PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-22:28:00
G07     15.8           68.2               11.2 +/-    0.74      12.0 +/-    0.74  0.130 / 0.110
G08     65.5           50.1               12.3 +/-    0.91      15.6 +/-    0.91  0.090 / 0.100
G09     180.9          50.2               13.5 +/-    1.02      17.0 +/-    1.02  0.090 / 0.190
G11     133.1          26.8               12.5 +/-    1.84      23.5 +/-    1.84  0.110 / 0.410
G23     159.5          17.4               13.9 +/-    1.64      32.7 +/-    1.64  0.050 / 0.040
G27     40.1           16.2                9.2 +/-    2.03      22.2 +/-    2.03  0.060 / 0.040
G28     260.0          46.3               12.0 +/-    3.83      15.9 +/-    3.83  0.100 / 0.160
G30     324.6          54.1               10.0 +/-    0.48      12.1 +/-    0.48  0.110 / 0.170