PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-13:42:30
G01     124.8          13.2                4.2 +/-   18.83      10.9 +/-   18.83  0.050 / 0.080
G07     67.6           66.8               19.6 +/-   21.38      21.2 +/-   21.38  0.070 / 0.090
G08     48.1           35.8               -0.3 +/-   14.23      -0.5 +/-   14.23  0.180 / 0.440
G09     176.4          32.1                7.6 +/-    0.87      12.7 +/-    0.87  0.340 / 0.350
G11     112.3          35.3               13.8 +/-   11.62      21.7 +/-   11.62  0.030 / 0.030
G13     321.2          11.8                2.0 +/-   16.88       5.3 +/-   16.88  0.040 / 0.030
G17     199.5          19.5                6.8 +/-    2.48      15.0 +/-    2.48  0.030 / 0.020
G28     280.4          54.0              -21.1 +/-   52.73     -25.4 +/-   52.73  0.030 / 0.030
G30     332.9          60.3                0.2 +/-    9.72       0.2 +/-    9.72  0.180 / 0.190