PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-13:42:30
G02     31.2           57.5                4.2 +/-    0.52       4.9 +/-    0.52  0.030 / 0.040
G05     147.9          58.3                7.0 +/-    0.69       8.1 +/-    0.69  0.020 / 0.030
G06     51.0           21.7                2.2 +/-    0.52       4.5 +/-    0.52  0.070 / 0.200
G12     209.4          72.2                5.3 +/-    0.46       5.6 +/-    0.46  0.070 / 0.150
G19     98.0           10.7                7.2 +/-    1.46      19.9 +/-    1.46  0.030 / 0.030
G20     198.7          21.7                5.8 +/-    1.99      12.2 +/-    1.99  0.030 / 0.020
G25     300.8          52.1                5.0 +/-    0.82       6.1 +/-    0.82  0.030 / 0.050
G29     307.7          30.4                3.9 +/-    1.07       6.7 +/-    1.07  0.050 / 0.050