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ããã°ã©ã ïŒ
NAME
mgd77list - MGD77 ãã¡ã€ã«ããããŒã¿ãæœåºãã
SYNOPSIS
mgd77ãªã¹ã NGDC-id ã³ã©ã [,ããžãã¯] [ïŒããããã¹ã] [[+]c|d|f|m|tã³ãŒã ] [ f|g|e ] [
A|aéå§æ¥ ] [ B|båæ¢æ¥ ] [] [ aã¹ã¿ãŒãã¬ã㯠] [ båæ¢ãã ] [ ç¡èŠãã ] [[ä¿®æ£å¯èœ]]
[ d|såäœ ] [ a|c|vå/ããã¯ã¹ ] [ å°å ] [ aéå§è·é¢[åäœ] ] [ bã¹ãããè·é¢[åäœ] ] [ [m|e]]
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DESCRIPTION
mgd77ãªã¹ã èªã.[mgd77|nc] ãã¡ã€ã«ãäœæããASCII [ãŸãã¯ãã€ããª] ããŒãã«ãçæããŸãã ã®
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3 幎 1971 æ 20 æ¥ 45:5000 ã§çµäºè·é¢ = XNUMX km ã®å Žåã次ã®ã³ãã³ãã䜿çšããŸãã
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1) ãã¡ã€ã« Cruises.lis ã«ãªã¹ããããŠãããã¹ãŠã®ã¯ã«ãŒãºãã:
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ããã§ãèŠæ±ããããã£ãŒã«ãã®ã©ãã NaN ã§ã¯ãããŸããã
ID ã¯ãã¡ã€ã« Cruises.lis ã«ãªã¹ããããŠããŸãã
gmt mgd77list `cat Cruises.lis` -E -Ia -F"dist,faa,grav12_2,depth<3000" > \
æµ ã_éå.d
ã¯ã«ãŒãº ID ã
ãã¡ã€ã« Cruises.lis ã«ãªã¹ããããŠããŸãããfaa ã®ããããã©ã°ã瀺ãã¬ã³ãŒãã®ã¿ãååŸããŸã
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å ã®ç°åžžã¯ NaN ã§ã¯ãããŸããã§ããã ç°åžžåãå€ãããããã®å¶éãå®è£ ãããŠããŸãã
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IGRF ã®èšç®ã¯ãè±åœã® Susan Macmillan ã«ãã£ãŠæžããã Fortran ããã°ã©ã ã«åºã¥ããŠããŸãã
Geological SurveyãJoaquim LuisãU Algarve ã«ãã£ãŠ f2c ãä»ã㊠C ã«ç¿»èš³ããã
Paul Wesselã«ããGMTã¹ã¿ã€ã«ã
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(1) g = 978052.0 * [1 + 0.005285 * sin^2(緯床) - 7e-6 * sin^2(2*緯床) + 27e-6 * cos^2(緯床) *
cos^2(lon-18)]
(2) g = 978049.0 * [1 + 0.0052884 * sin^2(緯床) - 0.0000059 * sin^2(2*緯床)]
(3) g = 978031.846 * [1 + 0.0053024 * sin^2(緯床) - 0.0000058 * sin^2(2*緯床)]
(4) g = 978032.67714 * [(1 + 0.00193185138639 * sin^2(緯床)) / sqrt (1 - 0.00669437999013 *
sin^2(緯床))]
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