PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-17:12:30
G02     216.1          58.1                8.2 +/-    1.01       9.5 +/-    1.01  0.100 / 0.090
G06     59.0           74.6                7.9 +/-    0.56       8.1 +/-    0.56  0.090 / 0.060
G12     317.5          34.2                5.7 +/-    1.01       9.2 +/-    1.01  0.080 / 0.070
G17     54.6           35.2                7.5 +/-    1.45      11.8 +/-    1.45  0.070 / 0.090
G19     39.8           48.3                7.9 +/-    1.26      10.2 +/-    1.26  0.110 / 0.260
G24     266.6          41.3                8.7 +/-    1.43      12.4 +/-    1.43  0.100 / 0.250
G28     120.4          19.5                8.0 +/-    1.76      17.7 +/-    1.76  0.040 / 0.050