PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-20:58:10
G03     215.6          60.9               10.8 +/-    1.63      12.2 +/-    1.63  0.050 / 0.060
G07     253.9          12.5                9.7 +/-    2.40      25.6 +/-    2.40  0.060 / 0.060
G09     308.0          24.0                8.3 +/-    1.35      16.7 +/-    1.35  0.030 / 0.040
G16     110.4          64.3               12.8 +/-    0.64      14.0 +/-    0.64  0.040 / 0.040
G22     189.6          45.8               11.0 +/-    1.14      14.7 +/-    1.14  0.120 / 0.230
G23     327.1          56.9                9.7 +/-    0.77      11.3 +/-    0.77  0.050 / 0.170
G26     57.6           46.6                8.1 +/-    0.63      10.7 +/-    0.63  0.230 / 0.250
G31     57.0           13.2                6.1 +/-    2.13      15.9 +/-    2.13  0.260 / 0.230