
bhoomi kendreekritha, bhoomi-nischitha coordinate sisttam

bhoomi kendreekritha, bhoomi-nischitha coordinate sisttam (ecronym ecf), geosentric coordinate sisttam ennum ariyappedunnu, ithu bhoomiyude sameepathulla sthaanangale (athinte uparithalam, ulvasham, anthareeksham, chuttumulla bahirakasham ennivayulppede) athinte pinda kendratthil ninnulla "x", "y", "z" alavukal aayi prathinidheekarikkunna oru cartician speshyal reference sistamaanu. upagrahangalude bhramanapathangal tracucheyyunnathilum bhoomiyude uparithalathile sthaanangal alakkunnathinulla upagraha naavigeshan samvidaanangalilum ithinte ettavum saadhaaranamaaya upayogam undengilum krasttal chalanam tracucheyyunnathu polulla prayogangalilum ithu upayogikkunnu.
oru nischitha thaalpparyamulla sthalathuninnum bhoomiyude kendrathilekkulla doorathe geosentric dooram ennu vilikkunnu, ithu reference deerghavrithaakrithiyilulla uparithalathile pooyintukalil parimithappedutthaathe "geosentric radius" ennathinte saamaanyavalkkaranamaanu.
melpparanja rund alavukal thammilulla vyathyaasamaayi nirvachikkapettirikkunna oru tharam uyaramaan geosentric uyaram ithu "geodetic uyaram" ennu thettidharikkaruthu.
bhoomishaasthraparamaaya ekadesha parivartthanatthil isif geodetic kordinettukalum (akshaamshavum rekhaamshavum) thammilulla parivartthanangal charcha cheyyappedunnu.
ghadana.
eathoru speshyal reference systetheyum pole, ecefil oru amoortha coordinate sisttavum (eee saahacharyathil, oru parambaraagatha trimana valamkaiyyan sisttam), bhoomiyile yadhaartha sthaanangalumaayi coordinate systethe bandhippikkunna oru geodetic daattavum adangiyirikkunnu. aagola positioning systethinu (gps) upayogikkunna ecf geosentric dablyujies 84 aanu, athil nilavil athintethaaya deerghavrithaakrithiyilulla nirvachanam ulppedunnu. naad 83 polulla mattu praadeshika daattangalum upayogikkaam. dattangal thammilulla vyathyaasangal kaaranam, oru sthalathinte ecf kordinettukal vyathyastha daattangalkk vyathyasthamayirikkum, ennirunnaalum mikka aadhunika daattangalum thammilulla vyathyaasangal thaarathamyena cheruthaanu, eathaanum meterukalkkullil.
ecef coordinate systethinu inipparayunna paaraamettarukal undu
kaaliforniyayile donner sammittinu sameepamulla oru brass diskinte ngs daattayaan oru udaaharanam. deerghavrithathinte alavukal kanakkiledukkumbol, laatt/loonn/uyaram-deerghavrithaakrithiyilulla kordinettukalil ninnu x-y-z lekkulla parivartthanam nereyaanu-deerghavrithaakrithiyilulla uparithalathil nalkiyirikkunna laatt-loninu x-y-z kanakkaakkuka, koodaathe deerghavrithathinu lambavum deerghavrithathinu mukalilulla pooyintinte uyarathinu thulyamaaya neelavumulla x-y-z vekttar cherkkuka. vipareeta parivartthanam kooduthal budhimuttaanu x-y-z nalkiyaal namukk udan thanne rekhamsham labikkum, pakshe akshaamshathinum uyarathinum adanja soothravaakyam nilavililla. geodetic sisttam kaanuka."1976-leeii" "sarway avalokanam" "enna boringinte soothravaakyam upayogichu aadyathe aavarthanam deerghavrithathinu 10,000 meter mukaliloo 5,000 meter thaazheyo ullidatholam kaalam 10 digrikkullil akshaamsham nalkunnu".
jyothishaasthrathil.
sourayoodhathile jyotishaasthra vasthukkale cartician x, y, z akshangalil moonnu alavukalil kandethaan geosentric kordinettukal upayogikkaam. avaa toposentric kordinettukalil ninnu vyathyasthamaan, avaa nireekshakante sthaanam uyarathilum asimuthilum bairingukalkkulla reference pooyintaayi upayogikkunnu.
aduthulla nakshathrangalkk, jyothishaasthranjar sooryante kendramaayi suryakendra kordinettukal upayogikkunnu. reference thalam bhoomiyude aakasha bhoomadhyarekhayumaayo grahanarekhayumaayo ksheerapathatthinte gaalaktik bhoomadhyarekhayumaayo vinyasikkaam. eee 3dii khagola coordinate samvidaanangal golaakrithiyilulla jyothishaasthrathil upayogikkunna bhoomadhyarekha, grahana, tarapatha coordinate samvidaanangalilekku z akshamaayi yadhaartha dooram cherkkunnu.