PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/22-18:12:00
G02     46.8           43.6                7.9 +/-    0.89      10.9 +/-    0.89  0.060 / 0.070
G05     90.2           69.7                8.5 +/-    0.50       9.0 +/-    0.50  0.030 / 0.070
G12     187.2          47.5               11.6 +/-    1.04      15.2 +/-    1.04  0.030 / 0.060
G25     262.6          57.9               11.0 +/-    0.96      12.7 +/-    0.96  0.040 / 0.050
G29     319.9          42.5               10.0 +/-    1.36      14.0 +/-    1.36  0.030 / 0.040