PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-17:28:10
G10     259.8          32.9               12.3 +/-    1.64      20.3 +/-    1.64  0.150 / 0.230
G13     46.4           24.6                9.6 +/-    1.79      18.8 +/-    1.79  0.100 / 0.230
G15     66.9           52.4               10.2 +/-    0.90      12.5 +/-    0.90  0.030 / 0.030
G16     291.3          12.5                9.8 +/-    1.52      25.9 +/-    1.52  0.040 / 0.030
G18     288.8          62.7               11.6 +/-    0.85      12.9 +/-    0.85  0.050 / 0.070
G20     48.7           41.8                9.3 +/-    1.03      13.1 +/-    1.03  0.040 / 0.070
G21     358.3          69.6               11.6 +/-    0.26      12.3 +/-    0.26  0.180 / 0.270
G26     262.1          11.1               11.3 +/-    1.76      30.9 +/-    1.76  0.150 / 0.270
G27     320.6          14.6                8.3 +/-    2.22      20.7 +/-    2.22  0.170 / 0.380
G29     164.6          33.3               13.5 +/-    0.83      22.2 +/-    0.83  0.210 / 0.390