PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-21:27:50
G10     260.4          33.3               17.0 +/-    1.70      27.8 +/-    1.70  0.090 / 0.060
G13     46.1           24.5               12.8 +/-    2.16      25.3 +/-    2.16  0.110 / 0.090
G15     67.3           53.1               15.3 +/-    0.37      18.6 +/-    0.37  0.040 / 0.040
G16     288.7          12.8               13.1 +/-    0.91      34.5 +/-    0.91  0.040 / 0.040
G18     288.1          62.0               15.0 +/-    1.17      16.8 +/-    1.17  0.170 / 0.320
G20     50.3           39.4               13.3 +/-    0.79      19.6 +/-    0.79  0.150 / 0.320
G21     353.0          68.7               14.4 +/-    0.77      15.4 +/-    0.77  0.110 / 0.220
G26     261.7          10.8               16.8 +/-    2.30      46.2 +/-    2.30  0.110 / 0.230
G27     320.3          15.3               11.5 +/-    2.19      28.3 +/-    2.19  0.090 / 0.180
G29     165.3          33.6               18.8 +/-    1.04      30.6 +/-    1.04  0.160 / 0.130