PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-21:28:10
G01     241.9          30.0                9.3 +/-    1.92      16.2 +/-    1.92  0.040 / 0.030
G03     312.6          52.7                7.3 +/-    0.83       8.9 +/-    0.83  0.030 / 0.030
G14     69.2           35.6                7.9 +/-    0.76      12.5 +/-    0.76  0.120 / 0.200
G16     161.4          24.9               10.7 +/-    1.03      20.9 +/-    1.03  0.090 / 0.170
G22     287.5          72.7                8.4 +/-    0.70       8.7 +/-    0.70  0.050 / 0.060
G23     293.1          24.4                8.1 +/-    1.72      16.1 +/-    1.72  0.040 / 0.050
G26     129.0          44.6               11.2 +/-    0.48      15.2 +/-    0.48  0.090 / 0.140
G31     40.0           51.0                6.9 +/-    0.60       8.6 +/-    0.60  0.110 / 0.160
G32     84.5           17.9                7.6 +/-    1.69      17.6 +/-    1.69  0.060 / 0.090