PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-08:27:50
G02     243.9          76.2                5.5 +/-    0.41       5.7 +/-    0.41  0.090 / 0.090
G05     172.5          15.8                3.1 +/-    2.51       7.6 +/-    2.51  0.090 / 0.090
G06     40.0           59.9                5.4 +/-    0.71       6.1 +/-    0.71  0.040 / 0.030
G12     321.3          51.7                4.4 +/-    0.76       5.4 +/-    0.76  0.030 / 0.040
G17     72.6           19.6                2.9 +/-    2.91       6.6 +/-    2.91  0.160 / 0.210
G19     55.9           39.9                4.7 +/-    1.59       6.8 +/-    1.59  0.170 / 0.280
G24     239.4          33.9                6.4 +/-    2.46      10.4 +/-    2.46  0.030 / 0.030
G25     316.7          18.3                3.4 +/-    2.39       7.9 +/-    2.39  0.030 / 0.020