PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-00:58:10
G02     34.5           54.3               10.3 +/-    0.47      12.4 +/-    0.47  0.020 / 0.040
G05     134.8          63.1               12.9 +/-    0.66      14.3 +/-    0.66  0.040 / 0.040
G06     54.4           14.7                8.3 +/-    1.54      20.8 +/-    1.54  0.030 / 0.040
G12     196.9          66.7               11.0 +/-    1.44      11.9 +/-    1.44  0.030 / 0.040
G19     100.1          10.6               12.3 +/-    1.73      33.8 +/-    1.73  0.040 / 0.060
G25     296.7          53.3               10.9 +/-    0.70      13.2 +/-    0.70  0.050 / 0.050
G29     307.4          27.7                7.8 +/-    1.46      14.4 +/-    1.46  0.040 / 0.060