PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-19:27:10
G02     42.0           48.3               11.2 +/-    0.66      14.5 +/-    0.66  0.040 / 0.050
G05     127.3          69.3               15.5 +/-    0.83      16.5 +/-    0.83  0.040 / 0.060
G12     190.5          54.4               13.7 +/-    1.14      16.4 +/-    1.14  0.040 / 0.060
G20     199.9          39.1               17.2 +/-    1.22      25.3 +/-    1.22  0.050 / 0.060
G25     268.3          60.2               12.7 +/-    1.01      14.4 +/-    1.01  0.020 / 0.040
G29     316.9          39.6               11.2 +/-    1.33      16.3 +/-    1.33  0.030 / 0.040