PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-09:27:50
G01     127.3          11.4                3.2 +/-    2.77       8.8 +/-    2.77  0.030 / 0.040
G07     53.8           69.3                4.1 +/-    0.67       4.4 +/-    0.67  0.040 / 0.040
G08     49.7           38.1                2.5 +/-    0.52       3.8 +/-    0.52  0.110 / 0.280
G09     174.7          32.1                5.9 +/-    1.62       9.9 +/-    1.62  0.100 / 0.300
G11     117.2          35.4                5.3 +/-    0.71       8.3 +/-    0.71  0.040 / 0.070
G13     321.1          11.7               -2.8 +/-   15.47      -7.4 +/-   15.47  0.050 / 0.070
G17     199.3          15.9                5.2 +/-    2.12      12.8 +/-    2.12  0.030 / 0.030
G18     102.7          16.5                4.3 +/-    0.88      10.4 +/-    0.88  0.040 / 0.030
G28     274.8          52.1                4.9 +/-    0.65       6.1 +/-    0.65  0.040 / 0.060
G30     330.6          59.1                2.7 +/-    1.00       3.1 +/-    1.00  0.050 / 0.060