PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-17:27:50
G02     37.7           51.8               11.3 +/-    0.53      13.9 +/-    0.53  0.050 / 0.050
G05     138.7          65.3               13.9 +/-    0.53      15.2 +/-    0.53  0.040 / 0.050
G06     56.8           12.9                9.2 +/-    0.79      24.1 +/-    0.79  0.030 / 0.050
G12     195.0          61.9               13.7 +/-    0.83      15.3 +/-    0.83  0.040 / 0.060
G20     199.1          32.2               13.8 +/-    1.22      23.1 +/-    1.22  0.080 / 0.150
G25     283.6          58.4               12.5 +/-    1.16      14.4 +/-    1.16  0.070 / 0.170
G29     313.3          35.8               10.8 +/-    1.48      16.8 +/-    1.48  0.030 / 0.040