PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-16:28:10
G10     265.9          37.0                9.7 +/-    1.11      14.9 +/-    1.11  0.120 / 0.130
G13     42.8           20.0                7.1 +/-    2.64      15.6 +/-    2.64  0.100 / 0.220
G15     59.0           48.1                7.0 +/-    0.70       9.0 +/-    0.70  0.210 / 0.260
G16     284.4          11.4                8.9 +/-    1.57      24.0 +/-    1.57  0.140 / 0.240
G18     302.6          65.2                8.4 +/-    0.86       9.1 +/-    0.86  0.060 / 0.100
G20     52.7           37.6                5.3 +/-    0.89       8.0 +/-    0.89  0.040 / 0.080
G21     17.7           73.2                7.5 +/-    0.88       7.8 +/-    0.88  0.220 / 0.360
G24     122.1          13.5               11.6 +/-    2.42      29.9 +/-    2.42  0.210 / 0.410
G27     318.3          19.4                7.7 +/-    1.57      17.3 +/-    1.57  0.030 / 0.030
G29     165.9          27.7                9.7 +/-    1.04      17.8 +/-    1.04  0.030 / 0.030