PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/23-21:43:10
G02     35.8           52.6                9.8 +/-    0.58      12.0 +/-    0.58  0.040 / 0.070
G05     130.1          65.1               11.6 +/-    0.93      12.7 +/-    0.93  0.040 / 0.060
G06     55.3           13.3                7.3 +/-    1.09      18.9 +/-    1.09  0.050 / 0.060
G12     198.2          65.6                9.6 +/-    0.61      10.4 +/-    0.61  0.050 / 0.070
G25     291.7          55.1                8.6 +/-    1.01      10.2 +/-    1.01  0.030 / 0.040
G29     310.5          32.0                9.3 +/-    1.19      15.6 +/-    1.19  0.030 / 0.050