PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-12:57:30
G01     81.4           32.9                5.1 +/-    0.94       8.4 +/-    0.94  0.030 / 0.040
G07     131.4          36.5                6.0 +/-    0.64       9.3 +/-    0.64  0.030 / 0.030
G11     60.0           34.1                3.9 +/-    1.03       6.2 +/-    1.03  0.050 / 0.080
G13     288.5          36.4                4.8 +/-    1.43       7.5 +/-    1.43  0.060 / 0.080
G15     311.8          11.8                2.0 +/-    1.40       5.4 +/-    1.40  0.150 / 0.250
G17     220.9          63.4                7.2 +/-    0.60       8.0 +/-    0.60  0.220 / 0.250
G19     218.2          35.5                6.4 +/-    0.48      10.0 +/-    0.48  0.060 / 0.110
G28     3.5            60.8                4.8 +/-    0.87       5.4 +/-    0.87  0.040 / 0.120
G30     119.8          72.1                5.5 +/-    0.79       5.7 +/-    0.79  0.050 / 0.050