Raw position errors from 2006a_astro solution for all sources

Formal uncertainties reported by Solve. Came from SNR and additive reweighting throuth the error propagation law. The vertical axis runs over the number of sources. The horisontal axis runs over formal errors in mas.

Raw position errors from 2006a_astro solution for ICRF-1 sources

Formal uncertainties reported by Solve. Came from SNR and additive reweighting throuth the error propagation law. The vertical axis runs over the number of sources. The horisontal axis runs over formal errors in mas.

Position errors from 2006a_astro solution with traditional reweighting

Position errors after aplying reweiting Err = sqrt ( 1.5*σ)2 + (0.25 mas)2 ) The vertical axis runs over the number of sources. The horisontal axis runs over formal errors in mas.

Position errors from 2006a_astro solution with traditional reweighting for the sources from ICRF-1

Position errors after aplying reweiting Err = sqrt ( 1.5*σ)2 + (0.25 mas)2 ) The vertical axis runs over the number of sources. The horisontal axis runs over formal errors in mas.

Position errors from 2006a_astro solution with advanced reweighting

Position errors after aplying reweiting Err = sqrt ( 1.5*σ)2 + (b(δ)2 )
where b(δ) varies in the range [0.2, 0.7]mas depending on declination.

Position errors statistics

The number of sources with the major error semi-axis less than the limit of 0.1 mas, 0.3 mas, and 1.0 mas:

Errors type All sources Sources from ICRF-1
  0.1 mas 0.3 mas 1.0 mas 0.1 mas 0.3 mas 1.0 mas
     
Raw errors   500     1200     2400     450     500     615  
Traditional reweighting   0     513     2070     0     468     600  
Advanced reweighting   0     128     1920        

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Last update: 2006.10.04_21:19:10
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