PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-11:58:10
G01     84.8           32.6                3.5 +/-    0.62       5.9 +/-    0.62  0.210 / 0.430
G11     62.8           35.8                2.4 +/-    0.85       3.8 +/-    0.85  0.250 / 0.410
G13     291.8          35.8                5.7 +/-    1.78       8.9 +/-    1.78  0.090 / 0.090
G15     313.5          11.0               -0.6 +/-   14.22      -1.7 +/-   14.22  0.100 / 0.120
G17     218.0          60.6                7.7 +/-    0.51       8.7 +/-    0.51  0.030 / 0.030
G19     216.7          32.9                5.5 +/-    1.44       9.1 +/-    1.44  0.040 / 0.040
G28     358.5          61.2                4.5 +/-    0.33       5.0 +/-    0.33  0.040 / 0.050
G30     113.5          74.1                5.8 +/-    1.07       6.0 +/-    1.07  0.040 / 0.040