PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-10:27:50
G01     60.7           30.2                4.4 +/-    1.52       7.8 +/-    1.52  0.070 / 0.130
G07     140.9          22.4                4.5 +/-    3.11       9.3 +/-    3.11  0.100 / 0.120
G11     49.4           27.0                1.5 +/-    2.09       2.7 +/-    2.09  0.030 / 0.030
G13     263.4          36.9                6.1 +/-    2.67       9.3 +/-    2.67  0.020 / 0.030
G15     296.1          15.9                5.1 +/-    1.63      12.5 +/-    1.63  0.090 / 0.080
G17     246.8          73.2                6.0 +/-    0.45       6.3 +/-    0.45  0.100 / 0.090
G18     42.8           13.7                1.0 +/-    2.64       2.6 +/-    2.64  0.150 / 0.360
G19     229.9          51.1                5.9 +/-    3.44       7.3 +/-    3.44  0.150 / 0.400
G28     19.3           60.2                4.0 +/-    2.80       4.5 +/-    2.80  0.050 / 0.060
G30     142.9          56.0                5.6 +/-    0.49       6.6 +/-    0.49  0.040 / 0.060