PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-21:42:40
G02     32.1           55.7                7.7 +/-    0.47       9.2 +/-    0.47  0.050 / 0.070
G05     138.2          62.0               10.0 +/-    0.68      11.2 +/-    0.68  0.050 / 0.060
G06     53.0           16.4                6.4 +/-    1.64      15.3 +/-    1.64  0.040 / 0.060
G12     203.9          70.0               10.2 +/-    1.26      10.8 +/-    1.26  0.040 / 0.060
G25     298.0          52.8                7.3 +/-    0.66       9.0 +/-    0.66  0.030 / 0.040
G29     307.6          29.1                7.5 +/-    1.67      13.4 +/-    1.67  0.030 / 0.040