PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-19:28:10
G10     262.1          34.5               16.4 +/-    1.18      26.2 +/-    1.18  0.120 / 0.260
G13     45.0           23.1               11.3 +/-    1.35      23.1 +/-    1.35  0.130 / 0.190
G15     64.1           51.4               14.2 +/-    0.33      17.6 +/-    0.33  0.040 / 0.080
G16     288.5          12.1               16.9 +/-    2.17      44.9 +/-    2.17  0.040 / 0.090
G18     292.7          63.3               14.1 +/-    0.67      15.6 +/-    0.67  0.040 / 0.050
G20     51.0           38.9               11.9 +/-    0.93      17.6 +/-    0.93  0.040 / 0.050
G21     359.9          70.4               15.3 +/-    1.06      16.2 +/-    1.06  0.110 / 0.470
G26     261.4          9.9                14.4 +/-    2.85      40.2 +/-    2.85  0.110 / 0.450
G27     319.8          16.6               12.7 +/-    2.15      30.3 +/-    2.15  0.270 / 0.520
G29     164.9          30.4               17.4 +/-    1.19      30.2 +/-    1.19  0.190 / 0.490