PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-07:42:40
G02     353.9          77.8                1.6 +/-    0.33       1.6 +/-    0.33  0.040 / 0.080
G05     163.7          34.0                4.7 +/-    1.88       7.5 +/-    1.88  0.050 / 0.090
G06     40.6           43.8                1.5 +/-    1.15       2.1 +/-    1.15  0.030 / 0.030
G12     312.0          69.4                1.7 +/-    0.41       1.8 +/-    0.41  0.030 / 0.030
G17     86.2           11.8                5.0 +/-    3.03      13.3 +/-    3.03  0.090 / 0.120
G19     75.7           26.7                2.1 +/-    1.10       4.0 +/-    1.10  0.090 / 0.080
G24     229.3          23.0                5.2 +/-    2.97      10.7 +/-    2.97  0.100 / 0.100
G25     317.4          28.5                1.2 +/-    0.94       2.2 +/-    0.94  0.160 / 0.090