PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-21:58:00
G03     192.4          27.0               13.8 +/-    3.12      25.7 +/-    3.12  0.240 / 0.360
G07     282.8          32.9                9.9 +/-    2.34      16.3 +/-    2.34  0.310 / 0.490
G08     148.0          21.2               14.5 +/-    2.02      31.0 +/-    2.02  0.060 / 0.090
G09     320.2          54.1               10.7 +/-    0.70      12.9 +/-    0.70  0.090 / 0.080
G16     46.1           47.5               10.2 +/-    0.66      13.3 +/-    0.66  0.110 / 0.170
G22     179.0          12.6               14.4 +/-    4.68      37.9 +/-    4.68  0.110 / 0.170
G23     66.8           82.9               10.5 +/-    1.25      10.6 +/-    1.25  0.050 / 0.090
G26     43.0           18.0                8.6 +/-    3.63      19.9 +/-    3.63  0.040 / 0.120
G27     107.0          30.2               14.3 +/-    1.26      25.0 +/-    1.26  0.040 / 0.060
G30     269.2          11.2               -5.3 +/-   36.47     -14.3 +/-   36.47  0.040 / 0.060