PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-07:28:00
G02     199.3          19.5                4.7 +/-    2.16      10.4 +/-    2.16  0.070 / 0.170
G06     170.1          51.4                8.9 +/-    1.24      11.0 +/-    1.24  0.080 / 0.220
G13     227.4          15.1                4.2 +/-    2.82      10.3 +/-    2.82  0.040 / 0.040
G17     19.5           61.6               -0.4 +/-    1.38      -0.5 +/-    1.38  0.040 / 0.030
G19     321.3          72.1                6.5 +/-    0.87       6.8 +/-    0.87  0.100 / 0.280
G24     311.9          26.5                3.5 +/-    0.92       6.6 +/-    0.92  0.140 / 0.250
G28     78.0           47.9                5.9 +/-    1.57       7.7 +/-    1.57  0.040 / 0.090
G30     158.0          20.0                5.7 +/-    1.82      12.5 +/-    1.82  0.050 / 0.080