The Potential for Observing African Weather with GNSS Remote Sensing

Table 3

Comparison of ZTD estimation using different orbit products (the ZTD estimates obtained using IGS final orbits were used as reference to compute the other result) (after [33]).

Orbit type	RMS (mm)	Standard deviation (mm)	Mean difference (mm)	Maximum difference (mm)	Minimum difference (mm)
IGS rapid	0.185	0.180	−0.079	0.870	−1.860
IGS ultrarapid	1.876	1.832	−0.185	29.435	−19.560
JPL 15 min	1.549	1.511	−0.197	9.435	−11.560