PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-12:12:30
G02     203.7          32.4                4.7 +/-    0.96       7.9 +/-    0.96  0.110 / 0.090
G06     156.6          69.2                5.1 +/-    0.66       5.5 +/-    0.66  0.090 / 0.090
G12     306.9          15.8                2.7 +/-    2.20       6.7 +/-    2.20  0.030 / 0.050
G17     33.5           51.1                2.8 +/-    0.51       3.5 +/-    0.51  0.040 / 0.050
G19     4.6            64.7                3.8 +/-    0.73       4.2 +/-    0.73  0.130 / 0.350
G24     299.1          36.8                5.7 +/-    0.83       8.8 +/-    0.83  0.130 / 0.360
G28     98.0           37.7                5.8 +/-    1.05       8.8 +/-    1.05  0.040 / 0.030