Cheap signal generators
Admin
These are readily available covering wide range of frequencies. The one below is presented as an example only.
Admin
Is there a tutorial from Bonn University that demonstrates how professional astronomers convert raw radio data—particularly HI 21 cm observations?
You’re asking about a tutorial from Bonn University that demonstrates how professional astronomers convert raw radio data—particularly HI 21 cm observations—into calibrated intensity measurements. Here’s what I found: Resources at…
How professionals convert raw telescope voltages into intensity maps of hydrogen in different parts of the Milky Way
Great question, Andrew — this is right at the heart of how the Milky Way has been mapped in neutral hydrogen (HI) at 1420.405 MHz. Professional radio astronomers follow a…
Hypernovae
Astronomers have detected events that we classify as “hypernovae.” The word hypernova isn’t an official supernova classification but is widely used to describe the most energetic stellar explosions, usually linked…
What Is the Lichfield Radio Observatory?
Here’s a peek at the Lichfield Radio Observatory (LRO) setup—featuring some of its unique equipment and data visualizations. What Is the Lichfield Radio Observatory? The Lichfield Radio Observatory (LRO) is…
Aperture Synthesis
Aperture synthesis is one of the most powerful techniques in radio astronomy, and it’s the reason we can get very sharp images of the sky even though radio waves have…
RTL-SDR Blog V3 dongle is based on the R820T2 tuner chip
The RTL-SDR Blog V3 dongle is based on the R820T2 tuner chip. Its useful bandwidth is limited by the USB 2.0 bus and the RTL2832U demodulator chip. You can push…
Comparing “RTL2832U SDR” vs “RTL-SDR V3”
Here’s an image of the RTL-SDR Blog V3 dongle for reference. Comparing “RTL2832U SDR” vs “RTL-SDR V3” What’s in a Name? What Makes RTL-SDR V3 Stand Out? TL;DR: V3 vs…
Latest LRO 2D Map of Milky Way Arms 2 September 2025
Result of combining entire available data set start of data collection up to 17 August 2025, from LRO 1, 2, and 3 hydrogen line radio telescopes.
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)
Compare the 3D results below with 2D map using same data: Latest LRO 2D Map of Milky Way Arms 2 September 2025 – astronomy.network The Website of Lichfield Radio Observatory…