PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-17:27:50
G03     233.2          68.7                8.6 +/-    0.81       9.2 +/-    0.81  0.130 / 0.410
G09     302.7          17.3                7.7 +/-    3.51      18.2 +/-    3.51  0.130 / 0.400
G14     99.2           14.0                8.1 +/-    3.07      20.5 +/-    3.07  0.040 / 0.040
G16     136.9          56.6                9.0 +/-    0.59      10.5 +/-    0.59  0.040 / 0.040
G22     192.7          54.4                8.9 +/-    0.34      10.7 +/-    0.34  0.190 / 0.220
G23     317.6          47.3                7.2 +/-    0.96       9.5 +/-    0.96  0.220 / 0.210
G26     77.2           55.4                7.1 +/-    0.68       8.5 +/-    0.68  0.030 / 0.040
G31     51.1           22.7                5.9 +/-    3.16      12.2 +/-    3.16  0.030 / 0.040