PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-21:27:00
G02     47.0           43.7               10.0 +/-    1.70      13.8 +/-    1.70  0.030 / 0.040
G05     91.3           69.2                9.2 +/-    0.46       9.8 +/-    0.46  0.020 / 0.040
G12     184.9          45.7               11.8 +/-    2.22      15.8 +/-    2.22  0.040 / 0.060
G25     262.7          58.4               11.7 +/-    0.66      13.4 +/-    0.66  0.040 / 0.060
G29     318.3          40.5               10.0 +/-    1.60      14.4 +/-    1.60  0.060 / 0.070