PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-08:28:10
G01     123.5          14.5                5.9 +/-    2.33      14.9 +/-    2.33  0.040 / 0.040
G07     68.4           68.0                5.8 +/-    0.54       6.3 +/-    0.54  0.030 / 0.040
G08     46.6           33.9                4.2 +/-    0.77       6.8 +/-    0.77  0.170 / 0.260
G09     173.7          26.3                7.0 +/-    0.87      13.4 +/-    0.87  0.190 / 0.330
G11     111.5          37.9                6.9 +/-    1.04      10.4 +/-    1.04  0.030 / 0.040
G13     319.6          15.6                1.1 +/-    3.98       2.6 +/-    3.98  0.020 / 0.040
G17     199.8          21.0                5.7 +/-    1.86      12.2 +/-    1.86  0.120 / 0.620
G18     97.8           18.7                5.2 +/-    0.99      11.8 +/-    0.99  0.110 / 0.400
G28     282.1          54.4                6.2 +/-    0.74       7.5 +/-    0.74  0.110 / 0.250
G30     335.9          63.0                4.3 +/-    0.48       4.8 +/-    0.48  0.100 / 0.230