PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-10:12:10
G02     44.7           44.1                5.0 +/-    0.68       6.9 +/-    0.68  0.040 / 0.030
G05     116.5          69.3                8.2 +/-    0.76       8.7 +/-    0.76  0.040 / 0.030
G12     186.9          54.1                7.9 +/-    0.76       9.5 +/-    0.76  0.050 / 0.050
G25     275.9          58.4               14.6 +/-    1.70      16.8 +/-    1.70  0.050 / 0.040
G29     314.3          35.6                5.9 +/-    2.25       9.2 +/-    2.25  0.080 / 0.090