PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-21:42:40
G10     265.4          36.5               15.9 +/-    0.95      24.6 +/-    0.95  0.120 / 0.310
G13     43.3           20.9               11.7 +/-    1.41      25.2 +/-    1.41  0.170 / 0.380
G15     60.9           49.9               15.4 +/-    0.70      19.5 +/-    0.70  0.040 / 0.050
G16     284.0          11.6               15.3 +/-    3.49      41.1 +/-    3.49  0.040 / 0.050
G18     298.0          64.0               14.8 +/-    1.03      16.3 +/-    1.03  0.140 / 0.600
G20     53.7           35.5               12.9 +/-    1.42      20.3 +/-    1.42  0.180 / 0.710
G21     3.7            71.8               16.4 +/-    0.60      17.1 +/-    0.60  0.070 / 0.240
G24     122.6          13.1               16.8 +/-    1.93      43.7 +/-    1.93  0.080 / 0.230
G27     318.4          19.2               13.8 +/-    1.93      31.0 +/-    1.93  0.060 / 0.140
G29     166.1          28.5               16.7 +/-    0.97      30.1 +/-    0.97  0.050 / 0.120