PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-22:12:30
G02     213.9          58.1               14.2 +/-    0.66      16.4 +/-    0.66  0.050 / 0.110
G06     63.6           75.6               12.1 +/-    1.04      12.5 +/-    1.04  0.040 / 0.100
G12     318.0          34.6               10.1 +/-    0.85      16.1 +/-    0.85  0.080 / 0.090
G17     53.6           36.3               10.4 +/-    0.66      16.2 +/-    0.66  0.090 / 0.080
G19     34.4           52.0               11.4 +/-    0.48      14.0 +/-    0.48  0.040 / 0.050
G24     268.4          42.1               13.1 +/-    0.99      18.4 +/-    0.99  0.030 / 0.050
G28     121.1          15.3               14.0 +/-    2.10      34.7 +/-    2.10  0.090 / 0.240