PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-18:12:30
G02     28.3           59.6               17.2 +/-    1.03      19.6 +/-    1.03  0.190 / 0.190
G05     154.0          56.4               19.2 +/-    0.59      22.6 +/-    0.59  0.190 / 0.220
G06     52.0           19.1               14.3 +/-    1.54      32.1 +/-    1.54  0.050 / 0.050
G12     205.3          71.4               15.5 +/-    0.68      16.3 +/-    0.68  0.040 / 0.050
G19     98.2           10.3               16.1 +/-    1.26      44.6 +/-    1.26  0.030 / 0.020
G20     197.7          23.4               18.6 +/-    2.98      37.7 +/-    2.98  0.030 / 0.030
G25     298.5          54.3               15.6 +/-    2.54      18.8 +/-    2.54  0.170 / 0.310
G29     306.4          28.3               15.3 +/-    0.70      27.7 +/-    0.70  0.150 / 0.300