PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-18:43:00
G03     186.1          13.4               15.1 +/-    1.93      39.1 +/-    1.93  0.060 / 0.090
G07     296.0          40.4               12.7 +/-    3.78      18.3 +/-    3.78  0.060 / 0.090
G08     141.5          31.5               16.7 +/-    1.51      28.4 +/-    1.51  0.030 / 0.030
G09     318.1          68.0               12.4 +/-    0.62      13.2 +/-    0.62  0.030 / 0.030
G16     41.8           32.6               11.0 +/-    1.03      18.3 +/-    1.03  0.030 / 0.030
G23     131.9          70.3               13.2 +/-    0.59      13.9 +/-    0.59  0.030 / 0.030
G27     91.2           35.8               14.1 +/-    0.98      22.1 +/-    0.98  0.220 / 0.260
G30     279.3          18.3               14.3 +/-    2.08      32.9 +/-    2.08  0.250 / 0.290