PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-22:27:50
G10     269.3          38.8               17.1 +/-    1.52      25.4 +/-    1.52  0.040 / 0.120
G13     41.6           18.2               11.6 +/-    0.57      26.7 +/-    0.57  0.050 / 0.110
G15     57.3           47.5               14.7 +/-    0.70      19.1 +/-    0.70  0.100 / 0.190
G16     280.1          10.5               14.2 +/-    4.78      39.1 +/-    4.78  0.120 / 0.200
G18     305.6          65.0               12.0 +/-    1.68      13.1 +/-    1.68  0.120 / 0.490
G20     56.4           32.5               11.8 +/-    0.71      19.6 +/-    0.71  0.090 / 0.510
G21     12.8           73.7               14.7 +/-    1.00      15.3 +/-    1.00  0.080 / 0.160
G24     119.6          15.2               18.5 +/-    1.80      45.8 +/-    1.80  0.110 / 0.150
G27     316.6          22.0                8.5 +/-    2.38      17.7 +/-    2.38  0.040 / 0.040
G29     166.7          25.1               16.6 +/-    0.71      32.3 +/-    0.71  0.040 / 0.040