Slide 1

Statistical Comparison Between Available Geoid Height Models and 13-Point GPS on BM Profile Along NW Puerto Rico Shoreline

0.73

2.07

EGM96

0.04

2.53

CARIB97

0.04

2.34

GEOID99

St. Dev. (m)

Average (m)

Geoid Height Model


	While EGM96 has a lower bias, the scatter of the residual geoid height signal is much larger.
	Both CARIB97 and GEOID99 provide similar results – differing only by a bias value.
	Also note that the usual fitting technique involves more than removing a bias. It takes local trends into account.
	As insufficient data exists in Puerto Rico, no such model has yet been developed.
	Expansion of the existing set of stations will likely create an opportunity for a hybrid geoid model similar to the mainland model (i.e., a “hybrid” geoid).