PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-18:12:30
G02     37.3           52.3               11.0 +/-    1.21      13.5 +/-    1.21  0.040 / 0.040
G05     140.3          65.1               12.7 +/-    0.53      13.9 +/-    0.53  0.030 / 0.050
G06     56.9           12.5                8.3 +/-    1.13      21.8 +/-    1.13  0.030 / 0.040
G12     194.6          61.6               12.7 +/-    0.44      14.3 +/-    0.44  0.030 / 0.040
G20     198.9          32.4               13.6 +/-    1.09      22.7 +/-    1.09  0.110 / 0.180
G25     282.8          58.8                9.5 +/-    1.22      10.9 +/-    1.22  0.070 / 0.150
G29     313.0          35.3                8.6 +/-    1.36      13.5 +/-    1.36  0.020 / 0.030