Table 9: Global VLBI array rms astrometric errors (in $\mu$ as) for a relative source separation $(\alpha -\alpha _0)\cos\delta_0 = 1\hbox{$^\circ$ }$ . The individual astrometric error contribution from wet troposphere uncertainties is given separately along with the total astrometric errors when all model parameters are perturbed together.
Declination of source

$-25\hbox {$^\circ $ }$ $0\hbox{$^\circ$ }$ $25\hbox{$^\circ$ }$ $50\hbox {$^\circ $ }$ $75\hbox{$^\circ$ }$ $85\hbox {$^\circ $ }$

Error component $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$ $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$ $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$ $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$ $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$ $\Delta\alpha \cos\delta \hfil$ $\Delta \delta$

Wet troposphere (mean) 71 76 32 42 26 34 23 13 22 6 27 9

Total (mean wtrp) 82 67 34 46 24 44 34 33 64 76 196 203

**Table 9:** Global VLBI array rms astrometric errors (in $\mu$ as) for a relative source separation $(\alpha -\alpha _0)\cos\delta_0 = 1\hbox{$^\circ$ }$ . The individual astrometric error contribution from wet troposphere uncertainties is given separately along with the total astrometric errors when all model parameters are perturbed together.
	Declination of source
	$-25\hbox {$^\circ $ }$		$0\hbox{$^\circ$ }$		$25\hbox{$^\circ$ }$	$50\hbox {$^\circ $ }$		$75\hbox{$^\circ$ }$		$85\hbox {$^\circ $ }$
Error component	$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$		$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$	$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$		$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$	$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$	$\Delta\alpha \cos\delta \hfil$	$\Delta \delta$
Wet troposphere (mean)	71	76		32	42	26	34		23	13	22	6	27	9
Total (mean wtrp)	82	67		34	46	24	44		34	33	64	76	196	203

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