PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-21:42:50
G10     253.1          27.9               20.5 +/-    2.76      37.6 +/-    2.76  0.160 / 0.300
G13     52.1           29.8               13.7 +/-    0.91      24.0 +/-    0.91  0.120 / 0.270
G15     81.3           56.9               16.5 +/-    0.65      19.3 +/-    0.65  0.080 / 0.290
G16     296.1          13.9               14.2 +/-    1.10      36.2 +/-    1.10  0.080 / 0.280
G18     273.7          57.7               19.1 +/-    0.60      22.1 +/-    0.60  0.090 / 0.120
G20     45.0           45.7               13.2 +/-    1.03      17.6 +/-    1.03  0.110 / 0.140
G21     339.2          63.2               16.4 +/-    0.75      18.2 +/-    0.75  0.030 / 0.050
G26     268.6          14.2               17.3 +/-    0.96      43.9 +/-    0.96  0.040 / 0.050
G29     163.9          42.6               21.2 +/-    1.22      29.6 +/-    1.22  0.040 / 0.060