PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-19:58:00
G01     307.3          32.9                8.5 +/-    2.02      14.0 +/-    2.02  0.170 / 0.150
G10     105.6          40.8               10.5 +/-    0.82      15.1 +/-    0.82  0.080 / 0.190
G11     283.1          28.1                8.7 +/-    0.64      15.9 +/-    0.64  0.040 / 0.030
G14     356.4          67.0                9.2 +/-    0.46       9.9 +/-    0.46  0.020 / 0.030
G18     117.5          13.0               10.0 +/-    2.10      26.1 +/-    2.10  0.130 / 0.120
G22     309.4          25.1                8.7 +/-    1.56      16.9 +/-    1.56  0.080 / 0.130
G25     82.3           16.5                9.8 +/-    1.57      23.4 +/-    1.57  0.030 / 0.040
G31     170.0          63.5               12.5 +/-    0.66      13.8 +/-    0.66  0.030 / 0.040
G32     35.0           53.3                9.8 +/-    1.19      11.9 +/-    1.19  0.030 / 0.030