PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-20:42:50
G01     102.4          27.9               12.8 +/-    0.87      23.4 +/-    0.87  0.250 / 0.150
G07     113.2          55.2               12.7 +/-    0.84      15.1 +/-    0.84  0.250 / 0.240
G08     42.1           20.1                9.4 +/-    1.89      20.7 +/-    1.89  0.070 / 0.040
G09     174.4          10.2               16.2 +/-    3.04      44.9 +/-    3.04  0.090 / 0.050
G11     84.8           43.3               13.0 +/-    0.95      17.9 +/-    0.95  0.060 / 0.130
G13     306.1          31.0               11.3 +/-    1.10      19.5 +/-    1.10  0.070 / 0.140
G17     209.1          37.9               13.3 +/-    1.12      20.1 +/-    1.12  0.030 / 0.010
G18     76.0           24.8               12.2 +/-    1.74      23.9 +/-    1.74  0.030 / 0.010
G28     328.0          61.6               10.9 +/-    0.69      12.2 +/-    0.69  0.030 / 0.010
G30     58.6           79.0               11.7 +/-    1.05      11.9 +/-    1.05  0.030 / 0.010