PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-00:27:30
G02     32.0           56.0                7.9 +/-    1.32       9.3 +/-    1.32  0.060 / 0.050
G05     139.4          61.1                7.6 +/-    0.78       8.6 +/-    0.78  0.080 / 0.050
G06     51.9           18.8                6.9 +/-    2.68      15.7 +/-    2.68  0.040 / 0.040
G12     208.0          71.6                6.5 +/-    0.33       6.8 +/-    0.33  0.060 / 0.040
G19     98.6           10.0               10.8 +/-    2.21      30.0 +/-    2.21  0.030 / 0.020
G25     299.0          52.6                5.4 +/-    1.97       6.5 +/-    1.97  0.030 / 0.030
G29     307.6          29.6                6.6 +/-    1.40      11.6 +/-    1.40  0.080 / 0.120