PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-17:28:10
G02     57.5           35.7               10.8 +/-    1.20      16.9 +/-    1.20  0.240 / 0.420
G05     61.0           64.3               11.2 +/-    0.32      12.3 +/-    0.32  0.160 / 0.300
G12     182.6          30.5               14.5 +/-    2.14      25.1 +/-    2.14  0.100 / 0.090
G13     127.8          15.2               14.2 +/-    2.26      35.3 +/-    2.26  0.090 / 0.070
G21     271.5          17.4               13.1 +/-    1.19      30.8 +/-    1.19  0.030 / 0.030
G25     232.6          51.5               14.0 +/-    2.43      17.4 +/-    2.43  0.030 / 0.030
G29     328.0          53.9               10.9 +/-    0.54      13.1 +/-    0.54  0.080 / 0.090