PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-07:57:30
G02     200.7          28.6                4.3 +/-    1.68       7.8 +/-    1.68  0.080 / 0.070
G06     175.3          56.7                7.6 +/-    0.69       8.8 +/-    0.69  0.110 / 0.090
G17     30.0           54.1                4.2 +/-    0.85       5.0 +/-    0.85  0.030 / 0.030
G19     347.1          68.7                3.7 +/-    0.54       4.0 +/-    0.54  0.040 / 0.050
G24     306.2          32.9                3.4 +/-    2.82       5.5 +/-    2.82  0.040 / 0.030
G28     95.7           35.2                7.2 +/-    0.93      11.3 +/-    0.93  0.030 / 0.030