PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-17:58:00
G02     6.3            71.5                9.5 +/-    0.49       9.9 +/-    0.49  0.040 / 0.090
G05     158.9          45.0               10.3 +/-    1.30      13.9 +/-    1.30  0.050 / 0.080
G06     46.1           27.7                7.3 +/-    1.01      13.4 +/-    1.01  0.170 / 0.410
G12     236.3          81.5                7.7 +/-    0.26       7.8 +/-    0.26  0.180 / 0.410
G19     83.8           23.3                9.3 +/-    1.08      18.9 +/-    1.08  0.030 / 0.030
G24     218.2          14.0               11.8 +/-    4.49      30.1 +/-    4.49  0.030 / 0.030
G25     313.2          40.5                9.1 +/-    1.15      13.1 +/-    1.15  0.050 / 0.100
G29     294.1          14.7                9.5 +/-    1.38      23.8 +/-    1.38  0.060 / 0.100