PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-21:43:00
G10     267.3          37.6               15.7 +/-    1.53      23.7 +/-    1.53  0.120 / 0.060
G13     42.4           19.5               12.1 +/-    2.27      27.0 +/-    2.27  0.050 / 0.070
G15     58.9           48.6               14.9 +/-    0.79      19.1 +/-    0.79  0.040 / 0.030
G16     282.3          11.1               14.0 +/-    1.17      38.1 +/-    1.17  0.040 / 0.030
G18     302.1          64.6               14.4 +/-    0.75      15.8 +/-    0.75  0.160 / 0.260
G20     55.0           34.2               13.8 +/-    1.36      22.2 +/-    1.36  0.120 / 0.250
G21     8.7            72.9               14.7 +/-    0.91      15.3 +/-    0.91  0.290 / 0.250
G24     121.1          14.2               19.7 +/-    1.83      50.1 +/-    1.83  0.160 / 0.210
G27     317.5          20.6               13.5 +/-    1.73      29.3 +/-    1.73  0.180 / 0.200
G29     166.3          26.6               18.0 +/-    1.02      33.9 +/-    1.02  0.130 / 0.210