PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-03:27:30
G02     199.7          23.5                5.9 +/-    1.40      12.0 +/-    1.40  0.040 / 0.050
G06     173.3          53.2                7.5 +/-    1.10       9.1 +/-    1.10  0.040 / 0.040
G13     227.3          12.5                3.9 +/-    5.28      10.3 +/-    5.28  0.030 / 0.050
G17     20.7           60.3                5.1 +/-    1.27       5.8 +/-    1.27  0.040 / 0.060
G19     327.4          70.9                4.1 +/-    1.00       4.3 +/-    1.00  0.040 / 0.110
G24     310.0          29.6                1.8 +/-    1.19       3.1 +/-    1.19  0.040 / 0.120
G28     89.6           38.6                6.1 +/-    1.03       9.1 +/-    1.03  0.110 / 0.590
G30     155.9          10.1                7.3 +/-    1.97      20.3 +/-    1.97  0.120 / 0.540