PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-11:27:50
G01     43.6           19.6                3.5 +/-    2.37       7.7 +/-    2.37  0.170 / 0.220
G06     174.8          33.0                4.9 +/-    1.80       8.1 +/-    1.80  0.120 / 0.260
G11     43.7           10.5                3.4 +/-    2.75       9.4 +/-    2.75  0.030 / 0.030
G13     241.8          26.7                5.3 +/-    1.55      10.0 +/-    1.55  0.030 / 0.020
G15     277.4          13.9                2.5 +/-    1.19       6.3 +/-    1.19  0.040 / 0.040
G17     335.9          76.1                5.2 +/-    0.56       5.3 +/-    0.56  0.040 / 0.040
G19     262.2          67.4                4.5 +/-    0.64       4.8 +/-    0.64  0.070 / 0.090
G24     318.3          12.9               -0.1 +/-    2.14      -0.4 +/-    2.14  0.060 / 0.110
G28     54.1           54.6                4.0 +/-    0.72       4.7 +/-    0.72  0.040 / 0.050
G30     153.2          35.3                5.0 +/-    0.76       7.8 +/-    0.76  0.040 / 0.050