PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/04-12:27:30
G02     199.8          14.1                4.3 +/-    1.15      10.9 +/-    1.15  0.140 / 0.160
G06     174.8          45.5                7.6 +/-    1.51      10.2 +/-    1.51  0.140 / 0.160
G13     233.8          17.6                4.2 +/-    1.91       9.8 +/-    1.91  0.050 / 0.090
G17     17.8           63.2                4.5 +/-    0.49       5.0 +/-    0.49  0.040 / 0.080
G19     306.8          72.1                5.1 +/-    0.58       5.3 +/-    0.58  0.020 / 0.050
G24     314.7          23.4                2.5 +/-    2.04       5.0 +/-    2.04  0.030 / 0.040
G28     81.1           42.8                4.3 +/-    0.60       6.0 +/-    0.60  0.130 / 0.320
G30     156.3          21.6                6.5 +/-    2.29      13.8 +/-    2.29  0.160 / 0.370