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astronomy.network The Website of Lichfield Radio Observatory (LRO)

astronomy.network The Website of Lichfield Radio Observatory (LRO)

Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net

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September 19, 2025 Admin

Effect of blockage prime focus waveguide and supports on radio dish – diagrams and beam cuts

Modelling a 3 m dish at 1420.405 MHz in two ways: You’ll see: Diagrams: •           Unblocked beam 2D: •           Prime-focus

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September 19, 2025 Admin

Diffraction effects on prime focus radio dishes

This comes up a lot in both radio astronomy and satellite communication when using prime-focus reflectors. On a prime-focus parabolic

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September 19, 2025 Admin

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

There are several open-source software tools and libraries for interferometry / correlator / radio astronomy work. Depending on how much of

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September 19, 2025 Admin

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

The “loss surface area” from a prime-focus feed is just the blocked (shadowed) aperture from the feed assembly (feed + support

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September 19, 2025 Admin

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

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

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September 19, 2025 Admin

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

Weight of a 5 ft × 5 ft sheet of fine aluminium window screening. Let’s work it out step by

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September 18, 2025 Admin

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

Great 👍 let’s pin down what’s pulling in xterm. On Windows GNU Radio Companion (GRC), that usually comes from a

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September 18, 2025 Admin

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

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

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September 18, 2025 Admin

GNU Radio Error Message “unable to scan ip19”

That error message — “unable to scan ip19” — isn’t a standard GNU Radio error on its own. It usually comes from

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September 18, 2025 Admin

GNU Radio Error Message “unable to scan ip19”

That error message — “unable to scan ip19” — isn’t a standard GNU Radio error on its own. It usually comes from

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Recent Posts

  • Effect of blockage prime focus waveguide and supports on radio dish – diagrams and beam cuts
  • Diffraction effects on prime focus radio dishes
  • Open-source software tools and libraries for interferometry / correlator / radio astronomy
  • The “loss surface area” from a prime-focus feed
  • Typical weight of plywood used to make ribs on homemade radio dish

Recent Comments

  1. What Is the Lichfield Radio Observatory – astronomy.network The Website of Lichfield Radio Observatory (LRO) on Latest Milky Way 1420MHz hydrogen map from Lichfield Radio Observatory (LRO) 2/12/2024 from data 6/1/2024-30/11/2024
  2. Fly-through of 3D plot of Milky Way Spiral Arms created using data from LRO 1, 2 and 3 radio telescopes from start of data collection to 17 August 2025 (extended 3D slices revised version 4 September 2025) – astronomy.network The Website of Lichfiel on Latest LRO 2D Map of Milky Way Arms 2 September 2025
  3. Fly-through of 3D plot of Milky Way Spiral Arms created using data from LRO 1, 2 and 3 radio telescopes from start of data collection to 17 August 2025 (extended 3D slices version 2 September 2025) – astronomy.network The Website of Lichfield Radio on Latest LRO 2D Map of Milky Way Arms 2 September 2025
  4. Admin on In Debian and its derivatives (like Ubuntu, Raspbian, etc.), there’s no official meta-package specifically for radio astronomy
  5. Ole Streicher on In Debian and its derivatives (like Ubuntu, Raspbian, etc.), there’s no official meta-package specifically for radio astronomy

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