PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-21:12:50
G10     259.3          32.5               18.9 +/-    1.96      31.6 +/-    1.96  0.130 / 0.420
G13     46.9           25.3               14.5 +/-    0.72      28.2 +/-    0.72  0.120 / 0.410
G15     69.1           53.7               15.5 +/-    0.22      18.7 +/-    0.22  0.040 / 0.050
G16     290.0          13.0               17.7 +/-    2.29      46.2 +/-    2.29  0.040 / 0.050
G18     285.9          61.5               15.2 +/-    0.65      17.0 +/-    0.65  0.050 / 0.080
G20     49.4           40.4               14.0 +/-    0.61      20.3 +/-    0.61  0.060 / 0.080
G21     350.9          68.0               15.3 +/-    1.02      16.3 +/-    1.02  0.160 / 0.550
G26     262.9          11.3               18.6 +/-    1.85      50.4 +/-    1.85  0.120 / 0.390
G27     320.7          14.3               13.5 +/-    2.09      34.2 +/-    2.09  0.110 / 0.240
G29     165.1          34.8               17.0 +/-    0.56      27.1 +/-    0.56  0.140 / 0.300