PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-12:57:50
G01     68.2           32.5                5.1 +/-    1.43       8.5 +/-    1.43  0.060 / 0.150
G07     138.6          28.8                4.8 +/-    1.19       8.6 +/-    1.19  0.060 / 0.150
G11     51.4           28.0                2.6 +/-    1.81       4.8 +/-    1.81  0.050 / 0.150
G13     271.2          37.4                4.3 +/-    1.52       6.6 +/-    1.52  0.050 / 0.120
G15     303.9          13.8                2.7 +/-    2.29       6.9 +/-    2.29  0.040 / 0.060
G17     239.0          72.9                4.6 +/-    1.37       4.8 +/-    1.37  0.040 / 0.050
G18     46.8           16.6                3.6 +/-    1.80       8.6 +/-    1.80  0.050 / 0.080
G19     225.5          40.3                5.6 +/-    0.83       8.1 +/-    0.83  0.060 / 0.070
G28     22.9           58.8                5.2 +/-    0.54       6.0 +/-    0.54  0.040 / 0.050
G30     137.9          61.6                6.9 +/-    0.66       7.7 +/-    0.66  0.050 / 0.050