A statistical comparison has been made between gravity field parameters derived from different global geopotential models (GGMs) and observed gravity anomalies, gravimetric geoid and GPS-Leveling data.
Fig. 9 (a) Calculated and observed gravity anomalies for line SPr2.
c The observed gravity changes (g0) obtained after standard corrections of tides, polar motion and the barometric effect.
Gray and thick solid lines are observed gravity, gobs(t), and estimated total gravity, gcal(t), respectively.
The ideal situation would be to have observed gravity at the GPS/levelling points to avoid interpolation errors.
But observed gravity changes include the uncertainty of the reference station, and we cannot separate this uncertainty using relative gravity measurement.
(b) Thin, gray and thick lines are estimated drift component, gd(t), observed gravity, gobs(t) and estimated total gravity, gcal(t), respectively.
(p. 196)." The fact that Fairbank believed in the existence of fractional electrical charges, or that Weber strongly believed that he had observed gravity waves, does not make them right.
Observed gravity data at the benchmark points would improve the accuracy of rigorous orthometric height determination.
(g) Average of the estimated soil moisture 0 1 m below the ground surface (solid line), with 1-σ error range of observed gravity (gray area) and observed daily precipitation (gray bar).
The estimated gravity response of rainfall with the conversion coefficients prepared by Tanaka et al. (2006) was in good agreement to the observed gravity variation, even though the observation environments differed from those of Tanaka et al. (2006).
