PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-14:42:40
G01     109.2          24.1                8.6 +/-    1.92      17.2 +/-    1.92  0.090 / 0.190
G07     104.9          56.5                8.0 +/-    0.63       9.4 +/-    0.63  0.070 / 0.170
G08     42.0           20.7                6.7 +/-    0.96      14.4 +/-    0.96  0.030 / 0.030
G09     174.3          14.8               10.7 +/-    2.03      26.7 +/-    2.03  0.030 / 0.030
G11     89.4           40.4                9.9 +/-    0.78      14.3 +/-    0.78  0.060 / 0.120
G13     312.8          25.3                9.1 +/-    2.27      17.7 +/-    2.27  0.040 / 0.090
G17     204.2          37.6                8.4 +/-    2.76      12.7 +/-    2.76  0.090 / 0.250
G19     208.1          12.2                5.7 +/-   13.34      15.1 +/-   13.34  0.090 / 0.250
G28     312.8          60.3               10.3 +/-    0.87      11.6 +/-    0.87  0.090 / 0.200
G30     3.6            75.0                9.4 +/-    0.68       9.7 +/-    0.68  0.070 / 0.170