PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-11:12:40
G01     111.8          22.7                4.9 +/-    2.04      10.1 +/-    2.04  0.110 / 0.130
G07     99.8           59.6                8.0 +/-    1.27       9.1 +/-    1.27  0.110 / 0.140
G08     42.4           23.0                2.7 +/-    1.77       5.5 +/-    1.77  0.030 / 0.040
G09     174.3          16.5                5.3 +/-    1.22      12.6 +/-    1.22  0.040 / 0.040
G11     94.1           40.7                7.8 +/-    0.45      11.2 +/-    0.45  0.030 / 0.020
G13     314.6          23.3                2.6 +/-    0.92       5.3 +/-    0.92  0.030 / 0.020
G17     203.3          35.0                7.7 +/-    0.98      12.2 +/-    0.98  0.070 / 0.070
G28     308.4          59.9                5.0 +/-    0.80       5.7 +/-    0.80  0.070 / 0.070
G30     359.7          73.6                6.8 +/-    1.05       7.1 +/-    1.05  0.080 / 0.190