PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-22:28:00
G01     221.8          12.8                8.0 +/-    3.06      20.9 +/-    3.06  0.040 / 0.060
G03     269.9          69.9                6.9 +/-    1.14       7.3 +/-    1.14  0.050 / 0.050
G09     298.4          13.6                6.1 +/-    3.09      15.6 +/-    3.09  0.180 / 0.480
G14     92.1           19.8                7.4 +/-    1.72      16.3 +/-    1.72  0.120 / 0.220
G16     141.5          50.4                8.4 +/-    0.63      10.5 +/-    0.63  0.040 / 0.040
G22     206.3          65.2                7.5 +/-    0.26       8.1 +/-    0.26  0.040 / 0.030
G23     310.7          40.0                6.7 +/-    1.14       9.7 +/-    1.14  0.040 / 0.030
G26     89.3           55.5                7.5 +/-    1.10       8.8 +/-    1.10  0.030 / 0.030
G31     46.8           30.3                6.1 +/-    0.90      10.5 +/-    0.90  0.100 / 0.230