PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/14-02:57:50
G02     45.8           43.8                5.4 +/-    1.05       7.3 +/-    1.05  0.040 / 0.040
G05     98.9           69.0                6.3 +/-    0.66       6.7 +/-    0.66  0.030 / 0.030
G12     191.9          54.5                8.2 +/-    0.45       9.8 +/-    0.45  0.040 / 0.040
G25     268.6          59.0                6.5 +/-    2.78       7.4 +/-    2.78  0.040 / 0.040
G29     319.8          43.1                5.9 +/-    0.48       8.2 +/-    0.48  0.040 / 0.030