Re: Optical Instruments

From: Björn Gimle (b_gimle@algonet.se)
Date: Mon Sep 02 2002 - 08:58:31 EDT

  • Next message: Jean-Paul Cornec: "Obs 02 sep"

    I think it can do 4.5 d/s in BOTH RA and Dec simultaneously, so it could "track"
    (leap-frog) at a range of 100 km.
    For orbits close to 100 km height, there would be a black-out period on
    high-elevation transits, when az-rate exceeds 4.5, and the telescope must swing
    around to acquire the satellite descending, up to 40 s later on a zenithal pass?
    
    What worries me more is the report in May 2000 S&T that the scope doesn't stop
    at the correct RA/dec !
    
    > ...Also, has anyone done this with the Meade ETX telescope series???
    
    > If you look closely at the specs, I think you will find ETX telescopes cant
    slew
    > fast enough to track close passes of the ISS and other objects in
    > similar or lower orbits. I dont know whether you can use such telescopes
    > purely manually.
    
    
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