PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-20:58:10
G02     58.7           34.4                9.6 +/-    0.61      15.4 +/-    0.61  0.130 / 0.390
G05     62.4           65.5               12.9 +/-    0.46      14.1 +/-    0.46  0.170 / 0.430
G12     184.7          31.6               16.6 +/-    1.54      28.2 +/-    1.54  0.050 / 0.100
G13     129.6          15.3               18.9 +/-    2.79      46.5 +/-    2.79  0.060 / 0.100
G15     164.8          11.4               18.6 +/-   31.90      50.4 +/-   31.90  0.040 / 0.050
G20     207.0          61.6               16.6 +/-    0.78      18.6 +/-    0.78  0.040 / 0.050
G21     271.3          17.8               15.2 +/-    2.17      35.3 +/-    2.17  0.030 / 0.060
G25     228.9          50.5               15.6 +/-    0.95      19.6 +/-    0.95  0.030 / 0.050
G29     330.5          57.3               10.8 +/-    0.71      12.6 +/-    0.71  0.030 / 0.040