PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/22-15:57:30
G02     45.1           44.7                7.5 +/-    1.42      10.2 +/-    1.42  0.060 / 0.060
G05     104.8          70.5                8.2 +/-    0.53       8.7 +/-    0.53  0.050 / 0.060
G12     186.8          50.1                9.7 +/-    0.66      12.3 +/-    0.66  0.030 / 0.030
G25     269.2          58.1               10.9 +/-    1.01      12.6 +/-    1.01  0.030 / 0.030
G29     317.4          39.4                7.2 +/-    1.25      10.5 +/-    1.25  0.050 / 0.050