PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/26-09:27:30
G01     106.1          26.0                6.6 +/-    2.44      12.6 +/-    2.44  0.030 / 0.030
G07     109.0          56.7                7.5 +/-    0.46       8.7 +/-    0.46  0.030 / 0.040
G08     41.5           17.6                3.8 +/-    2.41       8.9 +/-    2.41  0.020 / 0.020
G11     85.7           42.5                7.9 +/-    1.52      11.0 +/-    1.52  0.020 / 0.020
G13     308.6          29.6                4.6 +/-    1.71       8.1 +/-    1.71  0.070 / 0.120
G17     205.5          40.7                7.1 +/-    0.49      10.2 +/-    0.49  0.090 / 0.150
G18     77.6           24.0                5.1 +/-    1.41      10.3 +/-    1.41  0.090 / 0.140
G28     317.7          60.8                4.3 +/-    0.87       4.9 +/-    0.87  0.080 / 0.130
G30     19.3           78.3                6.9 +/-    0.50       7.0 +/-    0.50  0.060 / 0.140