PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-23:12:40
G01     230.2          20.7                8.7 +/-    2.09      18.9 +/-    2.09  0.030 / 0.030
G03     298.3          63.9                8.1 +/-    0.66       8.9 +/-    0.66  0.030 / 0.030
G14     82.3           27.0                5.9 +/-    2.36      11.1 +/-    2.36  0.060 / 0.090
G16     155.3          37.8                8.7 +/-    0.41      13.1 +/-    0.41  0.070 / 0.090
G22     235.0          74.2                8.4 +/-    0.35       8.7 +/-    0.35  0.030 / 0.080
G23     303.0          33.0                6.6 +/-    0.84      10.9 +/-    0.84  0.100 / 0.060
G26     110.7          53.1                8.4 +/-    0.67      10.2 +/-    0.67  0.180 / 0.270
G31     42.6           38.9                6.0 +/-    1.19       8.8 +/-    1.19  0.150 / 0.280
G32     95.2           10.1                8.2 +/-    0.96      22.8 +/-    0.96  0.130 / 0.270