PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-21:43:10
G02     54.7           37.2                9.4 +/-    0.93      14.4 +/-    0.93  0.040 / 0.040
G05     66.5           64.9               10.7 +/-    0.46      11.7 +/-    0.46  0.040 / 0.040
G12     183.2          35.4               13.6 +/-    1.45      21.5 +/-    1.45  0.050 / 0.080
G13     131.8          11.9               12.6 +/-   21.11      33.6 +/-   21.11  0.030 / 0.080
G21     267.1          13.4                9.8 +/-   11.59      25.4 +/-   11.59  0.140 / 0.410
G25     244.1          55.0               11.4 +/-    0.80      13.6 +/-    0.80  0.150 / 0.380
G29     324.3          48.7               11.4 +/-    1.57      14.7 +/-    1.57  0.040 / 0.060