PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-21:27:50
G01     276.2          41.3               12.1 +/-    0.90      17.2 +/-    0.90  0.040 / 0.060
G03     315.0          25.9               10.4 +/-    2.15      20.0 +/-    2.15  0.040 / 0.070
G10     127.4          20.7               13.8 +/-    0.88      29.8 +/-    0.88  0.060 / 0.100
G11     254.7          22.4                9.9 +/-    2.30      20.6 +/-    2.30  0.050 / 0.100
G14     39.0           52.2               10.1 +/-    0.64      12.4 +/-    0.64  0.060 / 0.130
G22     314.5          47.4               10.3 +/-    0.91      13.5 +/-    0.91  0.070 / 0.150
G25     55.7           17.7               10.1 +/-    0.98      23.6 +/-    0.98  0.020 / 0.030
G26     152.1          20.9               15.5 +/-    2.24      33.4 +/-    2.24  0.030 / 0.030
G31     72.0           79.2               12.0 +/-    0.68      12.2 +/-    0.68  0.050 / 0.070
G32     60.2           35.8                9.8 +/-    0.53      15.3 +/-    0.53  0.050 / 0.080