PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-22:12:50
G01     247.9          33.7               10.2 +/-    1.01      16.6 +/-    1.01  0.030 / 0.040
G03     315.2          46.4                7.3 +/-    1.43       9.6 +/-    1.43  0.040 / 0.040
G11     235.4          11.3                9.4 +/-    2.74      25.4 +/-    2.74  0.060 / 0.130
G14     63.5           38.9                8.1 +/-    0.46      12.0 +/-    0.46  0.060 / 0.120
G16     164.7          18.8               12.1 +/-    2.72      27.4 +/-    2.72  0.040 / 0.050
G22     301.1          67.9                9.1 +/-    0.74       9.8 +/-    0.74  0.030 / 0.040
G23     288.5          20.5                9.4 +/-    1.14      20.5 +/-    1.14  0.100 / 0.350
G26     136.0          39.7               11.7 +/-    0.96      17.1 +/-    0.96  0.110 / 0.350
G31     39.8           57.7                8.5 +/-    0.45       9.8 +/-    0.45  0.050 / 0.110
G32     79.4           21.9                7.4 +/-    1.81      15.5 +/-    1.81  0.060 / 0.110