PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-21:12:50
G10     268.6          38.4               16.3 +/-    2.34      24.3 +/-    2.34  0.140 / 0.260
G13     41.8           18.5               12.1 +/-    1.38      27.6 +/-    1.38  0.130 / 0.240
G15     57.4           47.4               14.7 +/-    0.57      19.2 +/-    0.57  0.040 / 0.040
G16     281.5          10.7               12.9 +/-    2.23      35.5 +/-    2.23  0.040 / 0.040
G18     305.2          65.1               13.2 +/-    0.86      14.4 +/-    0.86  0.170 / 0.470
G20     55.7           33.5               11.9 +/-    0.81      19.5 +/-    0.81  0.110 / 0.600
G21     13.4           73.6               16.1 +/-    1.12      16.7 +/-    1.12  0.110 / 0.200
G24     120.1          14.9               20.2 +/-    1.14      50.2 +/-    1.14  0.080 / 0.180
G27     316.9          21.6                9.5 +/-    4.34      20.2 +/-    4.34  0.100 / 0.230
G29     166.2          25.0               15.7 +/-    1.16      30.8 +/-    1.16  0.110 / 0.260