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               13.8 +/-    1.64      18.3 +/-    1.64  0.120 / 0.250
G08     130.6          40.3               15.1 +/-    1.19      21.9 +/-    1.19  0.110 / 0.190
G09     304.6          77.5               11.2 +/-    0.59      11.5 +/-    0.59  0.050 / 0.090
G16     41.9           25.0               10.2 +/-    2.37      20.0 +/-    2.37  0.050 / 0.090
G23     143.8          62.2               13.7 +/-    1.03      15.3 +/-    1.03  0.100 / 0.640
G27     78.1           36.9               10.6 +/-    1.13      16.2 +/-    1.13  0.110 / 0.530
G28     224.2          13.3                9.5 +/-    3.99      24.7 +/-    3.99  0.050 / 0.090
G30     287.7          25.7               12.1 +/-    1.29      23.2 +/-    1.29  0.050 / 0.070