PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-02:12:20
G02     38.2           50.6                7.0 +/-    0.62       8.7 +/-    0.62  0.030 / 0.040
G05     125.6          66.0                7.8 +/-    0.39       8.4 +/-    0.39  0.030 / 0.050
G06     55.3           14.7                5.2 +/-    1.54      13.0 +/-    1.54  0.030 / 0.030
G12     198.4          64.6                9.3 +/-    0.59      10.2 +/-    0.59  0.030 / 0.040
G25     287.6          56.8                7.5 +/-    1.34       8.8 +/-    1.34  0.040 / 0.050
G29     313.0          35.6                7.8 +/-    1.22      12.2 +/-    1.22  0.040 / 0.040