PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-21:27:40
G05     48.0           19.3                7.6 +/-    2.23      17.1 +/-    2.23  0.260 / 0.230
G10     234.8          10.8              -12.4 +/-   28.88     -34.0 +/-   28.88  0.160 / 0.170
G13     78.4           36.3               10.2 +/-    0.84      15.8 +/-    0.84  0.070 / 0.070
G15     133.4          50.1               11.0 +/-    0.59      13.8 +/-    0.59  0.070 / 0.080
G16     314.6          12.7                7.7 +/-    5.35      20.3 +/-    5.35  0.140 / 0.390
G20     239.4          3.1                 6.7 +/-    1.38      20.7 +/-    1.38  0.190 / 0.370
G21     310.1          44.6                9.9 +/-    1.39      13.3 +/-    1.39  0.170 / 0.440
G25     199.8          12.2               13.3 +/-    2.67      35.3 +/-    2.67  0.160 / 0.450
G26     288.1          21.1               10.2 +/-    1.22      21.9 +/-    1.22  0.070 / 0.090
G29     154.1          76.5                8.9 +/-    0.70       9.1 +/-    0.70  0.080 / 0.110