Tagged: rtl-sdr

Weather Satellite HRPT and LRPT Megaprojection Project Nov 30 – Dec 1

Over on the /r/amateursatellites subreddit, user elmarkodotorg is organizing a group megaprojection project. The Megaprojection Project seeks to create a composite of as much of the earth as possible from weather satellite images captured by hobbyists in a single day, via data from NOAA and Meteor polar-orbiting satellites. They will be accepting HRPT or LRPT data from either Nov 30 or Dec 1 (date yet to be confirmed).

Hobbyists can receive these satellites' LRPT and HRPT signals using an RTL-SDR and appropriate antenna setup.

If you want to contribute, you can join DerekSGC's Discord server, https://sgcderek.github.io, where coordination will be carried out. elmarkodotorg writes that currently, they have confirmed contributors with stations from the west coast of the US all the way over to the western edge of Asia. Currently, they are still hoping to find contributors from the Canary Islands, Turkey, Equatorial Africa, the general area of Indonesia, and Northern Australia. In a more recent Reddit thread, elmarkodotorg provides a link to a Google docs sheet, where you can also register interest.

Recently, on November 16 a test was carried out and they were able to successfully combine 24 images received across the world.

Megaprojection Nov 16 Test: 24 contributors from all over the world submitted HRPT and LRPT images received from their home satellite ground stations.
Megaprojection Nov 16 Test: 24 contributors from all over the world submitted HRPT and LRPT images received from their home satellite ground stations.

Paper on Building a Low Cost RTL-SDR Based Hydrogen Line Radio Telescope

Back in 2020, we posted a tutorial on how to set up a low-cost Hydrogen Line radio telescope using an RTL-SDR, LNA, and WiFi grid antenna. Since then we have seen similar setups successfully replicated in the community many times.

In a recent Hackaday post, we discovered a paper by Jack Phelps who has written an in-depth technical and scientific description of his attempt at Hydrogen line radio astronomy with similar equipment. His paper goes into deeper scientific explanations and describes the experiment and hardware setup in detail including some signal processing, observation, and calibration equations that might be useful for those looking to understand the science more deeply. 

Jack Phelps Radio Astronomy Setup and some Results
Jack Phelps Radio Astronomy Setup and some Results

Setting up an ADS-B Radar in a Vehicle Android Head Unit

Over on YouTube channel 'TAKEAPART' has uploaded a short video showing how he tracks aircraft via an RTL-SDR Blog V3 dongle and his car's Android head unit. The head unit is capable of running the ADS-B Radar App available on the Google Play store.

Once the app is installed, it's a simple matter of plugging in the RTL-SDR Blog V3 unit and running the app to start tracking aircraft.

How to ADS-B Radar in the CAR - Tracking Planes...

A Video on Radar-TUI: A Terminal User Interface Based ADS-B Display

Back in 2022 we first posted about adsb_deku and radar-tui, a TUI (terminal user interface) for displaying ADS-B aircraft locations with an RTL-SDR receiver. A terminal user interface means that no desktop GUI is required, instead, the map and aircraft are drawn in the terminal window using just text characters.

adsb_deku and radar-tui are based on the open-source ratatui library. Recently, Orhun, one of the maintainers of ratatui wrote in and wanted to share a YouTube video he created demonstrating radar-tui in action. In the video, Orhun explains the RTL-SDR, shows how to set up radar-tui, and shows a demo of it in action.

If you're interested in this type of application, another similar terminal based ADS-B UI is coole-radar which we also posted about previosuly in 2019.

RADAR-TUI: View planes around you from the terminal! (Terminal Tool of the Week #1)

Guglielmo FM and DAB Receiver Software Updated to Version 0.6

Thank you to Marco, Guglielmo's programmer, for letting us know that his software has recently been updated to Version 0.6.

Guglielmo is Linux, Windows (and, in this recent update, x86 MacOS) based RTL-SDR FM and DAB tuner software that supports SDRs, including the RTL-SDR, Airspy, SDRplay, HackRF, and LimeSDR. It is designed to be easy to use for media users rather than hobbyist technical users.

Version 0.6 fixes bugs and adds the following features:

  • Software automatic gain control
  • Support for multiple devices for RTL-SDR and SDRplay
  • Support for RTL-SDR V4
  • New RTL-SDR and SDRPlay device drivers
  • New Portaudio sound driver
Guglielmo: Screenshot of the DAB Interface

SatDump 1.2.1 Released

SatDump is a popular program used to receive and decode images and other data from various weather satellites. SatDump works great RTL-SDR Blog dongles and with our Discovery Dish, an easy-to-use dish and feed for receiving L-band and other weather satellites. Recently SatDump version 1.2.1 was released, which brings several new features including:

  • Meteor-M Calibration - Temperatures and radiances are now available from the Meteor-M infrared channels, including enhancements like Cloud Top IR.
  • Archive Loader & EUMETSAT Archives (and EUMETCAST) Support: Metop, Meteosat, Sentinel-3 and more! - Users can now open data from the EUMETSAT archives in SatDump.
  • Windows ARM64 Support - One of the few SDR programs that has Windows ARM64 support.
  • JUICE Support - JUICE (JUpiter ICy moons Explorer) is an ESA probe tasked to study three of the Galilean moons of Jupiter, namely Ganymede, Callisto and Europa. During a recent Earth slingshot it was possible to receive.
  • AIRS and CERES Support - Hyperspectral sounder and radiation budget instruments on the Aqua satellite
  • Arctic Weather Satellite Support - AWS is a weather satellite recently launched in July 2024 with 1707 MHz downlink and similar parameters to METOP, so it should be accessible to many.
  • IASI (imaging channel) Calibration - Calibration for the hyperspectral sounder onboard METOP satellites.
  • GOES-R L2 Product Support - Pre-processed models from NOAA that include Rain Rate per Quarter Hour, Land Surface Temperature, Sea Surface Temperature, and more.
  • GOME Fixes - True Color for METOP satellites.
  • Miscellaneous AVHRR and MHS Fixes - Calibration stripes and other strangeness is less likely to occur even with a bad signal.
  • Miscellaneous Composites - Many new composites are available.
  • Automatic Filename Templating - Customizable filename templates
  • More Quality-of-Life Features - Various tools and warnings added
  • RFNM Support - Support for the new RFNM SDR
  • Library Directory Fixes on Linux - Fixes SatDump on Gentoo and OpenSUSE among others.
  • Advanced Mode - Lets you change all TLE settings, composite configs, default pipeline settings, and more
  • Themes - Various new themes added
  • More Satellites Support - Initial support for XMM-Newton, VERONIKA and ACE
  • Experimental Windows XP Support - A special version of SatDump now runs on Windows XP SP3.
  • Various Bug Fixes
SatDump Running on Windows XP
SatDump Running on Windows XP

Turning an Elecrow Pi Terminal into a Standalone SDR Radio with an RTL-SDR Blog V4

Over on YouTube Mirko Pavleski has uploaded a video showing how he took a US$199 "Pi Terminal-7” 1024*600 All-In-One Module Raspberry Pi" from Elecrow, and combined it with an RTL-SDR Blog V4 to create a portable standalone SDR radio platform. 

The build includes a cooling fan, external WiFi antenna, speaker, power switch and physical tuning knob. The built-in Raspberry Pi 4 compute module runs the HamPi image which includes multiple free SDR programs. In the video, Mirko shows the system in action with it running SDR++ and GQRX.

Mirko has also provided a text guide that explains how to replicate his setup.

How to turn a 7 inch Elecrow Pi Terminal into a standalone SDR Radio

Building an “HF Helper” for Improving RTL-SDR HF Reception

Over on YouTube Amateur Radio VK3YE has uploaded a video showing his 'HF Helper' project. The HF Helper is a tunable HF filter and attenuator that helps improve HF reception when in the presence of strong overloading signals. VK3YE writes:

Using an RTL-SDR.COM dongle (genuine model V4) and a computer with SDR Sharp you can get quite good reception of HF signals. However reception can sometimes be spoiled by overload from signals on or away from the desired reception frequency. The 'HF Helper' presented here can reduce these problems. And you can use it in conjunction with a QRP transmitter to form a simple transmitting station.

RTL SDR HF Helper improves reception

Also as a bonus, in a related video VK3YE also shows the RTL-SDR Blog V4 being used on SDR Touch on an Android phone for portable HF, VHF and UHF reception.

Hear HF VHF UHF on an Android phone