PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-09:12:50
G01     117.7          18.9                4.5 +/-    1.28      10.2 +/-    1.28  0.040 / 0.030
G07     85.9           65.1                5.9 +/-    0.61       6.4 +/-    0.61  0.030 / 0.040
G08     43.7           28.2                2.5 +/-    0.29       4.6 +/-    0.29  0.030 / 0.030
G09     173.3          19.9                7.7 +/-    2.01      17.0 +/-    2.01  0.030 / 0.030
G11     102.9          40.6                7.2 +/-    0.63      10.4 +/-    0.63  0.150 / 0.220
G13     316.7          21.0               -0.4 +/-    1.64      -0.9 +/-    1.64  0.150 / 0.210
G17     201.4          27.8                5.8 +/-    1.24      10.6 +/-    1.24  0.110 / 0.310
G18     91.0           21.3                4.0 +/-    0.99       8.6 +/-    0.99  0.080 / 0.270
G28     294.1          57.4                3.8 +/-    0.52       4.5 +/-    0.52  0.110 / 0.220
G30     345.8          68.9                3.5 +/-    0.84       3.7 +/-    0.84  0.110 / 0.180