PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-01:58:10
G02     31.0           56.9                9.5 +/-    1.32      11.2 +/-    1.32  0.030 / 0.020
G05     141.6          59.9               11.9 +/-    1.10      13.5 +/-    1.10  0.030 / 0.030
G06     50.9           20.8                7.9 +/-    1.99      17.0 +/-    1.99  0.150 / 0.200
G12     211.6          73.0               11.2 +/-    1.35      11.7 +/-    1.35  0.140 / 0.200
G19     97.4           11.1                9.3 +/-    1.77      25.3 +/-    1.77  0.040 / 0.060
G25     300.3          52.2               11.0 +/-    1.91      13.5 +/-    1.91  0.090 / 0.060
G29     307.2          29.6                8.4 +/-    1.31      14.8 +/-    1.31  0.030 / 0.040