PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-21:12:50
G01     253.5          36.3               12.8 +/-    2.06      19.9 +/-    2.06  0.040 / 0.040
G03     316.2          42.2               10.7 +/-    0.80      15.0 +/-    0.80  0.030 / 0.040
G11     239.7          13.9               11.2 +/-    1.62      28.7 +/-    1.62  0.210 / 0.220
G14     58.2           42.0                8.7 +/-    1.19      12.3 +/-    1.19  0.110 / 0.360
G22     307.2          63.9               10.3 +/-    0.67      11.3 +/-    0.67  0.030 / 0.030
G23     285.0          17.8               13.0 +/-    1.09      30.3 +/-    1.09  0.030 / 0.030
G25     41.2           11.3               10.9 +/-    3.23      29.6 +/-    3.23  0.060 / 0.090
G26     139.7          35.8               14.2 +/-    1.71      22.2 +/-    1.71  0.080 / 0.090
G31     41.1           62.1                8.8 +/-    0.50       9.9 +/-    0.50  0.050 / 0.110
G32     75.4           24.6                9.4 +/-    1.72      18.5 +/-    1.72  0.070 / 0.080