PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-21:27:50
G02     89.6           9.6                15.5 +/-    1.28      43.7 +/-    1.28  0.100 / 0.270
G05     45.4           30.4              -13.1 +/-    8.13     -22.7 +/-    8.13  0.110 / 0.230
G13     90.8           36.5               16.7 +/-    0.99      25.8 +/-    0.99  0.080 / 0.050
G15     138.2          44.5               20.8 +/-    0.64      28.2 +/-    0.64  0.040 / 0.070
G18     236.9          33.8               20.0 +/-    1.27      32.5 +/-    1.27  0.060 / 0.070
G20     17.9           75.5               16.4 +/-    0.37      16.8 +/-    0.37  0.160 / 0.160
G21     304.2          41.4               15.2 +/-    1.15      21.6 +/-    1.15  0.140 / 0.150
G25     201.4          16.6               21.0 +/-    1.72      50.3 +/-    1.72  0.050 / 0.030
G26     300.3          18.9               11.6 +/-    0.68      26.3 +/-    0.68  0.050 / 0.030
G29     139.9          79.8               15.8 +/-    0.30      16.0 +/-    0.30  0.020 / 0.020