PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-21:58:00
G05     46.0           27.9               11.0 +/-    0.61      20.2 +/-    0.61  0.120 / 0.380
G13     87.5           37.0               15.7 +/-    0.41      24.0 +/-    0.41  0.120 / 0.300
G15     135.9          46.4               18.1 +/-    0.67      24.0 +/-    0.67  0.050 / 0.080
G18     238.8          35.6               14.7 +/-    1.74      23.0 +/-    1.74  0.050 / 0.090
G20     21.6           72.9               14.4 +/-    0.36      14.9 +/-    0.36  0.100 / 0.260
G21     306.2          42.8               13.7 +/-    0.98      19.1 +/-    0.98  0.100 / 0.190
G25     199.9          14.5               19.1 +/-    1.61      48.1 +/-    1.61  0.020 / 0.030
G26     297.7          19.3               12.5 +/-    1.30      28.0 +/-    1.30  0.020 / 0.030
G29     145.4          77.4               14.5 +/-    0.52      14.8 +/-    0.52  0.050 / 0.090