PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-22:27:40
G10     291.9          49.4               13.5 +/-    2.82      17.1 +/-    2.82  0.160 / 0.090
G15     46.8           31.4               10.8 +/-    1.30      18.3 +/-    1.30  0.090 / 0.040
G18     350.6          66.6               13.0 +/-    0.33      14.0 +/-    0.33  0.050 / 0.030
G20     69.2           19.9               11.0 +/-    1.04      24.2 +/-    1.04  0.040 / 0.040
G21     88.5           74.6               13.9 +/-    0.53      14.4 +/-    0.53  0.070 / 0.140
G24     102.5          25.1               15.3 +/-    0.78      29.8 +/-    0.78  0.110 / 0.130
G27     302.3          33.7               11.8 +/-    1.26      19.2 +/-    1.26  0.060 / 0.090
G32     210.2          26.1               21.2 +/-    0.98      40.4 +/-    0.98  0.050 / 0.070