PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-17:27:50
G02     70.9           23.4               14.2 +/-    0.51      28.9 +/-    0.51  0.020 / 0.040
G05     47.4           51.4               12.9 +/-    0.42      16.0 +/-    0.42  0.030 / 0.040
G12     182.9          19.2               14.4 +/-    1.60      32.4 +/-    1.60  0.040 / 0.040
G13     118.3          24.3               15.6 +/-    1.11      30.9 +/-    1.11  0.050 / 0.050
G15     155.7          23.4               15.5 +/-    1.06      31.4 +/-    1.06  0.090 / 0.160
G18     222.5          13.5               10.1 +/-    1.55      26.1 +/-    1.55  0.070 / 0.190
G20     220.6          74.8               15.2 +/-    0.89      15.7 +/-    0.89  0.090 / 0.360
G21     283.4          27.7               12.9 +/-    2.11      23.7 +/-    2.11  0.070 / 0.250
G25     218.5          39.8               16.8 +/-    2.07      24.6 +/-    2.07  0.050 / 0.080
G29     347.6          73.4               15.1 +/-    0.63      15.7 +/-    0.63  0.050 / 0.090