PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-16:57:50
G01     126.0          12.6               12.7 +/-    2.12      33.4 +/-    2.12  0.040 / 0.050
G07     56.0           69.5               14.4 +/-    0.66      15.3 +/-    0.66  0.040 / 0.050
G08     50.4           40.2               13.0 +/-    0.91      18.9 +/-    0.91  0.030 / 0.040
G09     177.9          34.4               15.2 +/-    1.41      24.5 +/-    1.41  0.030 / 0.040
G11     117.6          35.9               14.0 +/-    0.87      21.9 +/-    0.87  0.040 / 0.030
G13     320.8          12.7               13.4 +/-    2.13      35.1 +/-    2.13  0.030 / 0.040
G17     201.0          14.0               14.0 +/-    1.04      35.6 +/-    1.04  0.040 / 0.070
G18     102.8          17.3               13.1 +/-    1.35      30.8 +/-    1.35  0.040 / 0.070
G28     278.8          53.7               16.1 +/-    1.23      19.4 +/-    1.23  0.120 / 0.270
G30     335.5          62.1               14.1 +/-    0.57      15.7 +/-    0.57  0.140 / 0.320