PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-21:27:40
G08     307.8          19.9               12.4 +/-    2.16      27.4 +/-    2.16  0.080 / 0.090
G10     332.2          59.9               13.1 +/-    0.84      14.9 +/-    0.84  0.060 / 0.080
G14     218.7          32.9               16.1 +/-    1.02      26.7 +/-    1.02  0.050 / 0.090
G18     41.2           58.6               14.0 +/-    0.44      16.1 +/-    0.44  0.050 / 0.080
G21     134.9          53.3               16.3 +/-    0.68      19.8 +/-    0.68  0.040 / 0.060
G24     74.4           30.6               15.8 +/-    0.48      27.3 +/-    0.48  0.040 / 0.050
G27     271.7          37.4               13.6 +/-    0.97      20.6 +/-    0.97  0.040 / 0.050
G32     224.4          50.2               17.1 +/-    1.18      21.5 +/-    1.18  0.040 / 0.070