PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-14:42:40
G01     111.0          23.0               10.3 +/-    1.73      21.0 +/-    1.73  0.100 / 0.240
G07     102.0          57.8                9.9 +/-    0.67      11.5 +/-    0.67  0.090 / 0.190
G08     42.3           22.3                7.0 +/-    0.67      14.5 +/-    0.67  0.030 / 0.040
G09     174.6          16.5                9.4 +/-    0.94      22.4 +/-    0.94  0.030 / 0.030
G11     91.9           40.2                9.4 +/-    0.83      13.6 +/-    0.83  0.040 / 0.090
G13     314.0          24.1                7.7 +/-    2.97      15.4 +/-    2.97  0.040 / 0.100
G17     203.5          35.7               10.5 +/-    2.01      16.4 +/-    2.01  0.040 / 0.040
G19     207.7          10.6               -3.3 +/-    8.18      -9.0 +/-    8.18  0.030 / 0.050
G28     309.1          59.8                8.4 +/-    0.76       9.5 +/-    0.76  0.050 / 0.100
G30     358.6          73.5                8.8 +/-    1.33       9.2 +/-    1.33  0.050 / 0.090