PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-18:57:30
G07     280.9          31.6               20.1 +/-    2.19      34.1 +/-    2.19  0.060 / 0.090
G08     151.0          18.8               20.9 +/-    1.44      47.3 +/-    1.44  0.060 / 0.100
G09     320.0          52.3               16.6 +/-    0.61      20.4 +/-    0.61  0.100 / 0.200
G16     46.7           47.5               16.4 +/-    0.69      21.3 +/-    0.69  0.110 / 0.180
G22     178.3          12.8               20.0 +/-    1.71      52.4 +/-    1.71  0.050 / 0.050
G23     65.3           82.2               16.9 +/-    1.06      17.1 +/-    1.06  0.050 / 0.030
G26     42.9           18.5               14.3 +/-    4.18      32.6 +/-    4.18  0.210 / 0.220
G27     109.2          29.2               19.7 +/-    0.93      35.0 +/-    0.93  0.310 / 0.330