PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-16:27:40
G02     61.4           30.9                9.6 +/-    0.86      16.6 +/-    0.86  0.050 / 0.050
G05     58.0           62.3                9.7 +/-    0.50      10.8 +/-    0.50  0.040 / 0.050
G12     185.6          31.5               11.8 +/-    1.25      20.1 +/-    1.25  0.060 / 0.100
G13     128.4          16.2               15.6 +/-    2.04      37.7 +/-    2.04  0.070 / 0.110
G15     162.3          13.6               13.6 +/-    1.72      34.9 +/-    1.72  0.020 / 0.030
G20     209.1          61.3               14.0 +/-    1.11      15.7 +/-    1.11  0.020 / 0.030
G25     231.6          50.2               11.9 +/-    2.04      14.9 +/-    2.04  0.070 / 0.190
G29     335.2          61.7                9.0 +/-    0.41      10.1 +/-    0.41  0.070 / 0.250