PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-11:58:10
G07     317.7          52.1                2.2 +/-    0.62       2.7 +/-    0.62  0.030 / 0.020
G08     117.9          45.0                4.3 +/-    0.34       5.8 +/-    0.34  0.030 / 0.020
G09     254.4          84.1                2.8 +/-    0.23       2.8 +/-    0.23  0.030 / 0.040
G16     42.7           20.3                2.5 +/-    1.94       5.5 +/-    1.94  0.030 / 0.040
G23     148.7          59.0                3.5 +/-    0.57       4.0 +/-    0.57  0.030 / 0.030
G27     70.3           36.1                3.0 +/-    1.40       4.7 +/-    1.40  0.030 / 0.040
G28     227.5          17.8                4.3 +/-    3.11      10.0 +/-    3.11  0.100 / 0.120
G30     289.1          23.7                4.7 +/-    1.51       9.5 +/-    1.51  0.080 / 0.150