PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-21:27:40
G02     38.1           51.2               11.1 +/-    0.45      13.8 +/-    0.45  0.030 / 0.040
G05     123.4          67.1               12.3 +/-    0.75      13.2 +/-    0.75  0.030 / 0.050
G12     188.4          57.9               13.8 +/-    1.40      15.9 +/-    1.40  0.050 / 0.050
G25     284.9          57.1               11.9 +/-    1.61      13.9 +/-    1.61  0.050 / 0.080
G29     311.4          32.0               10.2 +/-    1.57      17.2 +/-    1.57  0.040 / 0.060