PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-23:43:10
G03     229.0          65.5                7.9 +/-    0.98       8.6 +/-    0.98  0.040 / 0.050
G09     305.6          20.8                8.5 +/-    1.18      18.3 +/-    1.18  0.040 / 0.070
G14     103.2          11.6                7.7 +/-    3.17      20.7 +/-    3.17  0.120 / 0.240
G16     127.0          61.5               12.3 +/-    0.66      13.7 +/-    0.66  0.160 / 0.240
G22     193.3          51.8               10.8 +/-    0.90      13.3 +/-    0.90  0.120 / 0.650
G23     321.9          51.7                8.3 +/-    1.38      10.3 +/-    1.38  0.120 / 0.490
G26     65.3           51.2                7.5 +/-    0.71       9.3 +/-    0.71  0.030 / 0.050
G31     53.7           18.3                4.6 +/-    0.59      10.4 +/-    0.59  0.040 / 0.060