PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-10:27:50
G02     49.9           39.4                4.2 +/-    0.46       6.2 +/-    0.46  0.030 / 0.030
G05     94.2           70.2                6.4 +/-    0.82       6.7 +/-    0.82  0.030 / 0.030
G12     185.1          46.6                8.4 +/-    2.23      11.0 +/-    2.23  0.040 / 0.060
G25     261.5          58.4                6.5 +/-    0.81       7.4 +/-    0.81  0.050 / 0.060
G29     318.8          41.1                6.4 +/-    1.43       9.2 +/-    1.43  0.030 / 0.040