PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-23:43:10
G10     260.9          33.5               11.4 +/-    1.38      18.7 +/-    1.38  0.040 / 0.040
G13     45.8           24.2                8.9 +/-    1.99      17.7 +/-    1.99  0.050 / 0.050
G15     68.1           53.9               11.0 +/-    0.72      13.3 +/-    0.72  0.150 / 0.480
G16     286.9          13.0                9.6 +/-    1.76      25.1 +/-    1.76  0.140 / 0.560
G18     287.5          61.5               11.2 +/-    0.61      12.5 +/-    0.61  0.060 / 0.100
G20     51.1           38.3                8.7 +/-    0.33      13.1 +/-    0.33  0.080 / 0.090
G21     351.2          68.4                9.2 +/-    0.80       9.8 +/-    0.80  0.150 / 0.340
G26     259.9          10.6               10.2 +/-    1.30      28.2 +/-    1.30  0.160 / 0.300
G27     320.1          15.7                9.0 +/-    2.64      21.9 +/-    2.64  0.070 / 0.100
G29     166.1          34.5               12.4 +/-    0.75      19.8 +/-    0.75  0.050 / 0.090