PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-16:42:30
G10     245.1          21.1               17.1 +/-    3.07      36.7 +/-    3.07  0.040 / 0.050
G13     61.4           34.3               14.5 +/-    1.41      23.3 +/-    1.41  0.030 / 0.040
G15     98.3           57.0               17.8 +/-    0.82      20.7 +/-    0.82  0.030 / 0.040
G16     307.5          12.7               11.9 +/-    2.75      31.3 +/-    2.75  0.050 / 0.050
G18     260.9          53.0               15.7 +/-    2.49      19.1 +/-    2.49  0.170 / 0.260
G20     36.2           56.2               14.3 +/-    0.85      16.8 +/-    0.85  0.260 / 0.400
G21     331.0          58.7               14.4 +/-    0.92      16.5 +/-    0.92  0.130 / 0.350
G26     277.9          17.4               14.1 +/-    1.55      33.2 +/-    1.55  0.140 / 0.360
G29     159.8          51.9               17.4 +/-    0.58      21.4 +/-    0.58  0.060 / 0.100