PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-12:57:30
G01     90.5           31.5                6.0 +/-    0.55      10.1 +/-    0.55  0.040 / 0.060
G07     125.3          43.2                6.5 +/-    1.31       9.0 +/-    1.31  0.040 / 0.060
G11     67.7           37.7                4.2 +/-    1.04       6.3 +/-    1.04  0.020 / 0.030
G13     297.3          34.4                5.9 +/-    1.18       9.5 +/-    1.18  0.030 / 0.020
G17     213.7          55.8                7.3 +/-    0.78       8.7 +/-    0.78  0.040 / 0.050
G19     214.2          28.4                6.4 +/-    1.78      11.6 +/-    1.78  0.060 / 0.040
G28     348.6          61.6                4.2 +/-    0.52       4.8 +/-    0.52  0.060 / 0.110
G30     95.4           77.9                4.8 +/-    0.46       4.9 +/-    0.46  0.060 / 0.120