PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-20:58:00
G03     209.0          56.0                9.6 +/-    0.52      11.3 +/-    0.52  0.050 / 0.060
G07     257.8          15.7               10.1 +/-    3.54      24.6 +/-    3.54  0.070 / 0.070
G09     310.6          28.0                7.6 +/-    0.71      13.9 +/-    0.71  0.200 / 0.300
G16     96.2           65.4               -2.1 +/-    0.93      -2.3 +/-    0.93  0.180 / 0.250
G22     187.6          40.4               10.9 +/-    0.84      15.7 +/-    0.84  0.050 / 0.030
G23     331.9          61.3                8.4 +/-    0.62       9.5 +/-    0.62  0.050 / 0.030
G26     52.8           42.7                7.7 +/-    1.04      10.7 +/-    1.04  0.170 / 0.410
G27     132.4          11.7               12.0 +/-    3.14      32.4 +/-    3.14  0.130 / 0.310
G31     60.0           9.6                 6.4 +/-    1.64      17.9 +/-    1.64  0.060 / 0.210