PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-13:27:50
G01     115.1          20.5                8.5 +/-    1.47      18.4 +/-    1.47  0.140 / 0.180
G07     93.9           61.2                7.9 +/-    0.47       8.9 +/-    0.47  0.150 / 0.190
G08     43.2           26.0                6.7 +/-    2.22      12.9 +/-    2.22  0.040 / 0.020
G09     174.8          20.1                8.2 +/-    2.48      18.0 +/-    2.48  0.040 / 0.030
G11     98.1           39.6                7.8 +/-    0.90      11.5 +/-    0.90  0.030 / 0.030
G13     316.6          20.8                5.1 +/-    1.68      10.9 +/-    1.68  0.030 / 0.030
G17     202.1          31.3                9.0 +/-    1.05      15.3 +/-    1.05  0.130 / 0.480
G28     301.0          58.7                5.0 +/-    1.06       5.7 +/-    1.06  0.110 / 0.280
G30     349.8          70.2                6.2 +/-    1.01       6.6 +/-    1.01  0.110 / 0.150