PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-21:57:40
G02     38.2           50.6                6.9 +/-    1.65       8.6 +/-    1.65  0.040 / 0.060
G05     123.7          66.7                9.6 +/-    0.74      10.3 +/-    0.74  0.040 / 0.040
G06     56.8           11.5                6.7 +/-    2.01      18.1 +/-    2.01  0.050 / 0.060
G12     195.7          62.8                9.3 +/-    0.52      10.3 +/-    0.52  0.050 / 0.050
G25     287.2          56.4                8.1 +/-    2.85       9.5 +/-    2.85  0.030 / 0.030
G29     312.4          34.1                7.2 +/-    1.15      11.7 +/-    1.15  0.030 / 0.030