PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-07:28:00
G03     264.7          68.8                4.5 +/-    1.12       4.7 +/-    1.12  0.200 / 0.220
G09     300.9          16.8                3.8 +/-    1.34       9.0 +/-    1.34  0.160 / 0.260
G14     95.6           16.7                4.2 +/-    1.33      10.0 +/-    1.33  0.030 / 0.040
G16     139.5          53.8                7.8 +/-    0.73       9.4 +/-    0.73  0.040 / 0.050
G22     199.7          62.0                4.8 +/-    0.38       5.3 +/-    0.38  0.060 / 0.080
G23     313.5          42.9                5.3 +/-    0.93       7.4 +/-    0.93  0.050 / 0.070
G26     82.7           55.1                7.5 +/-    1.12       9.0 +/-    1.12  0.110 / 0.340
G31     48.8           25.3                3.5 +/-    2.63       6.9 +/-    2.63  0.100 / 0.250