PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-22:27:40
G10     286.9          47.4               15.3 +/-    1.16      20.0 +/-    1.16  0.040 / 0.050
G15     47.9           34.8               13.0 +/-    0.69      20.8 +/-    0.69  0.040 / 0.050
G18     341.6          66.9               15.4 +/-    0.93      16.6 +/-    0.93  0.080 / 0.220
G20     66.6           22.3               12.7 +/-    1.29      26.3 +/-    1.29  0.080 / 0.180
G21     73.9           76.1               17.0 +/-    0.90      17.5 +/-    0.90  0.090 / 0.150
G24     106.3          23.4               19.2 +/-    0.91      38.9 +/-    0.91  0.080 / 0.150
G27     305.9          31.8               13.9 +/-    1.68      23.5 +/-    1.68  0.070 / 0.200
G29     166.8          10.5               23.3 +/-    3.58      64.4 +/-    3.58  0.080 / 0.230
G32     208.9          22.6               19.8 +/-    2.66      40.9 +/-    2.66  0.060 / 0.120