PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-18:28:10
G01     228.1          18.7               11.4 +/-    3.03      25.9 +/-    3.03  0.030 / 0.020
G03     287.0          69.0               10.3 +/-    0.68      10.9 +/-    0.68  0.040 / 0.030
G14     84.0           26.9               10.5 +/-    2.19      19.6 +/-    2.19  0.040 / 0.080
G16     149.5          42.6               13.3 +/-    0.60      18.6 +/-    0.60  0.040 / 0.060
G22     217.3          72.0               13.2 +/-    0.54      13.8 +/-    0.54  0.070 / 0.080
G23     306.5          36.9               11.3 +/-    1.61      17.4 +/-    1.61  0.060 / 0.080
G26     100.7          53.7               12.5 +/-    1.08      15.1 +/-    1.08  0.080 / 0.130
G31     44.5           33.6                9.3 +/-    1.63      15.1 +/-    1.63  0.110 / 0.160