PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-14:12:30
G02     249.1          77.9                7.3 +/-    0.79       7.5 +/-    0.79  0.060 / 0.060
G05     173.1          16.5               12.3 +/-    1.96      29.5 +/-    1.96  0.040 / 0.040
G06     39.9           58.0                6.5 +/-    0.59       7.5 +/-    0.59  0.160 / 0.160
G12     321.3          53.8                8.3 +/-    1.45      10.0 +/-    1.45  0.090 / 0.130
G17     74.6           18.7                6.2 +/-    0.96      14.0 +/-    0.96  0.180 / 0.240
G19     61.4           35.5                5.9 +/-    0.84       9.4 +/-    0.84  0.150 / 0.280
G24     244.4          33.6                7.9 +/-    0.91      12.8 +/-    0.91  0.090 / 0.130
G25     317.3          16.5                5.4 +/-    2.15      12.9 +/-    2.15  0.080 / 0.130