PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/22-06:27:10
G02     46.3           43.4                4.8 +/-    1.40       6.6 +/-    1.40  0.040 / 0.040
G05     99.1           69.3                7.4 +/-    0.90       7.9 +/-    0.90  0.030 / 0.050
G06     60.4           10.0                4.3 +/-    1.51      11.9 +/-    1.51  0.030 / 0.040
G12     191.3          53.6                8.4 +/-    1.06      10.1 +/-    1.06  0.040 / 0.040
G25     263.8          59.7                7.1 +/-    0.84       8.0 +/-    0.84  0.030 / 0.020
G29     320.1          43.4                4.4 +/-    0.68       6.0 +/-    0.68  0.030 / 0.020