PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-07:12:50
G01     225.3          16.3                6.6 +/-    2.45      15.9 +/-    2.45  0.130 / 0.000
G03     288.6          66.1                6.2 +/-    0.69       6.7 +/-    0.69  0.290 / 0.270
G09     295.6          10.9              -11.7 +/-   17.55     -32.0 +/-   17.55  0.140 / 0.210
G14     88.4           22.0                4.0 +/-    1.06       8.4 +/-    1.06  0.420 / 0.270
G16     148.3          45.5                8.3 +/-    0.81      11.2 +/-    0.81  0.060 / 0.090
G22     212.9          70.1                5.7 +/-    0.66       6.0 +/-    0.66  0.040 / 0.100
G23     307.1          36.6                3.6 +/-    1.59       5.5 +/-    1.59  0.040 / 0.030
G26     99.2           55.0                6.5 +/-    0.90       7.8 +/-    0.90  0.030 / 0.040
G31     45.1           32.3                3.5 +/-    1.10       5.8 +/-    1.10  0.040 / 0.060