PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-14:57:40
G01     83.5           32.9               10.7 +/-    1.10      17.7 +/-    1.10  0.030 / 0.020
G07     130.3          40.6               10.9 +/-    0.80      15.8 +/-    0.80  0.030 / 0.030
G11     62.1           36.8               11.2 +/-    1.10      17.2 +/-    1.10  0.030 / 0.060
G13     287.7          37.5               12.6 +/-    1.11      19.1 +/-    1.11  0.040 / 0.050
G15     313.2          10.7               -5.3 +/-   19.90     -14.5 +/-   19.90  0.080 / 0.230
G17     219.3          59.1               11.9 +/-    1.50      13.6 +/-    1.50  0.090 / 0.220
G18     58.0           22.3                9.7 +/-    1.70      20.2 +/-    1.70  0.050 / 0.110
G19     217.5          29.5               11.6 +/-    2.60      20.6 +/-    2.60  0.060 / 0.110
G28     359.9          61.2               11.1 +/-    1.03      12.5 +/-    1.03  0.060 / 0.080
G30     118.8          72.6               12.5 +/-    0.68      13.0 +/-    0.68  0.070 / 0.100