PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/10-17:57:50
G07     42.4           69.9               13.1 +/-    1.13      13.8 +/-    1.13  0.030 / 0.050
G08     54.5           44.2               11.2 +/-    0.80      15.3 +/-    0.80  0.040 / 0.060
G09     178.8          39.4               16.3 +/-    1.54      23.9 +/-    1.54  0.080 / 0.150
G11     122.6          33.3               15.0 +/-    0.93      24.6 +/-    0.93  0.090 / 0.130
G18     106.9          15.2               13.8 +/-    1.47      34.3 +/-    1.47  0.050 / 0.080
G28     272.3          51.6               13.7 +/-    1.55      16.9 +/-    1.55  0.050 / 0.070
G30     331.2          59.1               10.9 +/-    0.89      12.5 +/-    0.89  0.030 / 0.040