PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-11:27:50
G02     26.7           61.4                5.2 +/-    0.67       5.9 +/-    0.67  0.040 / 0.030
G05     152.0          53.6                9.2 +/-    0.37      11.1 +/-    0.37  0.030 / 0.030
G06     47.7           27.7                3.3 +/-    2.40       6.0 +/-    2.40  0.250 / 0.310
G12     228.0          76.9                6.8 +/-    0.46       7.0 +/-    0.46  0.150 / 0.220
G19     93.5           14.2                7.0 +/-    3.21      17.7 +/-    3.21  0.030 / 0.020
G20     198.8          15.6                5.3 +/-    2.01      13.1 +/-    2.01  0.020 / 0.020
G25     307.4          47.2                4.9 +/-    1.69       6.4 +/-    1.69  0.080 / 0.100
G29     302.9          25.2                3.8 +/-    1.18       7.5 +/-    1.18  0.070 / 0.140