PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-17:13:00
G02     58.8           33.7                8.0 +/-    0.40      13.0 +/-    0.40  0.040 / 0.080
G05     58.5           62.5                9.7 +/-    0.79      10.8 +/-    0.79  0.040 / 0.070
G12     183.5          31.9               10.1 +/-    1.82      17.0 +/-    1.82  0.170 / 0.440
G13     126.2          15.3               13.7 +/-    1.02      33.8 +/-    1.02  0.200 / 0.580
G15     163.9          12.7               12.2 +/-    2.10      31.9 +/-    2.10  0.150 / 0.300
G21     271.9          16.8                9.2 +/-    1.92      21.9 +/-    1.92  0.130 / 0.290
G25     237.2          51.8                9.1 +/-    1.13      11.2 +/-    1.13  0.080 / 0.110
G29     328.8          54.6                6.9 +/-    1.60       8.3 +/-    1.60  0.040 / 0.130