PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-19:43:10
G10     263.4          35.2               22.6 +/-    1.63      35.7 +/-    1.63  0.100 / 0.130
G13     44.3           22.2               15.7 +/-    1.50      32.8 +/-    1.50  0.100 / 0.130
G15     62.6           50.6               20.4 +/-    0.64      25.5 +/-    0.64  0.080 / 0.080
G16     287.2          11.9               22.4 +/-    2.85      59.8 +/-    2.85  0.070 / 0.090
G18     295.1          63.7               20.4 +/-    0.55      22.4 +/-    0.55  0.040 / 0.080
G20     51.9           37.9               18.3 +/-    1.06      27.5 +/-    1.06  0.050 / 0.080
G21     2.3            71.1               20.9 +/-    1.01      22.0 +/-    1.01  0.040 / 0.050
G24     124.2          11.9               23.5 +/-    2.16      62.8 +/-    2.16  0.030 / 0.050
G27     319.3          17.6               20.8 +/-    0.99      48.5 +/-    0.99  0.190 / 0.560
G29     165.2          29.3               22.6 +/-    1.38      40.2 +/-    1.38  0.200 / 0.570