PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-10:13:10
G07     345.3          61.6                3.0 +/-    0.87       3.4 +/-    0.87  0.060 / 0.090
G08     87.5           51.6                3.9 +/-    0.68       4.8 +/-    0.68  0.050 / 0.080
G09     180.1          66.0                5.0 +/-    0.80       5.4 +/-    0.80  0.040 / 0.040
G11     140.6          16.0                6.0 +/-    1.60      14.6 +/-    1.60  0.030 / 0.040
G23     157.4          38.5                6.2 +/-    1.35       9.3 +/-    1.35  0.030 / 0.040
G27     50.1           28.1                2.0 +/-    0.82       3.6 +/-    0.82  0.030 / 0.040
G28     241.6          33.6                7.7 +/-    1.14      12.6 +/-    1.14  0.050 / 0.080
G30     304.7          36.7                3.0 +/-    1.48       4.7 +/-    1.48  0.060 / 0.080