PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-12:12:50
G10     265.0          36.5                6.1 +/-    1.24       9.4 +/-    1.24  0.130 / 0.360
G13     43.1           20.4                2.0 +/-    1.74       4.3 +/-    1.74  0.200 / 0.480
G15     59.9           48.6                4.8 +/-    0.99       6.2 +/-    0.99  0.110 / 0.140
G16     282.6          12.2                4.8 +/-    1.17      12.6 +/-    1.17  0.100 / 0.170
G20     50.3           41.0                3.3 +/-    0.93       4.7 +/-    0.93  0.050 / 0.080
G21     6.4            71.9                4.9 +/-    0.54       5.1 +/-    0.54  0.050 / 0.070
G24     122.6          13.0                4.2 +/-    1.57      10.9 +/-    1.57  0.090 / 0.340
G27     318.9          18.4                3.0 +/-    0.91       6.8 +/-    0.91  0.110 / 0.350
G29     166.9          31.2                6.8 +/-    1.96      11.6 +/-    1.96  0.040 / 0.080