PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-09:57:40
G02     36.8           52.0                6.9 +/-    0.49       8.5 +/-    0.49  0.030 / 0.040
G05     133.7          65.1               11.5 +/-    1.14      12.5 +/-    1.14  0.040 / 0.050
G06     55.3           14.6                4.0 +/-    2.68      10.0 +/-    2.68  0.040 / 0.050
G12     196.3          64.2                9.3 +/-    0.85      10.2 +/-    0.85  0.060 / 0.040
G25     282.0          59.9                6.8 +/-    0.99       7.7 +/-    0.99  0.140 / 0.260
G29     311.2          32.8                4.5 +/-    1.18       7.4 +/-    1.18  0.110 / 0.220