PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-23:28:10
G02     227.4          70.7               13.1 +/-    0.65      13.8 +/-    0.65  0.030 / 0.060
G05     173.4          11.3               15.3 +/-   43.47      41.5 +/-   43.47  0.030 / 0.070
G06     43.7           64.5               11.5 +/-    0.54      12.6 +/-    0.54  0.140 / 0.250
G12     321.1          45.7               11.2 +/-    1.04      15.0 +/-    1.04  0.130 / 0.300
G17     63.7           29.2                9.8 +/-    0.43      17.4 +/-    0.43  0.040 / 0.050
G19     49.1           44.0               11.3 +/-    0.91      15.5 +/-    0.91  0.030 / 0.050
G24     252.6          38.2               14.2 +/-    0.91      21.2 +/-    0.91  0.060 / 0.100