
10.1007/s00343-016-5075-4