PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-01:42:40
G02     31.1           56.8                8.4 +/-    1.38       9.8 +/-    1.38  0.050 / 0.050
G05     141.3          60.1               10.8 +/-    0.68      12.2 +/-    0.68  0.060 / 0.040
G06     51.0           20.5                8.3 +/-    1.95      18.1 +/-    1.95  0.030 / 0.020
G12     211.2          72.8               10.5 +/-    0.99      11.0 +/-    0.99  0.030 / 0.030
G19     97.5           11.0                9.7 +/-    2.10      26.5 +/-    2.10  0.040 / 0.040
G25     300.2          52.2                9.6 +/-    1.50      11.7 +/-    1.50  0.030 / 0.030
G29     307.2          29.5                8.1 +/-    1.10      14.4 +/-    1.10  0.100 / 0.240