PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-13:13:00
G01     82.7           33.0                4.7 +/-    1.65       7.7 +/-    1.65  0.020 / 0.020
G07     130.8          39.9                6.2 +/-    0.43       9.1 +/-    0.43  0.030 / 0.020
G11     61.0           36.0                5.6 +/-    1.04       8.8 +/-    1.04  0.050 / 0.060
G13     286.8          37.6                6.2 +/-    1.11       9.4 +/-    1.11  0.050 / 0.060
G17     219.7          61.1                7.8 +/-    1.44       8.8 +/-    1.44  0.030 / 0.040
G18     57.1           21.9                4.2 +/-    3.32       8.7 +/-    3.32  0.040 / 0.040
G19     217.9          29.5                6.1 +/-    1.75      10.8 +/-    1.75  0.080 / 0.090
G28     0.8            61.2                4.6 +/-    0.52       5.2 +/-    0.52  0.060 / 0.090
G30     119.7          72.8                5.7 +/-    0.80       6.0 +/-    0.80  0.050 / 0.090