PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-12:57:50
G02     205.6          37.6                5.4 +/-    1.16       8.2 +/-    1.16  0.070 / 0.090
G06     144.6          74.4                5.6 +/-    0.67       5.8 +/-    0.67  0.060 / 0.080
G12     309.8          19.8                2.4 +/-    1.02       5.3 +/-    1.02  0.040 / 0.040
G17     38.3           47.3                5.8 +/-    1.58       7.5 +/-    1.58  0.050 / 0.060
G19     14.6           61.1                5.6 +/-    0.55       6.3 +/-    0.55  0.040 / 0.030
G24     292.9          39.2                4.2 +/-    1.56       6.2 +/-    1.56  0.040 / 0.040
G28     103.8          34.0                6.7 +/-    0.85      10.8 +/-    0.85  0.060 / 0.100