PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-16:27:40
G02     204.8          35.2               15.3 +/-    0.81      24.2 +/-    0.81  0.090 / 0.140
G06     154.5          72.2               12.5 +/-    1.15      13.1 +/-    1.15  0.130 / 0.140
G12     309.7          18.2                8.8 +/-    2.04      20.2 +/-    2.04  0.090 / 0.090
G17     41.4           44.7                9.2 +/-    0.74      12.5 +/-    0.74  0.070 / 0.100
G19     12.5           62.2               11.5 +/-    0.44      12.8 +/-    0.44  0.030 / 0.070
G24     296.5          38.4               10.8 +/-    0.62      16.2 +/-    0.62  0.030 / 0.060
G28     105.9          28.8               10.5 +/-    0.68      18.9 +/-    0.68  0.070 / 0.100