> Begin forwarded message:
> You could have a consortium of educational telescopes where software is 
> common and anyone could add to that common code. 
> There would be a standard way of moving each telescope and reading from it 
> (digitize); and each site would write glue code between their specific 
> hardware and the common batch of code.
> You could create a web browser user interface so that anyone in the world 
> with a web browser could access any of the telescopes. This would be password 
> protected so that each site controlled who accessed their gear. Each site’s 
> access policy would be TBD (to be determined).
> You could also have a standard computer setup at each site where the computer 
> hardware is the same (e.g. windows or linux computer, graphics card for 
> FFT’s, off the shelf pci express digitizer). Below is an example off the 
> shelf high speed digitizer. 
> http://www.gage-applied.com/digitizers/12-bit/pcie/digitizer-compuscope-eon-express.htm
> <http://www.gage-applied.com/digitizers/12-bit/pcie/digitizer-compuscope-eon-express.htm>
> It would probably be better to use as much off-the shelf commercially 
> available gear as possible, since custom takes much time to build and 
> maintain. And if maintenance consumes too much time, a site can fall behind 
> -- and the end result is idle telescope.
> Nrao might be willing to dedicate a post-doc. They also might be willing to 
> create glue between education telescopes (ET’s) and their own large batch of 
> vla/gbt code for several reasons: 
> n  Help astronomers do test experiments with small educational telescopes 
> before taking up time on nrao telescopes
> n  Help train astronomers on their own code
> Nasa might be willing to dedicate a post-doc, since it would help education 
> in the usa.
> Perhaps a phd thesis could synchronize multiple ET’s and build an array? GPS 
> time could help, yet one might need some additional timing resolution to do a 
> decent job. I am not sure how one would build a PMA (poor man array).
> One of the first steps would probably be to do a survey of all the publically 
> available software used for radio astronomy; and think about how one might 
> glue together pieces to build a common batch of RAEC code.
> Also, one could do a survey of hardware used for radio astronomy and think 
> about what would be common at each site.
> One could also do a survey of commercially available receiver gear that has 
> not been used in the past, yet might be helpful. Below is an example.  
> http://sine.ni.com/nips/cds/view/p/lang/en/nid/212999 
> <http://sine.ni.com/nips/cds/view/p/lang/en/nid/212999>
> http://www.ni.com/datasheet/pdf/en/ds-538 
> <http://www.ni.com/datasheet/pdf/en/ds-538>
> Perhaps one could write a grant for a common batch of hardware (e.g. 
> computer, GPU, digitizer, receiver) for multiple sites (e.g. 5 sites * $15k 
> each = $75k), to get things started. Perhaps a wealthy person would write a 
> check for $75k without spending much time thinking about it? 
> You could contact sites with idle telescopes and ask them if they would 
> participate if someone sent them free common hardware. You might be able to 
> get more people interested if you provided free gear.
> Another way to get more interested is if you have two computers at each site, 
> one common to each site, and one specific to each site. much complexity gets 
> offloaded to the common and the site does not need to touch it, other than 
> assemble and attach to internet.
> The common consortium computers (CCC) are totally identical at each site, 
> they are maintained remotely by one master remote operator (MRO) who loads 
> software and makes sure the versions are working well together. The CCC 
> computer would be connected to common receiver/digitizer hardware, it would 
> contain lots of software (some from nrao?), and users would interact with 
> this computer via a web browser.
> The second computer is specific to each site (i.e. site specific computer, 
> SCS). This would be maintained by each site and focus on things that are 
> unique to the site, such as moving the telescope. The CCC and SCS would talk 
> in a standard manner via Ethernet. 
> If you make it easy for a site to participate, you would get more people to 
> jump in. Remote management of CCC with common digitizer/receiver and lots of 
> software would make it easy.
> Initial goals might be:
>      - spectrum
>      - build image
>      - remote connection
> You could call this “Radio Astronomy Education Consortium” (RAEC) and give it 
> a website. 
> This is an example of a website created with wix.com <http://wix.com/> 
> software and is easy to maintain. Word press is good too.
> http://www.caltechmicrowave.org/ <http://www.caltechmicrowave.org/>
> Perhaps there are some retired radio astronomy people that would like to 
> donate their time, free of charge, where they work from home, and don’t need 
> to get out of their chair? They could help with surveys of existing software 
> and hardware, and help build the CCC.
> Perhaps retired nrao programmers would help adapt nrao code to the CCC ? If 
> you shipped them commercial 2meter steerable antennas and the $15k standard 
> hardware kit and tell them “don’t touch it”, they might not be able to 
> control themselves, and they might build this up without any encouragement or 
> direction.
> Food for thought ..
> Glenn Weinreb
>   <>
> From: Sander Weinreb [mailto:swein...@caltech.edu 
> <mailto:swein...@caltech.edu>] 
> Sent: Tuesday, August 18, 2015 1:23 AM
> To: 'Alan Rogers' <a...@haystack.mit.edu <mailto:a...@haystack.mit.edu>>
> Cc: 'carl heiles' <hei...@vermi.berkeley.edu 
> <mailto:hei...@vermi.berkeley.edu>>; 'Alan Rogers' <arog...@haystack.mit.edu 
> <mailto:arog...@haystack.mit.edu>>; 'Dave Deboer' <ddeb...@berkeley.edu 
> <mailto:ddeb...@berkeley.edu>>; 'Han' <st...@kasi.re.kr 
> <mailto:st...@kasi.re.kr>>; 'Steve Smith' <ste...@caltech.edu 
> <mailto:ste...@caltech.edu>>; 'Monroe, Ryan M (382F)' 
> <ryan.m.mon...@jpl.nasa.gov <mailto:ryan.m.mon...@jpl.nasa.gov>>; Gregg 
> Hallinan <g...@astro.caltech.edu <mailto:g...@astro.caltech.edu>>; Andrew 
> Janzen <ajan...@caltech.edu <mailto:ajan...@caltech.edu>>; Ahmed Akgiray 
> <ahmed.akgi...@ozyegin.edu.tr <mailto:ahmed.akgi...@ozyegin.edu.tr>>; 
> asoli...@caltech.edu <mailto:asoli...@caltech.edu>; Hamdi Mani 
> <hamdi.m...@gmail.com <mailto:hamdi.m...@gmail.com>>; Joe Bardin 
> <jcbar...@gmail.com <mailto:jcbar...@gmail.com>>; glenn.caltech 
> <glenn.calt...@gmail.com <mailto:glenn.calt...@gmail.com>>; GLENN WEINREB 
> <gwein...@gwinst.com <mailto:gwein...@gwinst.com>>; Anthony Readhead 
> <a...@astro.caltech.edu <mailto:a...@astro.caltech.edu>>; 'Shri Kulkarni' 
> <s...@astro.caltech.edu <mailto:s...@astro.caltech.edu>>
> Subject: RE: Educational 6m Radio Telescope at Caltech
> Alan,
> WOW!  Your letter  is a gold-mine  of links to extremely capable, low cost, 
> equipment and software  to interest and  educate a new generation.  I knew 
> you had been working on educational projects but did not realize the extent 
> and capabilities. Great job!
> I was particularly impressed by:
> 1)      The beautiful 2007 Report on galactic rotation  by the Harvard  
> students
> 2)      The low cost interferometry experiments 
> 3)      Interesting solar measurements – limb brightening and time variation
> 4)      The Michigan summer physics “immersion” program.
> 5)      The “dongle” software-radio  receiver and associated high resolution 
> spectrometer
> 6)      The software user  interface.
> I will be thinking about how to implement some of this at  Caltech.  One 
> quick question: What language is used for  the software for new  SRT 
> telescope?  Is it easy for me to run a simulation (or do I need to visit 
> Haystack) ?
> Congratulations on doing such a wonderful job over  many years!
> Sandy
> -----Original Message-----
> From: Alan Rogers [mailto:a...@haystack.mit.edu 
> <mailto:a...@haystack.mit.edu>] 
> Sent: Monday, August 17, 2015 6:43 AM
> To: Sander Weinreb <swein...@caltech.edu <mailto:swein...@caltech.edu>>
> Cc: carl heiles <hei...@vermi.berkeley.edu 
> <mailto:hei...@vermi.berkeley.edu>>; Alan Rogers <arog...@haystack.mit.edu 
> <mailto:arog...@haystack.mit.edu>>; Dave Deboer <ddeb...@berkeley.edu 
> <mailto:ddeb...@berkeley.edu>>; 'Han' <st...@kasi.re.kr 
> <mailto:st...@kasi.re.kr>>; Steve Smith <ste...@caltech.edu 
> <mailto:ste...@caltech.edu>>; Monroe, Ryan M (382F) 
> <ryan.m.mon...@jpl.nasa.gov <mailto:ryan.m.mon...@jpl.nasa.gov>>
> Subject: Re: Educational 6m Radio Telescope at Caltech
> Dear Sandy,
>       I can really only comment on the Small Radio Telescope (SRT) which uses 
> a 2.3 m antenna and 1420 MHz receiver. With this antenna the key experiment 
> is the measurement of Galactic rotation curve
> http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Memos/011.pdf 
> <http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Memos/011.pdf>
> Here is report which includes Galactic rotation curve measured by Jim Moran's 
> students in 2007
> http://www.haystack.mit.edu/edu/undergrad/pdf/haystack_FINAL_2_8.pdf 
> <http://www.haystack.mit.edu/edu/undergrad/pdf/haystack_FINAL_2_8.pdf>
> I recently attended an ALphA immersion workshop by Prof. Carl Akerlof 
> <aker...@outlook.physics.lsa.umich.edu 
> <mailto:aker...@outlook.physics.lsa.umich.edu>> in which this experiment was 
> done by several University faculty members interested in a Radio Astronomy
> http://www.advlab.org/imm2015_michigan_radioastronomy.html 
> <http://www.advlab.org/imm2015_michigan_radioastronomy.html>
> The 2.3 m antenna has also been used to create a map the 21 cm hydrogen for 
> the entire visible sky. Other projects include measuring the solar flux
>    Hiep, N. V., et al. "Radio Observation of Solar-Activity-Related mHz 
> Oscillations." Solar Physics 289.3 (2014): 939-950
> There has been some SRT interferometry
> Here are some links:
> Modeling the Solar Limb Brightening at 21 cm Using Amplitude and Closure 
> Phase Measurements from a 3-Element Interferometer
> http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Memos/023.pdf 
> <http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Memos/023.pdf>
> Cygnus
> www.haystack.mit.edu/edu/reu/2005/files/evarts.pdf 
> <http://www.haystack.mit.edu/edu/reu/2005/files/evarts.pdf>
> Oberoi, D., E. R. Evarts, and A. E. E. Rogers. "High Temporal and Spectral 
> Resolution Interferometric Observations of Unusual Solar Radio Bursts." 
> Solar Physics 260.2 (2009): 389-400.
> With a 6m antenna you should be able to observe the 21 cm line in Andromeda 
> and OH should observable. Also some of the strongest pulsars should be 
> observable
> http://www.haystack.mit.edu/edu/undergrad/materials/SSemission.pdf 
> <http://www.haystack.mit.edu/edu/undergrad/materials/SSemission.pdf>
> As far a user interface the SRT has a display of the sky vs azimuth and 
> elevation. The objects displayed are those listed in a user catalog (which 
> includes the Sun, Galactic plane etc.). The antenna position is also 
> displayed. Clicking on a source moves the antenna to the source. Various 
> on/off and scan modes are provided. The antenna and radiometer can also be 
> run from a command file.
> Here is a very old manual
> http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Software/SRTManual.pdf 
> <http://www.haystack.mit.edu/edu/undergrad/srt/SRT%20Software/SRTManual.pdf>
> Recently a similar interface was written by a REU student to point the 37m 
> Haystack antenna for future radio astronomy observations. I don't necessarily 
> recommend the SRT software because I don't write good well structured code 
> but it can be downloaded and run in simulate mode to get a better idea of 
> what it does. The "New" SRT uses a TV dongle for a receiver and an Alfa radio 
> antenna controller.
> http://www.haystack.mit.edu/edu/undergrad/srt/index.html 
> <http://www.haystack.mit.edu/edu/undergrad/srt/index.html>
>                  best regards Alan
> On Sun, 16 Aug 2015, Sander Weinreb wrote:
> > 
> > Carl and Alan,
> > 
> >  
> > 
> > I need some advice from old salts about how to demonstrate radio astronomy 
> > observing techniques to new graduate students.
> > 
> >  
> > 
> > We are paying some attention to the  6m  telescope on the roof of the 
> > EE building at  Caltech  and are trying to make it into  a good 
> > teaching instrument.  The front-end covers 1.3 to 1.7 GHz with about 100K 
> > Tsys on two linear  polarizations and we recently installed a Roach 1 
> > spectrometer with two 500 MHz bandwidth channels  and 60 kHz resolution. 
> > There is much RFI and a lesson we want to teach is how to work around it.
> > 
> >  
> > 
> > Our weakest link is the software to integrate telescope pointing with 
> > receiver output.  We are working on developing a convenient system   but I 
> > wonder if it already exists on other  small telescopes.  Do you have any 
> > suggestions for integrated telescope and  data taking  control system we 
> > should look  at?
> > 
> >  
> > 
> > A second  topic  is  what to observe with the  telescope as 
> > educational demonstrations.    We can certainly map galactic hydrogen and  
> > look at  the stronger continuum sources.  The spectrometer can cross 
> > correlate the two linear polarizations and we could get into polarization 
> > measurements. Do you have suggestion  for observations?
> > 
> >  
> > 
> > I would like to observe OH  (again, since I have not observed it or 
> > followed what has  been done since 1963 !).   Where is a good summary of 
> > the observations?   I think  our 60 KHz resolution is too  broad and we 
> > will need to improve it by a factor of 10 or more.
> > 
> >  
> > 
> > Sandy
> > 
> > 
> >

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