PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-08:57:50
G01     126.3          12.2                4.6 +/-    3.00      12.2 +/-    3.00  0.030 / 0.030
G07     57.8           69.1                5.1 +/-    0.49       5.5 +/-    0.49  0.040 / 0.030
G08     48.7           37.0                3.4 +/-    0.79       5.2 +/-    0.79  0.280 / 0.240
G09     174.3          30.4                6.0 +/-    1.70      10.5 +/-    1.70  0.180 / 0.270
G11     115.7          36.1                6.1 +/-    1.37       9.5 +/-    1.37  0.050 / 0.040
G13     320.7          12.8                2.3 +/-    4.06       5.9 +/-    4.06  0.050 / 0.030
G17     199.4          17.3                3.5 +/-    1.74       8.3 +/-    1.74  0.110 / 0.340
G18     101.4          17.1                5.1 +/-    2.40      12.1 +/-    2.40  0.140 / 0.300
G28     276.6          52.7                5.5 +/-    4.35       6.8 +/-    4.35  0.120 / 0.220
G30     331.8          60.1                3.8 +/-    0.38       4.4 +/-    0.38  0.110 / 0.230