PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-01:42:50
G10     268.6          38.3                7.5 +/-    1.77      11.2 +/-    1.77  0.190 / 0.260
G13     41.7           18.3                6.0 +/-    2.81      13.7 +/-    2.81  0.150 / 0.250
G15     59.4           49.9                7.9 +/-    0.75      10.0 +/-    0.75  0.040 / 0.040
G16     278.9          10.9                8.2 +/-    1.79      22.5 +/-    1.79  0.040 / 0.030
G18     301.4          64.0                7.0 +/-    0.91       7.7 +/-    0.91  0.170 / 0.270
G20     56.4           32.1                5.5 +/-    1.02       9.2 +/-    1.02  0.170 / 0.290
G21     6.4            72.9                7.1 +/-    0.82       7.4 +/-    0.82  0.080 / 0.060
G24     120.1          14.8                8.2 +/-    1.64      20.6 +/-    1.64  0.110 / 0.070
G27     316.9          21.6                8.2 +/-    3.03      17.5 +/-    3.03  0.120 / 0.190
G29     167.5          27.5                8.9 +/-    1.15      16.5 +/-    1.15  0.220 / 0.240