PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-22:57:40
G02     214.4          59.0               13.0 +/-    0.87      14.9 +/-    0.87  0.050 / 0.110
G06     69.9           78.5                9.9 +/-    0.84      10.1 +/-    0.84  0.060 / 0.080
G12     316.8          31.7                8.9 +/-    1.03      15.1 +/-    1.03  0.050 / 0.090
G17     55.8           33.0                8.8 +/-    0.36      14.5 +/-    0.36  0.050 / 0.110
G19     37.2           50.1                9.4 +/-    0.52      11.8 +/-    0.52  0.140 / 0.230
G24     266.5          42.0               10.4 +/-    1.17      14.7 +/-    1.17  0.170 / 0.240
G28     119.9          19.1               12.6 +/-    0.83      28.4 +/-    0.83  0.060 / 0.050