PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-18:13:10
G02     60.8           31.9               19.5 +/-    1.87      32.8 +/-    1.87  0.060 / 0.080
G05     59.5           63.8               20.2 +/-    0.47      22.2 +/-    0.47  0.070 / 0.100
G12     185.3          31.3               25.7 +/-    1.80      43.8 +/-    1.80  0.070 / 0.090
G13     128.7          16.1               28.8 +/-    3.00      69.8 +/-    3.00  0.100 / 0.080
G15     162.9          13.1               33.5 +/-    3.20      87.3 +/-    3.20  0.110 / 0.220
G20     208.5          61.9               27.5 +/-    0.66      30.7 +/-    0.66  0.090 / 0.290
G21     272.9          19.7               17.5 +/-    1.42      38.9 +/-    1.42  0.050 / 0.040
G25     230.3          50.1               23.2 +/-    3.10      29.2 +/-    3.10  0.040 / 0.030
G29     333.4          60.3               16.4 +/-    0.38      18.5 +/-    0.38  0.030 / 0.030