PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-01:27:20
G02     45.5           44.6                8.4 +/-    0.62      11.4 +/-    0.62  0.040 / 0.060
G05     100.0          68.9               10.5 +/-    0.69      11.2 +/-    0.69  0.030 / 0.060
G12     188.8          52.1               11.4 +/-    1.88      14.1 +/-    1.88  0.030 / 0.040
G25     272.7          58.1               11.0 +/-    1.03      12.7 +/-    1.03  0.040 / 0.040
G29     316.1          37.7               10.2 +/-    0.97      15.4 +/-    0.97  0.040 / 0.070