PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-21:12:30
G07     18.8           68.5               13.0 +/-    0.62      13.9 +/-    0.62  0.110 / 0.160
G08     64.8           50.2               13.0 +/-    1.07      16.3 +/-    1.07  0.110 / 0.260
G09     180.6          48.8               15.4 +/-    0.89      19.7 +/-    0.89  0.130 / 0.090
G11     131.5          27.8               14.7 +/-    1.11      27.0 +/-    1.11  0.130 / 0.110
G23     159.3          15.5               15.8 +/-    2.07      38.8 +/-    2.07  0.040 / 0.050
G27     39.6           15.3                9.3 +/-    2.87      22.9 +/-    2.87  0.050 / 0.040
G28     261.5          47.0               12.9 +/-    4.79      16.9 +/-    4.79  0.150 / 0.270
G30     324.9          54.3               12.1 +/-    0.65      14.5 +/-    0.65  0.120 / 0.390