Arecibo Observatory to be Demolished

Discussion in 'Amateur Radio News' started by KA0HCP, Nov 19, 2020.

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  1. G3SEA

    G3SEA Ham Member QRZ Page

    Or Jeff Bezos :cool:
    A slice from Amazon Black Friday Sales should be sufficient :cool:
    G3SEA/KH6
     
    PU2OZT and WB9YTG like this.
  2. KF4VAR

    KF4VAR Ham Member QRZ Page

    If they can get the feed point platform down without a catastrophic failure why not put a much lighter Cassegrian reflector in its place on new cables.... and put the electronics down at dish level. one problem with doing it this way may be additional attenuation but the Cassegrian reflector would weigh less than what is up there on cable. Also I dont know how steerable the telescope is i.e. how much they can move various instruments at the feed point to change the objective.....being able to somewhat steer the aimpoint by slewing an instrument to illuminate one part of the reflector more than others might obviate a Cassegrian solution. As an earlier poster suggested a Gregorian solution might work.

    If anyone here is so interested this is a site with a lot of radio astronomy fundamentals

    https://www.atnf.csiro.au/research/radio-school/2011/talks/Parkes-school-Fundamental-II.pdf
     
    Last edited: Nov 22, 2020
  3. KO4IRR

    KO4IRR Ham Member QRZ Page

    I was born and raised in PR and never had the chance to visit the place!
     
  4. N2IPH

    N2IPH Premium Subscriber QRZ Page

    "AO was never able to 'see' the whole sky, nor was it designed for that."

    Yes, that was my comment about needing both FAST and Arecibo and
    yes I understand searching for NEOs is not its primary mission.

    Sorry for the typo, sticky fingers I guess when I posted that.
     
  5. WA8ZYT

    WA8ZYT Ham Member QRZ Page

    Funny how there was enough money to build it in the first place, but not enough money to maintain and fix it. Of course, that is the way it goes with a lot of the US's infrastructure.
     
  6. W1YW

    W1YW Ham Member QRZ Page

    Cassegrains are for point feeds...spherical dishes have line feeds. Gregorians convert line foci to point focus.

    The dish is spheroid so it can track and not be a transit instrument. Can't do that with a Cassegrain on a spheroid.
     
  7. PU2OZT

    PU2OZT Ham Member QRZ Page

    Cassegrain! won't blame you not being fluent in French, but misspelling a so well known scientist name is impardonnable, Wouff Hong applies for less.
     
  8. KF4VAR

    KF4VAR Ham Member QRZ Page

    yep a typo and not reading before pressing post reply. Thanks very much for catching this. Misspelled it a number of times as well. "NO EXCUSES!!!! OFF WITH HIS HEAD"
     
    W1YW likes this.
  9. K2WH

    K2WH Premium Subscriber QRZ Page

    Probably a cheaper replacement and possibly much larger would be in space, station keeping, geo locked, somewhere between earth and the moon.

    No corrosion and serviceable.
     
  10. KC1OCA

    KC1OCA Ham Member QRZ Page

    This is a shame. Seti@home has taken a lot of data packets from Arecibo and worked them on home computers. I got in in Seti@home classic a few months after they got started. :-(
     
    N2IPH likes this.

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