PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/14-15:58:00
G02     36.9           52.5               11.1 +/-    0.40      13.6 +/-    0.40  0.050 / 0.040
G05     139.4          64.2               14.1 +/-    1.32      15.5 +/-    1.32  0.040 / 0.040
G06     55.5           15.0                8.7 +/-    3.54      21.6 +/-    3.54  0.040 / 0.040
G12     197.4          64.2               13.4 +/-    0.86      14.7 +/-    0.86  0.040 / 0.040
G20     199.1          29.8               14.8 +/-    2.62      26.0 +/-    2.62  0.070 / 0.190
G25     288.3          57.1               13.4 +/-    0.87      15.7 +/-    0.87  0.060 / 0.190
G29     312.7          35.4               11.5 +/-    1.58      18.1 +/-    1.58  0.110 / 0.250