PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:12:30
G06     177.1          33.8               14.9 +/-    0.95      24.2 +/-    0.95  0.110 / 0.180
G13     239.1          24.3               15.1 +/-    1.67      30.0 +/-    1.67  0.100 / 0.200
G15     272.6          13.2               14.9 +/-    2.33      38.7 +/-    2.33  0.060 / 0.180
G17     357.2          72.4               14.5 +/-    0.73      15.2 +/-    0.73  0.090 / 0.150
G19     269.1          68.0               14.0 +/-    0.40      15.0 +/-    0.40  0.080 / 0.260
G24     316.9          17.8               13.8 +/-    1.56      32.0 +/-    1.56  0.090 / 0.240
G28     62.8           51.4               12.8 +/-    0.44      15.9 +/-    0.44  0.040 / 0.040
G30     153.3          28.7               14.3 +/-    0.89      25.7 +/-    0.89  0.040 / 0.040