PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-18:43:00
G03     218.3          63.9               10.7 +/-    1.32      11.7 +/-    1.32  0.050 / 0.070
G09     305.8          20.7                9.3 +/-    2.07      20.2 +/-    2.07  0.070 / 0.070
G14     103.1          12.8               11.7 +/-    1.42      30.6 +/-    1.42  0.040 / 0.040
G16     117.4          62.3               14.6 +/-    0.82      16.3 +/-    0.82  0.040 / 0.050
G22     189.9          49.1               13.0 +/-    2.45      16.6 +/-    2.45  0.150 / 0.370
G23     324.8          54.6               11.4 +/-    0.56      13.6 +/-    0.56  0.120 / 0.250
G26     61.6           48.4               10.8 +/-    0.40      13.9 +/-    0.40  0.130 / 0.570
G31     55.0           15.3                8.1 +/-    1.04      20.0 +/-    1.04  0.120 / 0.540