PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-06:58:00
G03     192.2          21.0                7.7 +/-    4.52      16.4 +/-    4.52  0.030 / 0.020
G07     293.5          40.0                7.0 +/-    3.05      10.2 +/-    3.05  0.040 / 0.020
G08     138.1          30.3                8.3 +/-    0.83      14.4 +/-    0.83  0.220 / 0.220
G09     321.0          66.9                6.6 +/-    0.67       7.1 +/-    0.67  0.120 / 0.240
G16     42.6           40.9                4.7 +/-    1.06       6.7 +/-    1.06  0.070 / 0.080
G23     117.3          79.8                6.8 +/-    0.67       6.9 +/-    0.67  0.120 / 0.070
G26     43.7           13.7                2.6 +/-    1.72       6.6 +/-    1.72  0.040 / 0.060
G27     95.7           34.3                7.3 +/-    1.13      11.7 +/-    1.13  0.060 / 0.090
G30     274.5          12.8                7.9 +/-    2.31      20.8 +/-    2.31  0.100 / 0.120