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Re[3]: Metodika obrabotki dannyh astronomicheskih nablyudenii 2
25.12.2008 12:06 | S. Yu. Yudin

Citata:
pryamoe voshozhdenie i sklonenie dany topocentricheskie bez vsyakih redukcii.

Zdravstvuite Vadim, bol'shoe spasibo. Vse Vashi soobsheniya yavlyayutsya dlya menya ochen' cennymi i topocentricheskoe predstavlenie dannyh mnogoe stanovit na svoi mesta, no s moimi fragmentarnymi poznaniyami v astronomii i v chastnosti po ustroistvu astronomicheskih instrumentov mne, vse taki, ne vse ponyatno i ya schitayu, chto v razdele Original Data dolzhny byli byt' dany dannye v gorizontal'noi sisteme koordinat. Hotya ya ne ponimayu, kak i v gorizontal'noi sisteme koordinat mogli byt' polucheny original'nye dannye meridiannyh nablyudenii v doteleskopicheskuyu eru. Ved' (kak ya ponimayu) meridiannye nablyudeniya proizvodyatsya v tot moment, kogda svetilo raspolozheno v meridiannom kruge, a Merkurii i Venera mogut tuda popast' tol'ko togda, kogda nedaleko ot nih nahoditsya Solnce i bez teleskopa ih nikak ne budet vidno. Daite pozhaluista poyasneniya a to mne nado budet obrabatyvat' eshe i dannye Ptolemeya, a menya glozhut vsyakie somneniya po povodu metodiki obrabotki ego dannyh. Ya, naprimer, podozrevayu, chto on nablyudal eti svetila v moment voshoda i zakata, a potom privodil eti koordinaty s uchetom popravki na vremya nablyudeniya k koordinatam, kotorye budut pri prohozhdenie etimi svetilami meridiana, a v takom sluchae refrakciya budet drugaya.

I eshe, Vadim poyasnite mne pozhaluista v formate dannyh Parizhskogo byuro dolgot smysl Coordinate Type. V dannyh, kotorye privodit Parizhskogo byuro dolgot pishetsya tol'ko App (smotrite prodolzhenie stroki dannyh, kotorye ya privodil v pervom soobshenie dlya Merkuriya ot 29 sentyabrya 1924 goda)

5 53 34.4000 1.0000 PARI various transits 0.0 Trans App

Eti dannye rasshifrovyvayutsya tak

dec. and sigma A1, I2, 1X, I1, 1X, F7.4, 1X, F7.4, Deg Min ArcSec Sec 3X,
Observatory A4, 1X,
Instrument A11, 1X,
Focal Length F5.1, in cm. 2X,
Observation Type A5, (Trans)it, (Micro)meter, (Photo) graphic, or CCD 2X,
Coordinate Type A5, (App)arent J2000, B1950, or other epoch

Zdes' mne ne ponyatno App oznachaet, chto eto vidimye koordinaty dlya epohi i ravnodenstviya J2000 ili prosto vidimye koordinaty i dlya epohi B1950 dolzhno byt' napisano App B1950 ili prosto B1950. Sudya po formatu dannyh Pulkovskoi observatorii, poluchaetsya, chto prosto B1950, t.k. u nih napisano 1950.0, no hotelos' by eto utochnit'. Kstati, dal'she oni ukazyvayut v kakih koordinatah privedeny dannye t topocentricheskie i g - geocentricheskie i u nih byvaet dazhe, chto dlya odnoi planety oni idut vperemeshku i ne ponyatno, zachem oni odni dannye, poluchennye v topocentricheskoi sisteme, perevodyat v geocentricheskie, a drugie ne perevodyat. Vot primer Pulkovskih dannyh

1972 2 1.677390 23 21 57.770 -5.25061111 1950.0 t


A eshe v reducirovannyh dannyh Parizhskogo byuro dolgot posle Coordinate Type idut i drugie parametry, rasshifrovki kotoryh v formate dannyh net.

+20 17 22.0500 0.5500 84 Trans App True Geo FK4

Kak ya ponimayu, Geo oznachaet, chto eto geocentricheskie koordinaty, a FK4 eto nazvanie kataloga, no ya ne ponimayu, prichem zdes' katalog i chto znachit True, esli eti koordinaty dany dlya standartnoi epohi J2000.

S nailuchshimi pozhelaniyami Sergei Yudin.




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