PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-10:28:10
G07     354.9          64.0                3.5 +/-    0.39       3.9 +/-    0.39  0.030 / 0.040
G08     79.0           51.1                4.4 +/-    0.32       5.5 +/-    0.32  0.030 / 0.040
G09     178.5          60.4                7.5 +/-    1.18       8.5 +/-    1.18  0.050 / 0.040
G11     137.0          19.2                3.1 +/-    2.80       7.0 +/-    2.80  0.050 / 0.040
G23     158.7          33.3                5.9 +/-    1.14       9.7 +/-    1.14  0.060 / 0.110
G27     46.5           24.9                4.2 +/-    0.77       8.2 +/-    0.77  0.060 / 0.100
G28     246.3          37.4                7.3 +/-    0.88      11.1 +/-    0.88  0.130 / 0.410
G30     308.7          40.1                3.8 +/-    1.02       5.5 +/-    1.02  0.110 / 0.350