PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-10:43:00
G01     115.8          20.1                5.6 +/-    1.02      12.3 +/-    1.02  0.170 / 0.360
G07     91.5           62.5                4.4 +/-    0.57       4.9 +/-    0.57  0.130 / 0.290
G08     43.4           26.7                3.5 +/-    1.95       6.6 +/-    1.95  0.040 / 0.030
G09     175.0          20.8                5.3 +/-    1.19      11.5 +/-    1.19  0.030 / 0.030
G11     100.0          39.8                6.2 +/-    0.53       9.1 +/-    0.53  0.030 / 0.020
G13     317.0          20.2                2.9 +/-    0.99       6.4 +/-    0.99  0.030 / 0.020
G17     201.9          30.5                5.6 +/-    1.35       9.7 +/-    1.35  0.100 / 0.220
G28     300.1          58.7                2.5 +/-    1.01       2.9 +/-    1.01  0.100 / 0.210
G30     350.4          70.3                4.1 +/-    0.62       4.3 +/-    0.62  0.110 / 0.110