PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-23:12:20
G02     201.4          29.7               14.8 +/-    1.52      26.1 +/-    1.52  0.030 / 0.030
G06     171.0          60.3               13.0 +/-    0.71      14.8 +/-    0.71  0.040 / 0.030
G17     31.7           52.4               11.2 +/-    1.09      13.7 +/-    1.09  0.050 / 0.030
G19     347.9          68.3              -12.6 +/-    0.84     -13.5 +/-    0.84  0.040 / 0.040
G24     302.2          36.1               11.0 +/-    2.10      17.1 +/-    2.10  0.050 / 0.080
G28     94.3           38.3               13.0 +/-    1.22      19.5 +/-    1.22  0.050 / 0.080