PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-22:42:50
G02     215.9          60.8               14.8 +/-    0.44      16.7 +/-    0.44  0.050 / 0.060
G06     56.9           73.7               13.3 +/-    0.40      13.8 +/-    0.40  0.050 / 0.080
G12     318.8          36.7               10.3 +/-    1.76      15.9 +/-    1.76  0.150 / 0.360
G17     55.6           35.0               10.1 +/-    0.90      16.1 +/-    0.90  0.100 / 0.340
G19     37.7           50.3               10.6 +/-    0.37      13.3 +/-    0.37  0.080 / 0.090
G24     265.1          41.6               14.1 +/-    1.30      20.0 +/-    1.30  0.060 / 0.090
G28     122.8          13.4               15.7 +/-    1.16      40.6 +/-    1.16  0.040 / 0.050