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               13.1 +/-    0.88      21.6 +/-    0.88  0.090 / 0.210
G07     130.8          40.5               14.8 +/-    1.10      21.4 +/-    1.10  0.090 / 0.230
G11     63.3           37.9               11.5 +/-    0.48      17.3 +/-    0.48  0.050 / 0.100
G13     287.4          37.2               12.5 +/-    1.32      19.0 +/-    1.32  0.050 / 0.100
G15     310.8          12.5               10.3 +/-    1.44      27.1 +/-    1.44  0.040 / 0.050
G17     220.3          55.2               16.9 +/-    1.08      20.1 +/-    1.08  0.040 / 0.060
G18     58.1           22.5               10.2 +/-    1.60      21.0 +/-    1.60  0.040 / 0.080
G19     217.9          31.9               15.4 +/-    0.99      25.9 +/-    0.99  0.040 / 0.070
G28     2.1            61.1               12.8 +/-    0.57      14.4 +/-    0.57  0.050 / 0.120
G30     121.7          69.4               13.6 +/-    0.72      14.5 +/-    0.72  0.040 / 0.100