For the DEHP and DEP metabolites, the specific gravity ICC estimates were higher than those for creatinine-adjusted metabolites but lower than the unadjusted estimates.
For the results of the three approaches, the RMS of crossover differences of gravity disturbance estimates is approximately 1 1.5 mGal at a spatial resolution of 3.5 km (half wavelength) after crossover adjustment, and the accuracy is approximately 3 4 mGal with respect to terrestrial gravity data.
In fact, each photon pushes on the beam with 10 times the force of gravity, Painter estimates.
First and foremost, the altitude of the satellites naturally decays with time, which will produce a larger gravitational signal and, therefore, higher-quality hl-SST gravity field estimates.
Some studies, such as Nakano and Nishimura (2007), have used gravity to estimate the trades among regions.
The gravity changes estimated by the model of Ogawa and Heki (2007), which is based on elastic deformation, also turned out to be too small.
Spatial variations in the crustal density can be ignored in the following discussions because their potential contributions are more than one order of magnitude smaller than the standard deviations of the gravity trends estimated for the observed changes.
Tanaka et al. (2006) defined a "conversion coefficient from pressure head to gravity" and estimated that each contribution to the gravity change was the confined aquifer, Cconf =−6.70 and the unconfined aquifer, Cunco = 1.26 µGal/m, respectively (namely, |Cunco| is a one fifth of |Cconf| as mentioned above).
The additional computational effort is still much smaller than that of the high-accuracy approximation of gravity itself, though estimating f is faster because it is a scalar rather than a vector and because no square-root needs to be calculated.
