PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-16:57:50
G10     250.5          25.9               17.8 +/-    2.12      34.0 +/-    2.12  0.050 / 0.040
G13     54.5           31.1               14.3 +/-    1.97      24.4 +/-    1.97  0.040 / 0.030
G15     84.5           56.7               17.1 +/-    1.00      20.0 +/-    1.00  0.030 / 0.040
G16     301.1          13.3               11.9 +/-    1.63      30.7 +/-    1.63  0.060 / 0.050
G18     270.6          57.3               15.8 +/-    1.19      18.4 +/-    1.19  0.190 / 0.390
G20     41.3           50.3               14.0 +/-    0.72      17.6 +/-    0.72  0.130 / 0.310
G21     340.2          63.2               15.1 +/-    0.56      16.8 +/-    0.56  0.120 / 0.320
G26     271.4          15.3               14.7 +/-    1.81      36.4 +/-    1.81  0.110 / 0.380
G29     162.2          44.4               17.7 +/-    0.62      24.1 +/-    0.62  0.080 / 0.140