PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-21:57:20
G02     52.5           39.0                9.9 +/-    0.89      14.6 +/-    0.89  0.040 / 0.040
G05     72.6           66.6               10.8 +/-    0.44      11.7 +/-    0.44  0.030 / 0.040
G12     183.8          38.7               14.0 +/-    1.90      20.8 +/-    1.90  0.060 / 0.080
G21     264.9          11.7               14.8 +/-    5.23      39.7 +/-    5.23  0.050 / 0.090
G25     249.5          56.4               12.4 +/-    0.68      14.6 +/-    0.68  0.050 / 0.090
G29     322.5          46.1               10.5 +/-    1.03      13.9 +/-    1.03  0.050 / 0.090