PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-15:43:10
G01     37.2           9.7                 5.5 +/-    4.31      15.5 +/-    4.31  0.100 / 0.250
G02     200.2          13.5                7.8 +/-    3.80      20.0 +/-    3.80  0.090 / 0.260
G06     172.0          47.4               13.8 +/-    0.88      18.0 +/-    0.88  0.040 / 0.030
G13     230.3          17.4                7.4 +/-    1.38      17.5 +/-    1.38  0.030 / 0.030
G17     8.4            66.7                7.6 +/-    0.48       8.2 +/-    0.48  0.060 / 0.070
G19     305.9          72.1                8.6 +/-    0.63       9.0 +/-    0.63  0.050 / 0.070
G24     313.4          24.7                6.9 +/-    1.06      13.5 +/-    1.06  0.040 / 0.040
G28     75.7           47.7                9.0 +/-    2.05      11.7 +/-    2.05  0.040 / 0.030
G30     155.9          19.2                7.8 +/-    1.63      17.6 +/-    1.63  0.120 / 0.410