PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-23:28:00
G10     255.8          29.9               15.8 +/-    2.04      27.7 +/-    2.04  0.090 / 0.280
G13     49.6           27.8               13.2 +/-    1.50      24.3 +/-    1.50  0.130 / 0.300
G15     77.0           56.5               16.3 +/-    0.79      19.1 +/-    0.79  0.040 / 0.040
G16     292.1          13.9               12.3 +/-    2.05      31.5 +/-    2.05  0.040 / 0.040
G18     278.0          58.9               13.9 +/-    1.94      15.9 +/-    1.94  0.160 / 0.250
G20     47.4           42.6               13.5 +/-    0.84      18.8 +/-    0.84  0.150 / 0.230
G21     342.3          64.8               14.5 +/-    0.57      15.9 +/-    0.57  0.380 / 0.260
G26     264.7          13.0               14.0 +/-    1.15      36.6 +/-    1.15  0.310 / 0.430
G27     321.7          11.4               -1.3 +/-   32.89      -3.6 +/-   32.89  0.050 / 0.070
G29     165.1          40.3               15.8 +/-    1.59      22.8 +/-    1.59  0.040 / 0.070