PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/13-19:42:50
G10     280.4          45.4               15.1 +/-    1.81      20.2 +/-    1.81  0.090 / 0.140
G15     51.7           43.1               14.0 +/-    0.99      19.4 +/-    0.99  0.090 / 0.130
G20     322.0          64.2               14.4 +/-    0.65      15.8 +/-    0.65  0.030 / 0.040
G21     45.6           76.8               15.5 +/-    1.17      15.9 +/-    1.17  0.030 / 0.040
G24     107.1          20.8               14.7 +/-    1.40      31.8 +/-    1.40  0.040 / 0.050
G27     312.9          26.1               14.8 +/-    1.20      28.2 +/-    1.20  0.040 / 0.040
G29     168.5          19.6               13.0 +/-    1.11      28.9 +/-    1.11  0.110 / 0.180
G32     206.2          20.3               15.7 +/-    3.24      34.3 +/-    3.24  0.090 / 0.180