PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/11-13:12:40
G01     87.3           32.3                5.5 +/-    1.72       9.1 +/-    1.72  0.020 / 0.030
G07     127.7          43.3                7.3 +/-    0.67      10.1 +/-    0.67  0.030 / 0.030
G11     64.9           38.0                6.7 +/-    0.84      10.0 +/-    0.84  0.050 / 0.060
G13     291.5          36.9               10.4 +/-    1.87      15.9 +/-    1.87  0.040 / 0.060
G17     216.1          57.2                8.5 +/-    1.18       9.9 +/-    1.18  0.060 / 0.110
G18     60.8           23.0                5.2 +/-    1.70      10.6 +/-    1.70  0.050 / 0.100
G19     215.9          26.0                6.8 +/-    2.27      13.0 +/-    2.27  0.100 / 0.100
G28     353.4          61.6                6.0 +/-    0.55       6.8 +/-    0.55  0.080 / 0.090
G30     109.4          75.8                7.3 +/-    0.53       7.5 +/-    0.53  0.080 / 0.170