PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/24-21:42:50
G10     271.3          39.9               18.5 +/-    1.17      26.9 +/-    1.17  0.040 / 0.050
G13     40.8           16.6               11.9 +/-    2.00      28.5 +/-    2.00  0.030 / 0.040
G15     55.3           45.7               13.7 +/-    0.60      18.3 +/-    0.60  0.100 / 0.230
G18     310.5          65.7               14.7 +/-    0.58      16.0 +/-    0.58  0.100 / 0.260
G20     57.5           31.5               13.5 +/-    1.40      23.0 +/-    1.40  0.170 / 0.410
G21     20.4           74.7               15.1 +/-    0.83      15.6 +/-    0.83  0.120 / 0.550
G24     118.1          16.3               16.6 +/-    1.55      40.0 +/-    1.55  0.070 / 0.120
G27     315.6          23.4               12.8 +/-    1.58      26.0 +/-    1.58  0.060 / 0.130
G29     166.5          22.8               18.3 +/-    1.60      37.6 +/-    1.60  0.080 / 0.140