PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-06:57:20
G07     335.7          59.3                4.3 +/-    0.69       4.9 +/-    0.69  0.030 / 0.030
G08     103.8          52.0                5.8 +/-    0.96       7.1 +/-    0.96  0.040 / 0.050
G09     188.3          73.5                4.4 +/-    0.59       4.6 +/-    0.59  0.090 / 0.120
G11     147.0          13.5                3.8 +/-    1.65       9.7 +/-    1.65  0.110 / 0.120
G23     154.9          40.5                4.6 +/-    0.95       6.6 +/-    0.95  0.030 / 0.030
G27     55.8           32.0                2.8 +/-    1.86       4.6 +/-    1.86  0.030 / 0.030
G28     235.0          22.5                4.3 +/-    1.74       8.8 +/-    1.74  0.150 / 0.190
G30     300.8          33.8                2.6 +/-    1.23       4.2 +/-    1.23  0.210 / 0.190