PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-17:12:30
G02     38.4           51.2               18.7 +/-    0.86      23.3 +/-    0.86  0.050 / 0.040
G05     136.8          65.8               20.4 +/-    0.71      22.2 +/-    0.71  0.040 / 0.050
G06     57.1           12.6               14.9 +/-    1.49      39.3 +/-    1.49  0.030 / 0.030
G12     194.7          61.2               20.6 +/-    1.16      23.1 +/-    1.16  0.030 / 0.030
G20     199.2          32.7               23.3 +/-    1.40      38.7 +/-    1.40  0.090 / 0.140
G25     282.6          58.5               15.5 +/-    0.96      17.8 +/-    0.96  0.100 / 0.170
G29     313.9          36.5               13.9 +/-    1.33      21.4 +/-    1.33  0.030 / 0.030