PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-19:27:40
G03     205.2          53.5               12.9 +/-    1.30      15.7 +/-    1.30  0.040 / 0.040
G07     259.2          16.7               13.7 +/-    1.10      32.6 +/-    1.10  0.040 / 0.050
G09     311.4          29.4               10.4 +/-    1.52      18.5 +/-    1.52  0.100 / 0.240
G16     88.9           64.8               14.0 +/-    0.76      15.3 +/-    0.76  0.110 / 0.290
G22     186.1          37.7               14.9 +/-    2.07      22.5 +/-    2.07  0.110 / 0.120
G23     335.1          63.7               12.7 +/-    0.90      14.0 +/-    0.90  0.070 / 0.090
G26     51.0           40.6               11.2 +/-    0.60      16.1 +/-    0.60  0.030 / 0.050
G27     131.2          12.9               15.3 +/-    2.23      40.0 +/-    2.23  0.030 / 0.050