PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-15:28:10
G02     216.6          56.5                8.3 +/-    1.07       9.8 +/-    1.07  0.080 / 0.080
G06     55.7           72.0                9.5 +/-    1.05       9.9 +/-    1.05  0.090 / 0.080
G12     320.2          41.1                8.3 +/-    0.84      11.8 +/-    0.84  0.040 / 0.080
G17     58.4           30.6                8.1 +/-    1.08      14.1 +/-    1.08  0.040 / 0.080
G19     34.4           52.2                8.1 +/-    0.56       9.9 +/-    0.56  0.030 / 0.030
G24     263.0          42.0                7.8 +/-    1.01      10.9 +/-    1.01  0.040 / 0.030
G28     122.3          14.1                8.3 +/-    2.55      21.1 +/-    2.55  0.030 / 0.040