PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/07-19:12:00
G02     46.8           43.5                8.8 +/-    0.49      12.1 +/-    0.49  0.040 / 0.050
G05     90.8           69.5                9.2 +/-    0.53       9.7 +/-    0.53  0.040 / 0.050
G12     187.9          48.6                9.7 +/-    1.72      12.4 +/-    1.72  0.040 / 0.080
G25     263.9          58.0                9.9 +/-    1.02      11.4 +/-    1.02  0.040 / 0.070
G29     319.7          42.3                9.6 +/-    1.47      13.5 +/-    1.47  0.030 / 0.040