PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-15:12:50
G02     72.8           21.3                8.1 +/-    1.43      17.2 +/-    1.43  0.040 / 0.050
G05     46.4           48.0                8.6 +/-    0.69      11.1 +/-    0.69  0.030 / 0.030
G12     182.8          17.9               10.5 +/-    1.87      24.5 +/-    1.87  0.130 / 0.170
G13     116.4          25.5               14.0 +/-    1.25      27.0 +/-    1.25  0.170 / 0.150
G15     154.0          25.4               15.9 +/-    2.13      30.7 +/-    2.13  0.130 / 0.220
G18     223.3          15.8                9.3 +/-    2.18      22.7 +/-    2.18  0.160 / 0.210
G20     224.2          75.5               10.9 +/-    0.50      11.2 +/-    0.50  0.050 / 0.030
G21     285.8          30.2                9.0 +/-    1.83      15.7 +/-    1.83  0.040 / 0.040
G25     218.3          38.6               10.3 +/-    2.21      15.3 +/-    2.21  0.060 / 0.140
G29     351.1          75.4                8.5 +/-    0.43       8.8 +/-    0.43  0.090 / 0.150