PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-21:13:10
G02     201.1          27.3               14.4 +/-    1.36      26.6 +/-    1.36  0.080 / 0.110
G06     170.0          59.1               14.4 +/-    0.67      16.4 +/-    0.67  0.080 / 0.140
G17     28.8           54.7               13.6 +/-    1.24      16.3 +/-    1.24  0.050 / 0.080
G19     343.7          69.1               12.6 +/-    0.66      13.4 +/-    0.66  0.040 / 0.070
G24     304.4          34.4               10.5 +/-    1.41      16.9 +/-    1.41  0.040 / 0.040
G28     91.8           39.9               12.8 +/-    1.65      18.6 +/-    1.65  0.040 / 0.030