Declination

IGRF-11 observed difference Epoch Station decl.(deg) decl.(deg) model-obs. 

1981.0 	THL -73.87 -74.35 +0.48 
 	GDH -48.08 -48.02 +0.06 

1983.0 	THL -73.18 -73.64 +0.46 
 	GDH -47.53 -47.46 +0.07 

1985.0 	THL -72.52 -73.03 +0.51 
 	GDH -46.98 -46.96 +0.02 
 	NAQ -33.23 -32.93 -0.30 

1987.0 	THL -71.72 -72.33 +0.61 
 	GDH -46.33 -46.39 +0.06 
 	NAQ -32.73 -32.40 -0.33 

1989.0 	THL -70.92 -71.48 +0.56 
 	GDH -45.70 -45.79 +0.09 
 	NAQ -32.22 -31.87 -0.35 

1991.0 	THL -70.00 -70.63 +0.63 
	KUV -55.40 -58.4 +3.0 
	UPN -51.85 -52.1 +0.25 
 	UMQ -46.23 -46.4 +0.2 
 	GDH -45.02 -45.17 +0.15 
 	STF -40.57 -41.8 +1.2 
 	SKT -39.50 -40.4 +0.9 
 	GHB -37.47 -39.4 +1.9 
 	FHB -34.23 -36.5 +2.3 
 	NAQ -31.68 -31.37 -0.31 

1993.0 	THL -68.97 -69.52 +0.55 
 	GDH -44.30 -44.51 +0.21 
	NAQ -31.13 -30.84 -0.29 

1995.0 	THL -67.92 -68.17 +0.25 
 	GDH -43.58 -43.77 +0.19 
 	NAQ -30.60 -30.25 -0.35 

1997.0 	THL -66.13 -66.54 +0.41 
 	GDH -42.60 -42.91 +0.31 
 	NAQ -29.93 -29.60 -0.33 

1999.0 	THL -64.33 -64.64 +0.31 
 	GDH -41.62 -41.95 +0.33 
 	NAQ -29.27 -28.89 -0.38 

2001.0 	THL -62.42 -62.65 +0.23 
 	GDH -40.58 -40.95 +0.37 
 	NAQ -28.58 -28.16 -0.42