PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-21:43:10
G07     306.6          46.1               12.9 +/-    2.27      17.1 +/-    2.27  0.170 / 0.300
G08     130.6          40.3               15.6 +/-    1.19      22.6 +/-    1.19  0.080 / 0.300
G09     304.6          77.5               12.0 +/-    0.53      12.3 +/-    0.53  0.110 / 0.220
G16     41.9           25.0               10.9 +/-    3.23      21.3 +/-    3.23  0.120 / 0.250
G23     143.8          62.2               13.3 +/-    0.67      14.8 +/-    0.67  0.040 / 0.060
G27     78.1           36.9               12.9 +/-    0.94      19.8 +/-    0.94  0.040 / 0.080
G28     224.2          13.3               10.4 +/-    1.30      26.9 +/-    1.30  0.050 / 0.060
G30     287.7          25.7               10.6 +/-    1.45      20.3 +/-    1.45  0.050 / 0.070