PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-21:27:50
G08     309.4          19.2               15.1 +/-    1.56      33.9 +/-    1.56  0.050 / 0.070
G10     328.7          59.3               12.6 +/-    0.93      14.4 +/-    0.93  0.050 / 0.070
G14     217.7          31.2               19.6 +/-    1.33      33.4 +/-    1.33  0.020 / 0.040
G15     46.6           11.1               12.3 +/-    0.93      33.4 +/-    0.93  0.020 / 0.030
G18     38.2           59.4               13.2 +/-    0.40      15.0 +/-    0.40  0.040 / 0.050
G21     133.1          55.1               15.6 +/-    0.52      18.6 +/-    0.52  0.030 / 0.050
G24     76.6           30.6               14.7 +/-    1.14      25.4 +/-    1.14  0.030 / 0.060
G27     274.1          37.7               15.3 +/-    1.07      23.1 +/-    1.07  0.030 / 0.050
G32     222.8          48.4               16.9 +/-    0.66      21.8 +/-    0.66  0.090 / 0.220