Tomas precitaj si clanok
http://www.dfmengineering.com/news_eng_ ... coordinate
v casti: Telescope Corrections / 2. Mechanical and optical non-perpendicularities.
Citujem
The mechanical non-perpendicularity between the declination axis and the polar axis is set by the machining and assembly tolerances of the various parts. Sometimes the flexure of the structure is the controlling factor. With some telescopes it is possible to measure the mechanical non-perpendicularity and shim or adjust the declination bearings to reduce the amplitude of this term.
The optical non-perpendicularity (sometimes called optical collimation error) is an error not really appreciated by many astronomers. This is an error where the optical axis of the primary mirror is not perpendicular to the declination rotational axis. It introduces large R.A. pointing errors. Sometimes the primary mirror tilt is changed when adjusting the collimation of the optics. This will change the correction coefficient and introduce large pointing errors. The primary mirror needs to carefully setup mechanically in its cell and then not adjusted in tilt (centering adjustments are OK) when the optics are collimated. If pointing measurements show that the collimation error is larger than desired, then the primary mirror needs to be adjusted to minimize the non-perpendicularity correction term.
kolec
P.S.
Martin z povahy chyby pri nastaveni montaze - nejaky cas napr. rastie zmena v + DEC, neskor nejaky cas -zmena v DEC, tak z toho vyplyva ze chyba v RA i ked je mala tak sa nacita. Cagas tvrdi , ze pointacna program zachyti uz stotinove zmeny pixelu v jeho polohe
(I kdyby byla DE osa vůči RA ose nekolmá o těch řekněme 10 armin, tak odchylka 1 pixel v DE vyvolá pod tímto úhlem odchylku 0.0029 pix. v RA. To je neměřitelné a pointaci to neovlivní.)
Skoda mal som viac clankov , ale teraz narychlo ich neviem najst.
Ked so robil pokusy tak po korekcii chyby v nekolmosti mi poitacia sa znacne ukludnila
Primarne som chcel vyvolat diskusiu , lebo iba v nej sa da dobrat niekde (mozno sa nevyjadrujem uplne presne to uznavam , ale ako som pisal
dokazem nastavit montaz velmi presne , ale pri optickej nekolmosti mi pointacia dost vyrazne skakala. Prvotny zaver bol, ze som zle nastavil montaz. Neskor som narazil na zopar clankov.
Tak sa vam ospravedlnujem , ze som sa opovazil narusit vase kruhy s mojim blbym nazorom
