PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-08:57:30
G01     42.8           18.4                3.0 +/-    1.03       6.8 +/-    1.03  0.060 / 0.100
G06     178.6          33.1                5.8 +/-    2.06       9.6 +/-    2.06  0.050 / 0.110
G13     241.7          24.0                3.9 +/-    1.78       7.8 +/-    1.78  0.080 / 0.160
G15     273.4          13.5                3.7 +/-    1.40       9.5 +/-    1.40  0.090 / 0.180
G17     359.8          71.7                5.0 +/-    0.99       5.3 +/-    0.99  0.050 / 0.030
G19     272.5          68.9                4.4 +/-    0.70       4.7 +/-    0.70  0.030 / 0.020
G24     317.9          15.6                2.6 +/-    2.15       6.4 +/-    2.15  0.220 / 0.430
G28     68.6           47.7                3.8 +/-    0.38       4.9 +/-    0.38  0.240 / 0.260
G30     153.4          29.9                8.7 +/-    1.60      15.2 +/-    1.60  0.050 / 0.100