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Re: Sfericheskaya astronomiya
2.12.2006 11:09 | A. e. Rus
K sozhaleniyu, ya tak i ne ponyal prakticheskoi rekomendacii, kak, znaya astronomicheskie koordinaty observatorii, a takzhe GPS polozhenie, ya mogu s maksimal'noi tochnost'yu opredelit' (1)- rasstoyanie do centra Zemli, i chto dlya menya bolee vazhno - (2) proekciyu radius-vektora (ot centra Zemli do observatorii) na ploskost' Zemnogo ekvatora. Naprimer, esli
1)
an astronomical measurement (theodolite timing ) which refers to the Geoid
W 03 23 56.285 (error 0.058)
N 37 04 06.168 (0.440)
altitude 2851.5 m
2) a GPS position fererring to their ellipsoid WGS84
W 03 23 34.16091 (0.006)
N 37 03 57.97407 (0.007)
altitude 2903.995 m
to chemu ravny (1) i (2)?
Zaranee spasibo za pomosh'.
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- Sfericheskaya astronomiya (V. E. Zharov/GAISh, Moskva, 7.06.2003 20:42, Bait, otvetov: 13)
- Re: Sfericheskaya astronomiya
( Gost',
9.12.2005 18:41, 999 Bait, otvetov: 2)
Orty sfericheskoi sistemy koordinat vyrazhayutsya cherez orty dekartovoi sleduyushim obrazom:
ir = (cos(lambda)*ix+ sin(lambda)*iy)sin(theta) + cos(theta)*iz,
ilambda = -sin(lambda)*ix+ cos(lambda)*iy,
itheta = (cos(lambda)*ix+ sin(lambda)*iy)cos(theta)- sin(theta)*iz,
otkuda, pri theta=90o i lambda=0o sleduet, chto
ir = ix,
ilambda = iy,
itheta = -iz.
Eto oznachaet, chto troiki ortonormirovannogo bazisa dekartovoi i sfericheskoi sistem koordinat - protivopolozhno orientirovany (znak "-" pered ortom iz). Esliu dekartovoi sistemypravaya orientaciya bazisnoi troiki, to u sistemy sfericheskoi v dannom sluchae ona - LEVAYa.
Avtoram stat'i neobhodimo razobrat'sya s putanicei, vytekayushei iz togo, chto oni pishut.
- Re[2]: Sfericheskaya astronomiya (G. B. Vishnyackii, 3.03.2012 16:40, 27 Bait) Cho ... ? Nu i chto? Bednyaga!
- Re[2]: Sfericheskaya astronomiya
(G. B. Vishnyackii,
3.03.2012 16:44, 1.2 KBait)
< tbody>
Citata: Orty sfericheskoi sistemy koordinat vyrazhayutsya cherez orty dekart ovoi sleduyushim obrazom:
ir = (cos(la mbda)*ix+ sin(lambda)*iy)sin(theta) + cos(the ta)*iz,
ilambda = -sin(lamb da)*ix+ cos(lambda)*iy,
itheta = (co s(lambda)*ix+ sin(lambda)*iy)cos(theta)- s in(theta)*iz,
otkuda, pri theta=90o i l ambda=0o sleduet, chto
ir = < strong>ix,
ilambda = < strong>iy,
itheta = -iz.
Eto oznachaet, chto troiki ortonormirovannogo bazisa dek artovoi i sfe richeskoi sistem koordinat - protivopolozhno orientirovany (znak "-" pered ortom iz). Esliu dekartovoi sistemypravaya orientaciya bazisno i troiki, to u sistemy sfericheskoi v dannom sluchae ona - LEVAYa.
Avtoram stat'i neobhod imo razobrat'sya s putanicei, vytekayushei iz togo, chto oni pishut.
Nu i chto? Bednya ga....
- Re: Sfericheskaya astronomiya
( Gost',
1.03.2006 3:00, 376 Bait, otvetov: 2)
Ochen' ponravilos' to, chto takoi sait vse-taki est'. No ya nikak ne mogu naiti analogii Nepera, v chastnosti, "Koleso (okruzhnost', krug) Nepera". Izvinyayus' za netochnost' termina, perevodil s angliiskogo.
Eto ispol'zuetsya pri vychislenii verteksa (perpendikulyar iz polyusa) k DBK (Duga Bol'shogo Kruga). Gde eto mozhno naiti?
S uvazheniem,
Evgenii.
- Re[2]: Sfericheskaya astronomiya
(E. V. Kazakov,
3.03.2006 12:19, 22 Bait, otvetov: 1)
Eto prosto mnem
- Re[3]: Sfericheskaya astronomiya (E. V. Kazakov, 3.03.2006 12:20, 237 Bait) Eto prosto mnemonicheskoe pravilo dlya zapominaniya formul sfericheskoi trigonometrii. Sm., naprimer, zdes': http://www.cultinfo.ru/fulltext/1/001/008/107/980.htm i li h t tp://www.krugosvet.ru/articles/119/1011993/print.htm
- >> Re: Sfericheskaya astronomiya
(A. e. Rus,
2.12.2006 11:09, 736 Bait)
K sozhaleniyu, ya tak i ne ponyal prakticheskoi rekomendacii, kak, znaya astronomicheskie koordinaty observatorii, a takzhe GPS polozhenie, ya mogu s maksimal'noi tochnost'yu opredelit' (1)- rasstoyanie do centra Zemli, i chto dlya menya bolee vazhno - (2) proekciyu radius-vektora (ot centra Zemli do observatorii) na ploskost' Zemnogo ekvatora. Naprimer, esli
1) an astronomical measurement (theodolite timing ) which refers to the Geoid
W 03 23 56.285 (error 0.058)
N 37 04 06.168 (0.440)
altitude 2851.5 m
2) a GPS position fererring to their ellipsoid WGS84
W 03 23 34.16091 (0.006)
N 37 03 57.97407 (0.007)
altitude 2903.995 mto chemu ravny (1) i (2)?
Zaranee spasibo za pomosh'.
- Re: Sfericheskaya astronomiya
(G. B. Vishnyackii,
29.02.2012 16:26, 133 Bait)
Priyatno, chto uroven' dostatochno prilichnyi po sravneniyu s bol'shinstvom chepuhi, kotoraya napisana na etu temu v internete.
- Re: Sfericheskaya astronomiya
(G. B. Vishnyackii,
5.03.2012 14:53, 976 Bait)
Zamechanie po knige Zharova.Napisano:2.3. Sfericheskaya sistema koordinatDlya resheniya mnogih zadach okazyvaetsya udobnee vmesto dekartovoi sistemy ispol'zovat' krivolineinye sistemy koordinat. V obshem sluchae ispol'zuyutsya tri funkcii , , dlya opredeleniya polozheniya tela v prostranstve. Koordinatnaya setka sostoit iz peresekayushihsya krivyh fi (x, y, z) = const ...Vmesto"peresekayushihsya krivyh" sleduet napisat' "peresekayushihsya koordinatnyh ploskostei".
- Re: Sfericheskaya astronomiya
(G. B. Vishnyackii,
5.03.2012 14:55, 1.0 KBait)
Zamechanie po knige Zharova.Napisano:2.3. Sfericheskaya sistema koordinatDlya resheniya mnogih zadach okazyvaetsya udobnee vmesto dekartovoi sistemy ispol'zovat' krivolineinye sistemy koordinat. V obshem sluchae ispol'zuyutsya tri funkcii , , dlya opredeleniya polozheniya tela v prostranstve. Koordinatnaya setka sostoit iz peresekayushihsya krivyh fi (x, y, z) = const ...Vmesto"peresekayushihsya krivyh" sleduet napisat' "peresekayushihsya koordinatnyh poverhnostei".
- Re: Sfericheskaya astronomiya (Alisa Alisa, 25.08.2014 19:42, 83 Bait) Processiya kak vid dvizheniya zvezd. http://kosmolyabiya.ru/fizika-v-kosmose/dvizhenie
- Re: Sfericheskaya astronomiya (V. V. K, 11.04.2015 14:44, 159 Bait) Ploho ponimayu formuly, no prostoi vopros: mozhet li gravitacionnoe pole (chernoi dyry naprimer) "iskrivit'" traektoriyu fotona na 180 (vernut' svet obratno)
- Re: Sfericheskaya astronomiya (Kon'shin Dmitrii, 26.06.2019 14:40, 216 Bait) 4.2. Uravnenie geoida Konechnoe uravnenie 4.20 pri podstanovke znachenii ekvatora i polyusa vydaet odno i to zhe znachenie uskoreniya, ravnoe 9,7803278 ekvatorial'nomu. Razve znachenie uskoreniya na polyuse grubo ne 9,83