PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-16:28:00
G02     64.3           28.5                9.6 +/-    0.84      17.4 +/-    0.84  0.090 / 0.240
G05     53.5           59.0               11.2 +/-    0.73      12.9 +/-    0.73  0.070 / 0.230
G12     184.9          27.8               15.5 +/-    2.29      28.5 +/-    2.29  0.030 / 0.040
G13     125.5          18.7               14.2 +/-    1.86      32.3 +/-    1.86  0.040 / 0.040
G15     160.3          16.5               17.3 +/-    1.99      41.6 +/-    1.99  0.030 / 0.060
G20     211.7          65.2               15.8 +/-    0.70      17.2 +/-    0.70  0.040 / 0.040
G21     276.5          23.0               12.5 +/-    1.88      25.7 +/-    1.88  0.060 / 0.110
G25     227.2          47.3               13.6 +/-    1.11      17.8 +/-    1.11  0.050 / 0.110
G29     338.7          65.4                9.4 +/-    0.63      10.2 +/-    0.63  0.120 / 0.390