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The Dream of not just an Amateur Interferometer A.L.L.B.I.N.+ +

The Dream of not just an Amateur Interferometer A.L.L.B.I.N.+ +. Peter Wright E.R.A.C. ALLBIN is the Excuse to Solve allot of Problems we all have! It,s a Common problem Solving Machine we all need in part or in full to go on further and make Radio Astronomy more fun for Everyone !.

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The Dream of not just an Amateur Interferometer A.L.L.B.I.N.+ +

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  1. The Dream of not just an Amateur InterferometerA.L.L.B.I.N.+ + Peter Wright E.R.A.C.

  2. ALLBIN is the Excuse to Solve allot of Problems we all have!It,s a Common problem Solving Machine we all need in part or in full to go on further and make Radio Astronomy more fun for Everyone !

  3. Small Dishes and Resolution • Small Dishes have Wide Beam Angles! • Placing 2 dishes East and West on a single Site improves Resolution if all the Signals may be transported via Cables on Site as Phase is the factor governing Fringe Resolution. • Multiple Sites are only possible by using Atomic Clocks or GPS Standards. Wide Distances are possible with Amazing Resolution ALLBIN,s Legitimisation.

  4. Single site high loss System 2 Telescopes Loss Loss Combiner Receiver Computer 300m

  5. Single Site Interferometer RF Amp RF Amp Mixer Mixer IF Amp IF Amp Common Local Osc Low Frequency IF = Long Distances Possible Combiner Going long Distances with the IF is Possible at one site . Receiver Computer

  6. ERAC,s Challenging Solution • Amateur • Linked • Long • Baseline • Interferometer • Network

  7. An ALLBIN Station GPS Ant AD9852 DDS RF Amp 10MHZ Standard House Clock AD9852 DDS Mixer 10Mhz to 1200MHz PLL IF Amp AD9852 DDS Other Receivers AD9852 DDS A/D 40MHz 100MSPS 100MHz CLK Motor Driver Time Computer Computer ERAC Controller Network time Navigation Computer Internet Other ALLBIN Stations Master Station

  8. The ALLBIN Network Master Station Other Clients USA Easy Sky Location 1 Remote Telescope Sites Location 1 Easy Sky Location 2 Location 2 Easy Sky Location 3 Internet RS232 CMD Location 3 RSP Data Computer Other Clients EU ERAC or SARA ERAC Archive Belgium

  9. First of all you need a Dish ? we have found em and are cheep Technische Daten DIAMETER 11.7 Feet / 3.6 meters F/D RATIO 0.36 FOCAL LENGTH 50.12 in. / 127.3 cm GAIN @ 4.2 GHz 42.2 dBi GAIN @ 12.2 GHZ 49.5 dBi FEEDHORN SUPPORT Quad Leg SHIPPING WEIGHT: (Heavy Duty Polar-T Mount) 224 lb. /102 Kg FINISH Black Powder Coat 4,90 mArtNr: 911-0026 €800 www.doebis.de

  10. Problems and Solutions Celestial Navigation and Tracking> Easy Sky Radio Sky Eyes Axis Control> The ERAC dual Axis Controller Receiver Design> Numerous Designs Frequency & Phase Standard> GPS Disciplined Clock Frequency Syntheses to 500MHz > AD9852 DDS Chip Back End Design Numerous Designs Data Processing and Publication Start With Radio Sky Pipe The Mathematics of an Interferometer Network and with it the Software Live Communication between Members and Remote Control /Internet Data Archiving of Observed Data> Eric Smith the ERAC Server Co-ordination of Observational Targets Interaction Between Professional Observers

  11. Celestial Navigation and Tracking Easy Sky from Mathias Busch ! Radio Eyes from Jim Sky Allow both Celestial Navigation and in part Telescope Control Work needs to be done to allow remote control via the web of a telescope this will allow remote tracking the Basis of an Interferometer or joint Observation .

  12. Control Computers Turns Everything off DATA RadioSkyPipe Navigation Telescope Control EASYSKY

  13. Axis Control With the new ERAC Controller it,s possible to move a Telescope with Simple RS232 Commands only. The Navigation Computer may be local or Remote It is cheep, Simple and more important Standardised. MAX186and A/D in General ERAC Axis Controller Motor Driver Manual Joystick

  14. Forget Everything else, Use Windscreen wiper motors

  15. Receiver Design The Receivers are of 2 Types: High grade Multi-role units with front ends and back ends of the Conversion type to a common Back end IF with Common Detection systems like Million channel FFT/KLT or simple wide band Detection so allowing Spectral line work or Continuum work. Dedicated units for things like Radio Jove or Solar Flair work or Radio Meteor Work , it is required to get such data easily also published on the Internet here the MAX186 and Radio Sky Pipe from Jim Sky are the tools to use

  16. Callibration bay Noise Source and Prescishion Attenuator

  17. Frequency and Phase Standard GPS 10MHz Standard With the HP Z3801A GPS Time and Frequency Standard we have an affordable solution to all frequency and timing problems we may have with Interferometer applications or exact Frequency measurement as is the case with Doppler shift Work. EBAY$250 DDS Frequency Synthesiser Students Play ground

  18. Back end The Hardware set up

  19. 10MHZ Clock The GPS Clock $249

  20. DDS Componants 10>100MHz PLL PLL Master 1200MHz Clock DDS Synthesyser 100>300 300>600 600>1200 MHz

  21. Rough AD9852 diagram without RF Filtering of output! Chip configured for Serial command to keep things easy!

  22. Back End Design The Back end is basically a wide band IF Receiver with low noise and high Gain that feeds a modern Detector element such as the AD8313 / AD8307 for Continuum work or an wide Band A/D Converter like the Million channel Spectrum Analyser or a Sound card and a Software solution, here it,s important to have an External Clock giving the Convert Command to the A/D Converter Here the Hardware is Ready the software is however not ! Attention all Programmers

  23. Data Processing and Internet Publication With Radio Sky Pipe from Jim Sky a basic tool is online to publish data using Servers at Telescope Locations and an Unlimited number of Users as Clients all over the world this is the basis of first step publication this will be the benchmark for a later Phase locked Interferometer network , here however allot of new software will have to be written, the major needs however may be learned with Radio Sky Pipe Jim we need you !

  24. Radio Sky Pipe monitoring live data

  25. The Mathematics of an Interferometer Network and with it the Software. If 2 stations are Tracking and the locations are Known as well as the rotational speed of the earth it,s possible to calculate the fringes to get resolution this is however hard especially when more than 2 locations are used and they are not east west of each other , also Digital Phase delay needs to be calculated and simulated to optimise the results , Simulation is the one thing, dealing with real time errors is however the other thing , Pointing error at different locations is a problem that needs to be solved maybe with Single sweep of a known Target and both Axis Frozen to drift through ! A Mathematicians nightmare or his Paradise! Hi Elmar

  26. Live Communications between members The Internet unfortunately is not used for live communications , mails yes but no chatting, this has to be implemented if we are to get on further , we need a live Engineering network because we are spread out all over the World when joint Observations come online this tool is vital . Suggestions Please: Times Dates , tools Yahoo Messenger e.t.c Who will Co-ordinate this Volunteers !

  27. Data Archiving of Observed Data The ERAC Data Server in Belgium by Erik Smith. How to fill it How to read it We need web tools Hi Computer Freaks this is your bit

  28. Co-ordination of Observational Targets We need a co-ordinator who will set Goals and Coach people to reach such Goals , this is at best via ERAC and SARA . Once Data is Gathered he will have to publish the results.

  29. Interaction between Professional Observers Professionals have more money but less manpower than we do. With ALLBIN we wish to build up a system that works , with a bit of Co-ordination it is possible to let Professionals use us to fill in gaps with their own Experiments if the Data is Compatible ! We have Widespread locations which Professionals could use to install Specific Equipment all over the world with Excellent Volunteer Support that they could no afford , this co-operation works both ways and is in the interest of Science, all that is needed is the will to do things Differently! “Amateurs are Professionals with no official Financing”

  30. New Portion , Master does best fit everyone shifts , Repeat , repeat , repeat............... E-mail to get together and do some pre thinking Master Station Polls all stations for this portion only Each Station Interpolates for itself, generates interpolation map file ! Meet in a chat room to do socialising and Pre Run Engineering Master Station does best fit and tells all stations their Shift Using De-central Processing everyone shifts their data file Whole run sent to master via the internet or CDROM Using GPS Time Start and Stop Run Master Station polls everyone and overlays each Package, results Shown online in chat room Master Correlates whole run , fills in on All Sky Survey, suggests next Target,s Publishes Chat room online review and sample zone request

  31. So this is the Starcase to the ALLBIN Heaven

  32. The Start Shot to the Network building Phase has been Sounded please Sign in ! Now we have to build it the new Future of Radio Astronomy for ERAC and SARA

  33. TheEndPeter Wright ERAC This lecture is dedicated to Geli and the rest of the gang at ERAC

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