PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-08:43:00
G08     117.9          45.1                6.9 +/-    0.95       9.3 +/-    0.95  0.100 / 0.160
G09     246.8          84.3                3.9 +/-    0.51       3.9 +/-    0.51  0.110 / 0.200
G16     42.6           21.9                3.1 +/-    1.80       6.4 +/-    1.80  0.030 / 0.040
G23     149.0          59.2                6.5 +/-    0.30       7.5 +/-    0.30  0.030 / 0.030
G27     70.1           36.1                3.5 +/-    0.60       5.4 +/-    0.60  0.060 / 0.080
G28     227.5          18.1                3.3 +/-    3.27       7.7 +/-    3.27  0.040 / 0.080
G30     289.7          24.5                5.2 +/-    1.66      10.3 +/-    1.66  0.110 / 0.190