PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-12:57:40
G02     206.3          39.6                5.8 +/-    1.18       8.5 +/-    1.18  0.070 / 0.080
G06     138.5          75.9                5.0 +/-    0.57       5.1 +/-    0.57  0.110 / 0.080
G12     310.7          21.3                2.8 +/-    4.04       5.9 +/-    4.04  0.040 / 0.050
G17     40.1           46.0                4.4 +/-    1.23       5.8 +/-    1.23  0.030 / 0.040
G19     17.6           59.8                4.2 +/-    0.84       4.8 +/-    0.84  0.040 / 0.050
G24     290.6          39.9                7.1 +/-    3.45      10.3 +/-    3.45  0.030 / 0.040
G28     105.6          32.8                6.2 +/-    0.78      10.3 +/-    0.78  0.020 / 0.030