PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-18:27:40
G01     120.0          17.3               14.4 +/-    1.17      33.8 +/-    1.17  0.040 / 0.080
G07     77.1           67.4               13.2 +/-    0.38      14.2 +/-    0.38  0.050 / 0.090
G08     46.3           34.9               11.8 +/-    0.43      18.8 +/-    0.43  0.090 / 0.280
G09     177.3          27.3               15.7 +/-    1.10      29.1 +/-    1.10  0.120 / 0.300
G11     109.6          39.5               15.4 +/-    0.54      22.6 +/-    0.54  0.040 / 0.100
G13     318.2          18.4               12.1 +/-    1.96      27.8 +/-    1.96  0.040 / 0.090
G17     202.6          20.4               16.8 +/-    1.23      36.7 +/-    1.23  0.040 / 0.060
G18     95.7           20.5               13.5 +/-    0.97      29.3 +/-    0.97  0.040 / 0.050
G28     291.4          57.1               14.3 +/-    0.68      16.7 +/-    0.68  0.080 / 0.190
G30     347.5          68.6               12.4 +/-    0.64      13.2 +/-    0.64  0.080 / 0.200