PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-17:57:50
G02     6.3            71.5                8.1 +/-    0.31       8.5 +/-    0.31  0.040 / 0.060
G05     158.9          45.0               10.1 +/-    1.21      13.6 +/-    1.21  0.040 / 0.050
G06     46.1           27.7                7.0 +/-    1.58      13.0 +/-    1.58  0.250 / 0.260
G12     236.3          81.5                7.0 +/-    0.36       7.1 +/-    0.36  0.120 / 0.270
G19     83.8           23.3                9.1 +/-    1.72      18.6 +/-    1.72  0.020 / 0.030
G24     218.2          14.0                9.7 +/-    4.00      24.7 +/-    4.00  0.030 / 0.020
G25     313.2          40.5                9.0 +/-    1.07      13.0 +/-    1.07  0.070 / 0.100
G29     294.1          14.7                8.6 +/-    2.31      21.5 +/-    2.31  0.060 / 0.090