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                7.8 +/-    0.66       9.8 +/-    0.66  0.040 / 0.040
G05     123.7          66.7                9.4 +/-    0.62      10.1 +/-    0.62  0.040 / 0.060
G06     56.8           11.5                7.3 +/-    1.96      19.6 +/-    1.96  0.050 / 0.060
G12     195.7          62.8               10.9 +/-    0.94      12.1 +/-    0.94  0.040 / 0.070
G25     287.2          56.4                7.4 +/-    0.81       8.7 +/-    0.81  0.030 / 0.050
G29     312.4          34.1                8.8 +/-    1.40      14.2 +/-    1.40  0.040 / 0.050