PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-21:27:50
G10     248.9          24.4               18.5 +/-    1.11      36.5 +/-    1.11  0.070 / 0.140
G13     56.7           32.5               12.8 +/-    0.85      21.3 +/-    0.85  0.110 / 0.110
G15     91.2           57.8               14.5 +/-    1.08      16.8 +/-    1.08  0.140 / 0.350
G16     300.9          14.0               11.6 +/-    1.28      29.7 +/-    1.28  0.130 / 0.340
G18     266.3          54.8               13.8 +/-    2.38      16.4 +/-    2.38  0.040 / 0.050
G20     41.6           49.9               14.2 +/-    0.98      18.0 +/-    0.98  0.040 / 0.050
G21     332.7          59.8               14.3 +/-    0.38      16.3 +/-    0.38  0.040 / 0.060
G26     273.3          15.9               16.4 +/-    2.21      39.8 +/-    2.21  0.050 / 0.050
G29     162.4          48.0               17.7 +/-    0.63      22.9 +/-    0.63  0.040 / 0.040