PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-09:27:30
G07     344.0          61.3                4.5 +/-    0.71       5.1 +/-    0.71  0.060 / 0.080
G08     88.4           51.6                5.5 +/-    0.46       6.7 +/-    0.46  0.060 / 0.090
G09     181.3          67.0                5.5 +/-    0.56       6.0 +/-    0.56  0.040 / 0.040
G11     141.1          15.7                6.8 +/-    1.97      16.6 +/-    1.97  0.030 / 0.040
G23     157.3          39.1                6.7 +/-    1.31       9.9 +/-    1.31  0.030 / 0.030
G27     50.5           28.4                2.2 +/-    0.84       4.1 +/-    0.84  0.040 / 0.050
G28     241.2          33.3                7.0 +/-    1.14      11.5 +/-    1.14  0.050 / 0.040
G30     304.5          36.6                3.2 +/-    1.67       4.9 +/-    1.67  0.040 / 0.060