PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-21:58:00
G01     255.7          37.2               10.4 +/-    1.99      15.9 +/-    1.99  0.050 / 0.040
G03     316.4          40.0                7.6 +/-    1.29      11.0 +/-    1.29  0.040 / 0.040
G11     240.9          14.9               11.0 +/-    1.88      27.4 +/-    1.88  0.180 / 0.210
G14     56.5           42.9                7.9 +/-    1.84      11.0 +/-    1.84  0.130 / 0.250
G22     309.0          61.9                7.6 +/-    0.83       8.4 +/-    0.83  0.020 / 0.040
G23     283.5          16.4                8.5 +/-    8.82      20.3 +/-    8.82  0.030 / 0.030
G25     42.4           12.0                8.2 +/-    1.68      21.9 +/-    1.68  0.070 / 0.100
G26     141.8          34.0               12.1 +/-    0.91      19.5 +/-    0.91  0.070 / 0.090
G31     41.8           64.6                7.7 +/-    0.57       8.4 +/-    0.57  0.050 / 0.090
G32     73.7           26.1                7.6 +/-    1.15      14.6 +/-    1.15  0.060 / 0.090