PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-12:43:00
G02     204.9          32.6                5.4 +/-    1.00       9.0 +/-    1.00  0.090 / 0.150
G06     154.5          71.1                5.4 +/-    0.99       5.7 +/-    0.99  0.090 / 0.180
G12     309.0          18.8                3.7 +/-    1.99       8.3 +/-    1.99  0.070 / 0.090
G17     38.8           46.6                3.0 +/-    0.52       3.9 +/-    0.52  0.080 / 0.100
G19     353.3          66.1                2.4 +/-    0.78       2.6 +/-    0.78  0.050 / 0.040
G24     293.6          40.7                4.6 +/-    0.77       6.6 +/-    0.77  0.030 / 0.030
G28     103.3          31.2                4.7 +/-    0.99       8.1 +/-    0.99  0.030 / 0.030