PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-21:27:50
G02     200.5          24.0               17.7 +/-    1.84      35.4 +/-    1.84  0.150 / 0.330
G06     168.3          57.7               15.5 +/-    1.26      18.0 +/-    1.26  0.180 / 0.330
G13     225.4          11.2               15.4 +/-    5.69      41.9 +/-    5.69  0.080 / 0.220
G17     20.5           60.1               13.2 +/-    0.58      15.0 +/-    0.58  0.080 / 0.190
G19     327.1          70.3               12.9 +/-    0.69      13.6 +/-    0.69  0.050 / 0.040
G24     307.9          31.8               11.0 +/-    2.16      18.5 +/-    2.16  0.040 / 0.040
G28     91.3           37.9               13.3 +/-    0.93      20.1 +/-    0.93  0.040 / 0.100
G30     157.2          11.3               17.5 +/-    2.99      47.3 +/-    2.99  0.040 / 0.120