PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-04:42:50
G07     342.1          60.9                4.0 +/-    0.46       4.5 +/-    0.46  0.110 / 0.160
G08     89.1           52.2               22.4 +/-    0.42      27.5 +/-    0.42  0.090 / 0.120
G09     186.0          68.6                5.3 +/-    0.39       5.7 +/-    0.39  0.030 / 0.040
G11     142.3          15.8                6.3 +/-    2.60      15.5 +/-    2.60  0.030 / 0.030
G23     157.4          38.0                6.8 +/-    0.82      10.2 +/-    0.82  0.050 / 0.040
G27     50.1           28.1                2.8 +/-    1.99       5.2 +/-    1.99  0.040 / 0.040
G28     241.7          34.0                5.0 +/-    1.33       8.1 +/-    1.33  0.020 / 0.030
G30     306.2          38.8                3.4 +/-    1.33       5.0 +/-    1.33  0.030 / 0.020