PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:12:50
G01     104.4          27.0               11.4 +/-    1.43      21.3 +/-    1.43  0.130 / 0.170
G07     110.6          56.7               13.1 +/-    0.30      15.4 +/-    0.30  0.150 / 0.220
G08     42.1           20.6                8.5 +/-    2.17      18.5 +/-    2.17  0.030 / 0.040
G09     174.6          11.6               17.0 +/-    1.30      45.9 +/-    1.30  0.030 / 0.030
G11     86.7           43.2               12.0 +/-    1.70      16.6 +/-    1.70  0.070 / 0.110
G13     307.6          30.0               11.9 +/-    1.02      20.9 +/-    1.02  0.060 / 0.090
G17     208.0          37.0               15.8 +/-    1.10      24.2 +/-    1.10  0.070 / 0.130
G18     77.9           24.7               10.4 +/-    1.30      20.5 +/-    1.30  0.060 / 0.120
G28     323.9          61.4               11.3 +/-    0.65      12.7 +/-    0.65  0.030 / 0.050
G30     43.8           79.1               12.5 +/-    0.82      12.7 +/-    0.82  0.030 / 0.060