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               11.8 +/-    1.70      16.8 +/-    1.70  0.040 / 0.060
G03     315.0          25.9                9.3 +/-    1.39      17.7 +/-    1.39  0.040 / 0.060
G10     127.4          20.7               12.0 +/-    1.60      26.1 +/-    1.60  0.020 / 0.020
G11     254.7          22.4               10.9 +/-    4.46      22.7 +/-    4.46  0.020 / 0.020
G14     39.0           52.2               10.5 +/-    0.91      12.9 +/-    0.91  0.080 / 0.130
G22     314.5          47.4               10.8 +/-    0.56      14.1 +/-    0.56  0.080 / 0.210
G25     55.7           17.7               10.6 +/-    3.23      24.6 +/-    3.23  0.050 / 0.050
G26     152.1          20.9               13.5 +/-    1.32      29.0 +/-    1.32  0.040 / 0.050
G31     72.0           79.2               11.8 +/-    0.51      12.0 +/-    0.51  0.050 / 0.070
G32     60.2           35.8                9.9 +/-    1.48      15.6 +/-    1.48  0.060 / 0.060