PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-20:43:00
G01     82.7           33.1               12.5 +/-    1.75      20.5 +/-    1.75  0.140 / 0.210
G07     130.8          40.5               14.1 +/-    0.97      20.3 +/-    0.97  0.120 / 0.230
G11     63.3           37.9               11.9 +/-    1.59      18.0 +/-    1.59  0.120 / 0.230
G13     287.4          37.2               14.4 +/-    1.43      22.0 +/-    1.43  0.210 / 0.380
G15     310.8          12.5               10.7 +/-    2.43      28.2 +/-    2.43  0.040 / 0.110
G17     220.3          55.2               16.6 +/-    1.28      19.7 +/-    1.28  0.050 / 0.080
G18     58.1           22.5               10.1 +/-    1.64      20.9 +/-    1.64  0.030 / 0.030
G19     217.9          31.9               15.9 +/-    1.49      26.7 +/-    1.49  0.030 / 0.030
G28     2.1            61.1               12.1 +/-    0.43      13.7 +/-    0.43  0.030 / 0.060
G30     121.7          69.4               14.6 +/-    0.81      15.5 +/-    0.81  0.050 / 0.070