PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-09:27:40
G05     48.9           16.0                1.0 +/-    2.30       2.4 +/-    2.30  0.120 / 0.250
G10     235.9          11.5               -7.7 +/-   28.54     -20.7 +/-   28.54  0.240 / 0.170
G13     77.3           36.9                6.3 +/-    1.06       9.6 +/-    1.06  0.490 / 0.460
G15     122.4          52.1                5.9 +/-    0.79       7.2 +/-    0.79  0.260 / 0.450
G16     315.5          11.6                1.4 +/-    9.42       3.7 +/-    9.42  0.030 / 0.040
G20     14.4           72.6                2.8 +/-    0.42       3.0 +/-    0.42  0.030 / 0.040
G21     314.0          48.1                3.6 +/-    0.78       4.7 +/-    0.78  0.060 / 0.070
G25     200.4          11.6                3.0 +/-    2.15       8.1 +/-    2.15  0.060 / 0.050
G26     287.8          20.5                6.0 +/-    1.59      13.0 +/-    1.59  0.180 / 0.290
G29     154.4          71.6                5.6 +/-    0.22       5.9 +/-    0.22  0.190 / 0.260