PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-15:28:00
G02     249.9          77.6               12.6 +/-    0.39      12.8 +/-    0.39  0.270 / 0.210
G05     173.6          16.4               17.5 +/-    1.37      42.1 +/-    1.37  0.110 / 0.210
G06     40.0           56.6               16.4 +/-    0.38      19.2 +/-    0.38  0.030 / 0.040
G12     321.3          54.8                9.8 +/-    0.86      11.7 +/-    0.86  0.040 / 0.040
G17     75.2           18.2               10.7 +/-    0.92      24.5 +/-    0.92  0.090 / 0.130
G19     62.1           35.0               10.0 +/-    1.64      15.9 +/-    1.64  0.130 / 0.130
G24     243.8          33.3               13.2 +/-    2.15      21.6 +/-    2.15  0.080 / 0.110
G25     317.4          17.7                9.8 +/-    1.99      22.9 +/-    1.99  0.080 / 0.130