PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-17:57:40
G02     25.1           62.0               15.2 +/-    0.62      16.9 +/-    0.62  0.040 / 0.050
G05     156.7          53.3               16.3 +/-    0.70      19.8 +/-    0.70  0.040 / 0.050
G06     50.4           21.6               12.1 +/-    3.01      25.6 +/-    3.01  0.030 / 0.030
G12     212.6          74.4               13.9 +/-    0.96      14.3 +/-    0.96  0.020 / 0.030
G19     95.8           12.1               14.6 +/-    1.65      38.9 +/-    1.65  0.280 / 0.220
G20     197.6          20.4               16.3 +/-    2.99      35.4 +/-    2.99  0.230 / 0.240
G25     302.7          52.1               13.8 +/-    3.37      17.0 +/-    3.37  0.040 / 0.040
G29     304.3          26.2               13.6 +/-    1.19      25.8 +/-    1.19  0.030 / 0.040