PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-01:43:10
G02     326.5          81.1                7.8 +/-    0.41       7.9 +/-    0.41  0.050 / 0.060
G05     165.1          29.7                9.8 +/-    1.38      17.2 +/-    1.38  0.050 / 0.040
G06     40.6           44.9                6.7 +/-    0.95       9.1 +/-    0.95  0.030 / 0.030
G12     317.2          65.8                9.4 +/-    0.62      10.2 +/-    0.62  0.040 / 0.040
G17     80.2           18.4                7.4 +/-    2.28      17.0 +/-    2.28  0.100 / 0.120
G19     70.0           31.0                7.1 +/-    2.45      12.1 +/-    2.45  0.100 / 0.090
G24     232.5          26.2               11.0 +/-    1.45      20.9 +/-    1.45  0.210 / 0.130
G25     317.8          23.5                7.8 +/-    1.66      15.8 +/-    1.66  0.160 / 0.130