PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-21:57:30
G03     214.3          59.2                9.5 +/-    1.39      10.9 +/-    1.39  0.040 / 0.040
G07     257.0          17.1                9.0 +/-    2.06      21.4 +/-    2.06  0.040 / 0.050
G09     310.4          28.8                7.5 +/-    2.33      13.5 +/-    2.33  0.140 / 0.220
G16     102.6          64.6               10.6 +/-    0.55      11.6 +/-    0.55  0.130 / 0.190
G22     189.5          42.8               10.0 +/-    0.76      13.9 +/-    0.76  0.040 / 0.050
G23     326.8          57.1                9.5 +/-    0.99      11.0 +/-    0.99  0.040 / 0.040
G26     56.9           46.9                6.9 +/-    1.37       9.1 +/-    1.37  0.040 / 0.030
G31     57.4           15.0                5.3 +/-    2.40      13.1 +/-    2.40  0.050 / 0.030