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astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Astronomy observatory in Staffordshire, England.

astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Astronomy observatory in Staffordshire, England.

  • Live feeds at Lichfield Radio Observatory (LRO)
  • Calculators
  • Telescopes & Associated Equipment at Lichfield Radio Observatory
  • History and description of Lichfield Radio Observatory (LRO)
  • Publications & Presentations
  • Links to other observers’ SID monitoring sites
  • SHOOS – SARA Hydrogen-Observing Overall Survey
  • Contact me
Radio Interferometry

Open-source software tools and libraries for interferometry / correlator / radio astronomy

Admin September 19, 2025 No Comments

There are several open-source software tools and libraries for interferometry / correlator / radio astronomy work. Depending on how much of the pipeline you want (just correlation, calibration + imaging,…

Building radio telescopes

The “loss surface area” from a prime-focus feed

Admin September 19, 2025 No Comments

The “loss surface area” from a prime-focus feed is just the blocked (shadowed) aperture from the feed assembly (feed + support struts). You can estimate it with: So: Ablocked≈Afeed+N w D2,Fraction blocked=AblockedAdishA_\text{blocked}…

Building radio telescopes

Typical weight of plywood used to make ribs on homemade radio dish

Admin September 19, 2025 No Comments

The weight of a 6 ft × 4 ft sheet of plywood depends on its thickness and the wood species/density. Let’s go step by step: 1. Area of sheet 6…

Building radio telescopes

Typical weight of 5 ft × 5 ft sheet of fine aluminium window screening used to cover homemade radio dish

Admin September 19, 2025 No Comments

Weight of a 5 ft × 5 ft sheet of fine aluminium window screening. Let’s work it out step by step: 5 ft×5 ft=25 ft^2. 25 ft^2×0.035 lb/ft^2≈0.875 lb. That’s…

GNU Radio Windows

GNU Radio error “missing xterm” when installed under Windows 11

Admin September 18, 2025 No Comments

Great 👍 let’s pin down what’s pulling in xterm. On Windows GNU Radio Companion (GRC), that usually comes from a block that has its “Command” field hard-coded to xterm -e…

Radio observation in hydrogen line (1420MHz)

Comparing signal attenuation at 1420 MHz in short 30cm jumper coaxial cables RG174 vs RG316

Admin September 18, 2025 No Comments

For a 30 cm jumper at 1420 MHz (H I line), RG174 and RG316 are effectively neck-and-neck—both cost you ~⅓–½ dB pre-LNA. Quick comparison (30 cm @ ~1.5 GHz) That…

GNU Radio

GNU Radio Error Message “unable to scan ip19”

Admin September 18, 2025 No Comments

That error message — “unable to scan ip19” — isn’t a standard GNU Radio error on its own. It usually comes from an underlying hardware driver or device source block…

GNU Radio

GNU Radio Error Message “unable to scan ip19”

Admin September 18, 2025 No Comments

That error message — “unable to scan ip19” — isn’t a standard GNU Radio error on its own. It usually comes from an underlying hardware driver or device source block…

GNU Radio

GNURadio Cookbook – RTL-SDR Radio Setup With GNURadio Companion

Admin September 17, 2025 No Comments

Thursday, August 8, 2024 This is a very useful website (not edited by myself) – link below: RTL-SDR Radio Setup With GNURadio Companion: GNURadio Cookbook – A collection of recipies…

GNU Radio

GNU Radio standard ways to save raw or processed data streams from an SDR

Admin September 17, 2025 No Comments

In GNU Radio you’ve got a few standard ways to save raw or processed data streams from an SDR (like your RTL-SDR or RSPduo) directly from a flowgraph or a…

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Categories

  • ADVISORY NOTICE & DISCLAIMER
  • Aerials & Antennae
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  • Uncategorized
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Recent Posts

  • How to fix “rtlsdr module not found” error when running ezRA (Easy Radio Astronomy by Ted Cline) under Microsoft Windows
  • Photos and video of the PCB from Ettus B210 clone I purchased from Aliexpress
  • Comments on using Leo Bodnar LBE-1421 to produce 1 PPS output
  • Planned ALAN Radio Telescope Field of View at 1420 MHz at Walsall Astronomy Group, UK
  • I see some people give times as eg 1200Z what does the Z mean?

Recent Comments

  1. Interpretation of results from first successful rubidium lock achieved with 5650A – astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO) on First successful rubidium lock achieved with 5650A rubidium time source 12 September 2026
  2. Admin on Latest working version of ezColGR – provides FFT 512 bins with Airspy Mini and saves data in ezRA text file format 10/7/2026
  3. Bill Sneed on Latest working version of ezColGR – provides FFT 512 bins with Airspy Mini and saves data in ezRA text file format 10/7/2026
  4. Floyd on How would I convert the plots on ezCon from ezRA (Easy Radio Astronomy Software written by Ted Cline) into dB?
  5. Floyd on Which state hosts Green Bank Observatory in the USA?

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You missed

Uncategorized

How to fix “rtlsdr module not found” error when running ezRA (Easy Radio Astronomy by Ted Cline) under Microsoft Windows

Uncategorized

Photos and video of the PCB from Ettus B210 clone I purchased from Aliexpress

Uncategorized

Comments on using Leo Bodnar LBE-1421 to produce 1 PPS output

Uncategorized

Planned ALAN Radio Telescope Field of View at 1420 MHz at Walsall Astronomy Group, UK

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astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Astronomy observatory in Staffordshire, England.

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