PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-01:57:50
G02     51.9           38.9               10.1 +/-    0.41      15.0 +/-    0.41  0.040 / 0.070
G05     76.5           66.9               11.9 +/-    0.38      12.8 +/-    0.38  0.040 / 0.070
G12     186.6          43.3               13.4 +/-    0.99      18.6 +/-    0.99  0.030 / 0.040
G21     263.2          10.6                0.9 +/-   24.21       2.6 +/-   24.21  0.020 / 0.040
G25     256.2          57.1               15.5 +/-    0.90      18.0 +/-    0.90  0.060 / 0.080
G29     321.2          44.4               11.5 +/-    0.77      15.7 +/-    0.77  0.070 / 0.080