PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-23:57:50
G03     231.8          66.3                7.1 +/-    0.83       7.7 +/-    0.83  0.040 / 0.040
G09     305.0          20.0                4.9 +/-    1.69      10.9 +/-    1.69  0.040 / 0.050
G14     102.4          12.2                8.5 +/-    2.21      22.5 +/-    2.21  0.030 / 0.040
G16     129.6          60.7               10.9 +/-    0.66      12.3 +/-    0.66  0.030 / 0.040
G22     194.0          53.0                8.9 +/-    0.71      10.9 +/-    0.71  0.160 / 0.230
G23     321.0          50.7                7.1 +/-    1.03       8.9 +/-    1.03  0.300 / 0.220
G26     67.0           51.9                6.7 +/-    1.13       8.3 +/-    1.13  0.110 / 0.200
G31     53.1           19.2                4.7 +/-    2.64      10.5 +/-    2.64  0.110 / 0.190