PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-00:27:50
G07     342.3          61.0                7.1 +/-    0.62       8.0 +/-    0.62  0.100 / 0.150
G08     90.2           53.0                7.3 +/-    1.13       8.8 +/-    1.13  0.120 / 0.100
G09     187.4          68.1                8.8 +/-    0.29       9.4 +/-    0.29  0.040 / 0.040
G11     143.3          16.2               10.2 +/-    2.81      24.7 +/-    2.81  0.040 / 0.040
G23     157.2          35.1                9.2 +/-    0.73      14.6 +/-    0.73  0.030 / 0.030
G27     49.2           27.5                4.3 +/-    2.08       8.0 +/-    2.08  0.040 / 0.030
G28     242.8          34.9               11.0 +/-    2.41      17.5 +/-    2.41  0.030 / 0.020
G30     309.1          41.9                6.9 +/-    0.77       9.8 +/-    0.77  0.020 / 0.030