PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-12:42:50
G01     110.0          23.7                5.6 +/-    1.41      11.2 +/-    1.41  0.030 / 0.030
G07     103.4          57.8                5.3 +/-    0.71       6.1 +/-    0.71  0.030 / 0.030
G08     42.1           21.3                4.2 +/-    1.23       8.9 +/-    1.23  0.030 / 0.040
G09     173.6          14.3                6.7 +/-    1.18      16.8 +/-    1.18  0.030 / 0.040
G11     91.0           40.7                6.3 +/-    0.77       9.1 +/-    0.77  0.110 / 0.230
G13     313.4          24.7                6.2 +/-    2.19      12.1 +/-    2.19  0.080 / 0.250
G17     203.9          37.0                6.5 +/-    2.53       9.9 +/-    2.53  0.060 / 0.090
G19     208.0          11.6                2.8 +/-    8.80       7.6 +/-    8.80  0.060 / 0.100
G28     311.9          60.2                4.7 +/-    0.82       5.3 +/-    0.82  0.080 / 0.180
G30     3.4            74.8                5.5 +/-    0.47       5.7 +/-    0.47  0.070 / 0.150