PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/11-20:27:50
G10     268.6          38.5               28.3 +/-    1.71      42.2 +/-    1.71  0.120 / 0.270
G13     41.7           18.4               15.8 +/-    0.97      36.1 +/-    0.97  0.110 / 0.230
G15     57.2           47.1               21.8 +/-    0.54      28.6 +/-    0.54  0.040 / 0.040
G16     282.0          10.6               20.7 +/-    3.25      57.1 +/-    3.25  0.040 / 0.040
G18     305.8          65.3               23.3 +/-    0.57      25.4 +/-    0.57  0.110 / 0.180
G20     55.6           33.8               18.5 +/-    0.86      30.1 +/-    0.86  0.080 / 0.210
G21     15.0           73.7               23.6 +/-    1.07      24.5 +/-    1.07  0.040 / 0.130
G24     120.1          14.9               30.9 +/-    0.78      77.0 +/-    0.78  0.050 / 0.120
G27     317.0          21.5               15.2 +/-    3.95      32.1 +/-    3.95  0.140 / 0.490
G29     166.0          24.5               28.4 +/-    1.64      56.2 +/-    1.64  0.150 / 0.530