PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-21:13:00
G02     57.7           35.3                7.2 +/-    0.85      11.4 +/-    0.85  0.060 / 0.140
G05     64.1           66.1                9.6 +/-    0.45      10.4 +/-    0.45  0.070 / 0.120
G12     184.8          32.6               12.9 +/-    2.27      21.4 +/-    2.27  0.050 / 0.060
G13     130.4          14.6               12.7 +/-    2.85      31.8 +/-    2.85  0.040 / 0.060
G15     165.4          10.5                0.3 +/-   31.80       0.7 +/-   31.80  0.170 / 0.510
G20     206.4          60.6               13.7 +/-    0.77      15.5 +/-    0.77  0.140 / 0.400
G21     270.4          17.1               14.4 +/-    3.22      34.1 +/-    3.22  0.030 / 0.050
G25     229.9          51.3               12.5 +/-    1.74      15.5 +/-    1.74  0.030 / 0.050
G29     329.6          56.2                9.3 +/-    0.75      10.9 +/-    0.75  0.030 / 0.040