PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-23:57:50
G03     208.5          53.4                8.1 +/-    0.59       9.9 +/-    0.59  0.060 / 0.080
G07     260.9          18.4                7.7 +/-    1.02      17.5 +/-    1.02  0.060 / 0.090
G09     312.5          31.5                6.3 +/-    1.04      10.7 +/-    1.04  0.030 / 0.030
G16     90.7           66.3                7.7 +/-    0.42       8.4 +/-    0.42  0.040 / 0.030
G22     187.4          37.5                7.4 +/-    0.97      11.2 +/-    0.97  0.080 / 0.080
G23     333.9          63.4                5.6 +/-    0.57       6.2 +/-    0.57  0.060 / 0.090
G26     50.9           41.4                4.6 +/-    0.88       6.5 +/-    0.88  0.230 / 0.300
G27     129.4          14.2                9.2 +/-    2.78      23.4 +/-    2.78  0.210 / 0.250