PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-08:27:50
G03     227.2          64.4                5.5 +/-    0.80       6.1 +/-    0.80  0.050 / 0.050
G07     251.8          10.9               -5.1 +/-   12.87     -13.9 +/-   12.87  0.050 / 0.060
G09     307.6          24.8                3.5 +/-    0.81       6.9 +/-    0.81  0.070 / 0.290
G14     103.9          12.1                3.6 +/-    2.87       9.6 +/-    2.87  0.090 / 0.230
G16     107.5          62.3                5.0 +/-    0.26       5.5 +/-    0.26  0.040 / 0.050
G22     191.6          48.9                6.1 +/-    0.77       7.8 +/-    0.77  0.040 / 0.040
G23     324.6          54.5                3.8 +/-    0.43       4.6 +/-    0.43  0.110 / 0.300
G26     58.9           46.3                2.6 +/-    0.95       3.4 +/-    0.95  0.160 / 0.300
G31     56.1           13.1                1.3 +/-    1.72       3.3 +/-    1.72  0.030 / 0.030