PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-22:57:50
G02     71.6           24.7                9.7 +/-    0.69      19.2 +/-    0.69  0.070 / 0.110
G05     46.2           49.0               10.2 +/-    1.18      13.0 +/-    1.18  0.070 / 0.100
G12     180.9          14.7               12.8 +/-    4.15      32.0 +/-    4.15  0.100 / 0.140
G13     115.4          26.3               13.5 +/-    1.19      25.6 +/-    1.19  0.080 / 0.160
G15     156.5          24.5               13.8 +/-    1.37      27.2 +/-    1.37  0.030 / 0.030
G18     223.8          14.2               14.2 +/-    3.47      36.0 +/-    3.47  0.030 / 0.030
G20     225.6          80.3               13.0 +/-    1.13      13.2 +/-    1.13  0.170 / 0.370
G21     284.6          27.4               10.8 +/-    1.43      20.0 +/-    1.43  0.140 / 0.350
G25     212.8          35.7               13.3 +/-    1.47      20.9 +/-    1.47  0.040 / 0.050
G29     343.1          73.3               12.4 +/-    0.59      12.9 +/-    0.59  0.040 / 0.060