PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/21-18:12:30
G10     253.1          29.1               10.9 +/-    1.40      19.4 +/-    1.40  0.040 / 0.050
G13     50.9           27.9                9.3 +/-    0.86      17.0 +/-    0.86  0.040 / 0.050
G15     86.4           59.0               11.5 +/-    0.64      13.2 +/-    0.64  0.210 / 0.560
G16     292.9          15.3                7.9 +/-    3.31      19.6 +/-    3.31  0.140 / 0.580
G20     273.8          52.7               12.6 +/-    0.64      15.4 +/-    0.64  0.070 / 0.140
G21     339.3          62.8               11.0 +/-    0.50      12.2 +/-    0.50  0.070 / 0.180
G26     265.9          14.3               10.0 +/-    1.80      25.3 +/-    1.80  0.030 / 0.040
G29     165.1          46.7               13.0 +/-    0.71      17.1 +/-    0.71  0.030 / 0.040