PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-10:12:30
G10     250.6          26.3                4.7 +/-    1.58       8.9 +/-    1.58  0.040 / 0.050
G13     54.0           30.5                3.8 +/-    0.96       6.6 +/-    0.96  0.030 / 0.040
G15     83.8           56.5                4.0 +/-    0.44       4.6 +/-    0.44  0.040 / 0.050
G16     296.7          14.9                3.3 +/-    2.71       8.2 +/-    2.71  0.040 / 0.050
G20     37.4           54.5                2.5 +/-    0.44       3.0 +/-    0.44  0.100 / 0.390
G21     336.4          61.5                3.9 +/-    0.63       4.3 +/-    0.63  0.110 / 0.360
G26     267.6          15.6                5.3 +/-    2.18      13.1 +/-    2.18  0.070 / 0.120
G29     164.2          48.5                6.4 +/-    1.02       8.2 +/-    1.02  0.100 / 0.110