PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/10-10:58:00
G07     317.4          51.9                3.6 +/-    0.73       4.4 +/-    0.73  0.030 / 0.020
G08     117.7          45.1                6.6 +/-    0.86       8.8 +/-    0.86  0.020 / 0.020
G09     245.1          84.4                4.6 +/-    0.36       4.6 +/-    0.36  0.070 / 0.130
G16     42.7           20.6                3.2 +/-    2.64       7.0 +/-    2.64  0.100 / 0.180
G23     148.9          59.0                6.6 +/-    0.51       7.6 +/-    0.51  0.030 / 0.040
G27     70.1           36.1                4.3 +/-    0.98       6.7 +/-    0.98  0.040 / 0.040
G28     227.6          18.0                4.2 +/-    2.96       9.8 +/-    2.96  0.030 / 0.040
G30     289.4          24.0                5.1 +/-    1.79      10.2 +/-    1.79  0.030 / 0.040