PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-17:43:10
G02     52.1           40.1                7.4 +/-    0.63      10.7 +/-    0.63  0.030 / 0.040
G05     73.4           68.2                6.7 +/-    0.73       7.1 +/-    0.73  0.030 / 0.040
G12     183.4          36.7                8.8 +/-    1.53      13.6 +/-    1.53  0.150 / 0.430
G13     132.4          11.1                5.1 +/-   25.68      13.8 +/-   25.68  0.150 / 0.400
G21     266.6          13.5                8.1 +/-    1.95      20.8 +/-    1.95  0.210 / 0.640
G25     242.6          55.5                8.5 +/-    0.50      10.1 +/-    0.50  0.210 / 0.540
G29     324.0          48.2                6.0 +/-    0.83       7.7 +/-    0.83  0.050 / 0.110