PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-17:28:00
G10     262.9          35.0               17.5 +/-    1.09      27.7 +/-    1.09  0.150 / 0.200
G13     44.4           22.3               14.3 +/-    2.25      29.7 +/-    2.25  0.240 / 0.140
G15     62.6           50.3               16.0 +/-    0.69      20.1 +/-    0.69  0.030 / 0.030
G16     288.1          11.9               14.9 +/-    6.31      39.8 +/-    6.31  0.030 / 0.040
G18     295.6          64.0               16.7 +/-    0.82      18.3 +/-    0.82  0.050 / 0.080
G20     51.0           39.3               14.6 +/-    1.89      21.5 +/-    1.89  0.050 / 0.080
G21     6.3            71.5               16.8 +/-    0.39      17.6 +/-    0.39  0.290 / 0.290
G24     124.5          11.7               22.9 +/-    5.10      61.5 +/-    5.10  0.180 / 0.280
G27     319.5          17.2               14.7 +/-    1.70      34.7 +/-    1.70  0.340 / 0.520
G29     165.2          30.0               18.1 +/-    2.23      31.7 +/-    2.23  0.320 / 0.530