PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-13:42:50
G01     93.3           30.2                7.6 +/-    1.00      13.2 +/-    1.00  0.040 / 0.050
G07     122.6          44.9                8.4 +/-    0.93      11.3 +/-    0.93  0.040 / 0.050
G08     42.0           13.1                5.2 +/-    2.77      13.4 +/-    2.77  0.040 / 0.050
G11     72.6           41.9                6.8 +/-    0.93       9.6 +/-    0.93  0.040 / 0.060
G13     297.9          35.8                9.0 +/-    2.84      14.1 +/-    2.84  0.060 / 0.060
G17     211.5          46.6                8.7 +/-    0.87      11.4 +/-    0.87  0.050 / 0.080
G18     66.5           24.1                6.8 +/-    1.20      13.6 +/-    1.20  0.050 / 0.070
G19     212.0          25.0                7.9 +/-    1.28      15.5 +/-    1.28  0.040 / 0.060
G28     328.5          60.9                6.4 +/-    0.43       7.2 +/-    0.43  0.230 / 0.220
G30     93.3           77.4                7.6 +/-    0.47       7.8 +/-    0.47  0.100 / 0.210