PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-16:43:00
G02     63.8           29.0                8.7 +/-    0.94      15.6 +/-    0.94  0.030 / 0.040
G05     54.3           59.7                9.7 +/-    0.72      11.0 +/-    0.72  0.030 / 0.040
G12     184.9          28.3               12.0 +/-    3.09      21.7 +/-    3.09  0.100 / 0.230
G13     126.0          18.3               12.5 +/-    1.80      28.7 +/-    1.80  0.070 / 0.220
G15     160.7          16.0               15.4 +/-    2.14      37.3 +/-    2.14  0.060 / 0.130
G20     211.1          64.7               12.8 +/-    0.63      14.0 +/-    0.63  0.070 / 0.140
G21     275.9          22.4                9.7 +/-    2.20      20.0 +/-    2.20  0.100 / 0.440
G25     227.7          47.8               12.2 +/-    1.27      15.9 +/-    1.27  0.140 / 0.500
G29     337.8          64.6                8.7 +/-    0.40       9.5 +/-    0.40  0.040 / 0.060