PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-14:27:50
G01     52.4           26.7                7.0 +/-    1.04      13.2 +/-    1.04  0.100 / 0.300
G06     178.6          22.3                9.6 +/-    1.32      20.1 +/-    1.32  0.080 / 0.360
G07     145.0          12.4                9.6 +/-    2.51      25.4 +/-    2.51  0.060 / 0.110
G11     44.8           15.0                5.9 +/-    1.27      14.8 +/-    1.27  0.060 / 0.120
G13     255.8          31.7                8.5 +/-    1.08      14.4 +/-    1.08  0.040 / 0.060
G15     288.7          15.7                3.8 +/-    2.11       9.3 +/-    2.11  0.050 / 0.060
G17     314.3          79.6                8.0 +/-    0.81       8.1 +/-    0.81  0.020 / 0.030
G19     243.9          59.9                9.5 +/-    0.82      10.8 +/-    0.82  0.020 / 0.030
G28     48.7           53.7                6.7 +/-    0.48       8.0 +/-    0.48  0.150 / 0.460
G30     148.4          46.2                7.9 +/-    0.69      10.4 +/-    0.69  0.190 / 0.440