--- Begin Forwarded Message --- Date: Tue, 10 Oct 2000 09:05:23 +0300 From: Lauri Kreen <[log in to unmask]> Subject: Re: Magnetic Variation Sender: Lauri Kreen <[log in to unmask]> > I saw this list of addresses on the web. I'm doing a flight planning > spreadsheet for my personal use and need to find a formula to calculate > (or estimate) magnetic variation for a given lat/long. I'm hoping that > someone among you have that formula and would be willing to tell me what > it is or at least point me to where I could find it. Formula: http://www.ngdc.noaa.gov/IAGA/wg8/igrf2000.html On-Line models (Calculators): http://unixb.nerc-murchison.ac.uk/gifs/igrf_form.html http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnth1.pl http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnthlng.pl http://nssdc.gsfc.nasa.gov/space/model/models/igrf.html http://nssdc.gsfc.nasa.gov/space/cgm/cgm.html http://nssdc.gsfc.nasa.gov/space/cgm/t96.html http://nssdc.gsfc.nasa.gov/space/cgm/t89.html http://www.geolab.nrcan.gc.ca/geomag/e_cgrf.html http://swdcdb.kugi.kyoto-u.ac.jp/igrf/point/ http://geomag.usgs.gov/Freeware/geomagAWT.html http://www.best.com/~williams/magvar.html http://www.pangolin.co.nz/almanac/index.asp http://www.pangolin.co.nz/almanac/magvar.asp?LatDeg=0&LatMin=0&LatNam=N&LngDeg=0&LngMin=0&LngNam=E&DeltaHr=0&DeltaMi=0&DeltaNa=A Download Freeware: http://geomag.usgs.gov/Freeware/geomagix.htm http://www.ngdc.noaa.gov/seg/potfld/WMMsoftware.shtml http://www.ngdc.noaa.gov/seg/potfld/magmodel.shtml http://www.best.com/~williams/ http://www.datacache.com/sw.htm ftp://ftp.ngdc.noaa.gov/Solid_Earth/Mainfld_Mag/DoD_Model/Basic_Software/dmabasic.exe With best regards Lauri Kreen --- End Forwarded Message ---
