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Table 4 Validation of ZHD computed by Saastamoinen formula using ERA5 and GPT3 pressure data

From: Assessment of GNSS zenith tropospheric delay responses to atmospheric variables derived from ERA5 data over Nigeria

GNSS stations

Model

RMS (mm)

\(R^{2}\)

ABUZ

ERA5

2.3086

0.7336

 

GPT3

3.3963

0.4235

BJCO

ERA5

2.1029

0.7533

 

GPT3

2.9737

0.5067

BKFP

ERA5

2.3359

0.8164

 

GPT3

4.1656

0.4163

FUTY

ERA5

2.2488

0.7565

 

GPT3

3.8187

0.2978

OSGF

ERA5

2.3077

0.6891

 

GPT3

2.7921

0.5448

UNEC

ERA5

2.3722

0.7552

 

GPT3

3.1424

0.5705

AVERAGE

ERA5

2.2794

0.7507

 

GPT3

3.3815

0.4599

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