PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/12-13:27:50
G02     260.6          77.8                5.7 +/-    0.35       5.9 +/-    0.35  0.200 / 0.270
G05     172.5          19.3                5.5 +/-    1.13      12.3 +/-    1.13  0.190 / 0.230
G06     39.9           51.2                5.2 +/-    0.80       6.4 +/-    0.80  0.110 / 0.100
G12     321.1          60.9                4.7 +/-    1.14       5.3 +/-    1.14  0.100 / 0.120
G17     77.2           16.6                5.6 +/-    1.63      13.4 +/-    1.63  0.030 / 0.030
G19     60.8           37.7                6.7 +/-    1.02      10.1 +/-    1.02  0.030 / 0.030
G24     235.0          30.2                7.6 +/-    1.90      13.3 +/-    1.90  0.040 / 0.030
G25     317.4          21.0                3.5 +/-    2.33       7.6 +/-    2.33  0.030 / 0.030