PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-14:28:00
G02     203.1          26.5                8.0 +/-    2.80      15.2 +/-    2.80  0.060 / 0.110
G06     160.1          65.5                7.2 +/-    0.52       7.8 +/-    0.52  0.050 / 0.110
G12     306.4          16.3                3.6 +/-    1.57       8.7 +/-    1.57  0.100 / 0.330
G17     33.5           51.2                5.5 +/-    0.76       6.8 +/-    0.76  0.110 / 0.330
G19     338.0          68.7                6.6 +/-    0.77       7.0 +/-    0.77  0.040 / 0.040
G24     301.4          37.0                5.5 +/-    1.18       8.4 +/-    1.18  0.030 / 0.040
G28     97.3           34.6                6.5 +/-    1.10      10.5 +/-    1.10  0.030 / 0.040