PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-16:43:00
G02     200.5          15.3               10.2 +/-    2.18      25.2 +/-    2.18  0.140 / 0.190
G06     170.1          51.0                9.4 +/-    0.51      11.7 +/-    0.51  0.160 / 0.220
G13     230.0          15.7               11.5 +/-    2.32      28.1 +/-    2.32  0.100 / 0.120
G17     17.1           62.9                7.9 +/-    0.72       8.7 +/-    0.72  0.070 / 0.130
G19     299.5          70.1                7.4 +/-    1.04       7.8 +/-    1.04  0.200 / 0.400
G24     311.8          27.8                7.3 +/-    1.29      13.4 +/-    1.29  0.180 / 0.330
G28     83.2           42.0                9.1 +/-    1.06      12.8 +/-    1.06  0.040 / 0.040
G30     156.9          19.2                9.1 +/-    2.42      20.4 +/-    2.42  0.040 / 0.060