PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-17:12:40
G02     201.5          17.7               12.9 +/-    1.67      30.1 +/-    1.67  0.150 / 0.220
G06     170.2          54.7               11.4 +/-    0.68      13.7 +/-    0.68  0.140 / 0.300
G13     228.5          13.0               12.1 +/-    4.20      31.5 +/-    4.20  0.150 / 0.170
G17     26.0           57.4               10.3 +/-    1.27      12.0 +/-    1.27  0.210 / 0.240
G19     332.1          71.1               10.0 +/-    0.31      10.5 +/-    0.31  0.090 / 0.130
G24     311.0          28.5                9.7 +/-    1.13      17.5 +/-    1.13  0.060 / 0.120
G28     88.8           39.3                9.6 +/-    0.95      14.1 +/-    0.95  0.080 / 0.310
G30     157.8          16.2               10.0 +/-    1.85      24.2 +/-    1.85  0.120 / 0.300