PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-09:12:30
G02     32.4           56.5                4.1 +/-    0.97       4.8 +/-    0.97  0.030 / 0.030
G05     143.5          59.3                6.6 +/-    0.57       7.5 +/-    0.57  0.020 / 0.030
G06     50.9           22.1                1.5 +/-    2.23       3.2 +/-    2.23  0.030 / 0.030
G12     210.3          72.4                5.1 +/-    0.76       5.4 +/-    0.76  0.030 / 0.030
G19     97.7           11.3                5.7 +/-    1.33      15.5 +/-    1.33  0.180 / 0.260
G20     199.8          19.4                3.6 +/-    2.92       8.0 +/-    2.92  0.130 / 0.240
G25     302.1          50.7                4.3 +/-    2.28       5.4 +/-    2.28  0.040 / 0.040
G29     306.1          27.7                3.5 +/-    1.53       6.5 +/-    1.53  0.040 / 0.060