PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-20:27:50
G02     62.6           31.0               20.5 +/-    0.59      35.1 +/-    0.59  0.090 / 0.360
G05     56.1           62.5               20.8 +/-    0.50      23.1 +/-    0.50  0.120 / 0.290
G12     184.1          27.3               24.5 +/-    1.83      45.4 +/-    1.83  0.060 / 0.120
G13     126.2          18.3               26.4 +/-    2.04      60.5 +/-    2.04  0.060 / 0.130
G15     162.1          15.1               31.0 +/-    1.42      76.9 +/-    1.42  0.040 / 0.060
G20     210.0          66.3               23.9 +/-    1.07      25.8 +/-    1.07  0.040 / 0.090
G21     275.0          20.7               20.9 +/-    2.67      45.1 +/-    2.67  0.040 / 0.030
G25     224.4          47.0               22.7 +/-    2.29      29.8 +/-    2.29  0.030 / 0.060
G29     334.2          62.0               20.9 +/-    0.33      23.3 +/-    0.33  0.040 / 0.050