PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-21:42:40
G10     253.1          27.9               20.6 +/-    1.96      37.7 +/-    1.96  0.050 / 0.060
G13     52.1           29.8               13.2 +/-    1.20      23.3 +/-    1.20  0.050 / 0.070
G15     81.3           56.9               16.9 +/-    0.97      19.8 +/-    0.97  0.070 / 0.120
G16     296.1          13.9               13.2 +/-    1.83      33.7 +/-    1.83  0.070 / 0.120
G18     273.7          57.7               16.4 +/-    1.86      19.0 +/-    1.86  0.120 / 0.370
G20     45.0           45.7               14.2 +/-    0.80      19.0 +/-    0.80  0.160 / 0.480
G21     339.2          63.2               17.1 +/-    0.79      18.9 +/-    0.79  0.030 / 0.060
G26     268.6          14.2               16.4 +/-    1.68      41.7 +/-    1.68  0.050 / 0.060
G29     163.9          42.6               20.0 +/-    0.80      27.9 +/-    0.80  0.040 / 0.040