PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-19:27:50
G10     254.7          29.2               12.4 +/-    1.09      22.0 +/-    1.09  0.130 / 0.400
G13     50.4           28.4               10.3 +/-    0.79      18.7 +/-    0.79  0.060 / 0.080
G15     76.4           55.6               13.6 +/-    0.35      16.1 +/-    0.35  0.070 / 0.080
G16     295.9          13.3               12.0 +/-    1.57      31.0 +/-    1.57  0.040 / 0.050
G18     277.8          59.5               13.3 +/-    1.39      15.2 +/-    1.39  0.040 / 0.050
G20     45.6           45.1               12.4 +/-    0.69      16.7 +/-    0.69  0.090 / 0.260
G21     344.5          65.3               11.6 +/-    0.82      12.6 +/-    0.82  0.110 / 0.310
G26     268.5          13.3               12.4 +/-    1.25      32.1 +/-    1.25  0.090 / 0.170
G27     322.0          10.3              -15.4 +/-   18.39     -42.7 +/-   18.39  0.110 / 0.180
G29     163.4          38.9               15.5 +/-    0.64      23.0 +/-    0.64  0.100 / 0.270