PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-18:12:50
G02     54.5           37.3               12.8 +/-    1.16      19.5 +/-    1.16  0.060 / 0.050
G05     76.8           69.4               14.2 +/-    0.76      15.1 +/-    0.76  0.050 / 0.060
G12     186.9          39.4               14.8 +/-    1.16      21.7 +/-    1.16  0.050 / 0.070
G13     134.5          10.9               14.0 +/-   21.25      38.3 +/-   21.25  0.060 / 0.060
G20     204.6          53.5               17.1 +/-    0.53      20.7 +/-    0.53  0.150 / 0.530
G21     266.7          14.8               12.3 +/-    3.01      30.6 +/-    3.01  0.100 / 0.500
G25     241.6          55.4               15.8 +/-    2.02      18.7 +/-    2.02  0.060 / 0.060
G29     327.4          52.8               11.0 +/-    1.26      13.4 +/-    1.26  0.060 / 0.050