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P4-A narrowband transponder Operating Guidelines and Band Plan, coverage map of the QO100 geostationary amateur radio satellite

An exaustive article on how to receive the QO-100 geostationary satellite, that carries transponders usable by amateur radio operators

A Dutch website dedicated to weather satellite reception with many documents related to antennas, software and techniques on receiving signals from weather satellites.

OpenHamClock is a modern, open-source dashboard for amateur radio operators, designed as a web-based successor to the original HamClock. Deployable locally on a Raspberry Pi or via the cloud, it centralizes essential DX operations into a single, intuitive interface. At its core is an interactive world map that visualizes real-time DX spots, signal paths, satellite tracking, and POTA activators. The software seamlessly integrates critical tools like WSJT-X, DX Cluster, and PSKReporter for monitoring digital traffic. Additionally, it provides vital environmental data, including real-time space weather indices, solar activity, and personalized HF propagation predictions. With customizable themes and a modular architecture, OpenHamClock offers modern operators comprehensive, at-a-glance situational awareness of global radio conditions

Ham radio blog dedicated to WX Sat reception in particular NOAA satellites, antenna homebrewing and beacon reception by F4CWH

This is a short version, the final of the article describing how to build the Weather satellite 137 MHz horizontal V-dipole antenna.

Personal web site by Joe PS8ET an active amateur radio operator from Brazil very active both on HF bands and on Ham Radio Satellites.

Ham radio, amateur radio, satellite communication, radio, radios,antenna, antenna design, yagi, cross yagi, power divider, splitter, Brisbane.

An online reference table with Satellite information including current status, uplink and downlink frequencies.

Getting started on receiving the QO-100 satellite using standard satellite LNBs and a 60cm dish

The Spectrum Monitor, amateur, shortwave AM FM TV Scanning Satellite magazine, is edited and published by Ken Reitz KS4ZR, former managing editor, features editor, columnist and feature writer for Monitoring Times.

Before the advent of satellite communication, maritime communication adhered to an international protocol requiring ships and coastal stations to observe silent periods twice an hour, reserved specifically for emergencies. These silent periods were marked by red sectors on the 500 kHz frequency and green sectors on the 2182 kHz frequency. The 4-second red bars facilitated the manual transmission of the SOLAS distress signal.

In this article author illustrate a homemade yagi antenna for satellite operations. The antenna includes a VHF antenna and an UHF antenna with a band splitter.

AMSAT-DL International Satellites for Communication, Science and Education.

Receiving & Decoding NOAA Weather Satellites using a simple rtl-sdr dongle, a helix antenna and a Windows PC

The Meteor-M N2 is a polar orbiting Russian weather satellite that was launched on July 8, 2014. Its main missions are weather forecasting, climate change monitoring, sea water monitoring/forecasting and space weather analysis/prediction. Meteor-M N2 transmits images using the digital LRPT protocol at around 137.1 MHz with can be received with an RTL-SDR.

The MiniTioune receiver project, developed by Jean-Pierre F6DZP, consists of the home constructed MiniTiouner hardware which interfaces via a standard USB 2.0 port to a Windows PC running the MiniTioune software. It can be used to receive satellite broadcasts transmissions making it ideal for use on Q-oscar 100 Es hail-2 without any external frequency converters.

Pass Recorder is a small application that records audio from satellite passes based on tracking data it receives from the commonly used SatPC32 application

Explore the detailed setup, essential software, and operational nuances for Greencube (IO-117), a Medium Earth Orbit (MEO) satellite with a 70cm digipeater, offering DX possibilities for amateur radio enthusiasts. From antenna configurations to software choices, this guide covers everything for a successful Greencube experience.

Construction of an antenna for experimental satellite communication, 8el. (435 Mhz) x 4el. (145 Mhz) Satellite Yagi crossed. No difficulty to built this antenna. Except the gamma match. that requires a little more attention

Time Mapper UHD is a versatile mapping and time visualization program offering multi-satellite viewing with frequency display and unique country-pairs for PskReporter data. It features live feeds from logging programs and can plot ADIF files. Ideal for schools, offices, or amateur radio stations, it provides customizable 4K or HD world clock displays with over 60 map layers, including ham radio zones and natural features. The program supports various time functions and can import logs for detailed analysis. It runs on Windows 10 or 11 and offers a 30-day free trial.

All Satellites Frequency List Update. A complete list of satellite frequencies available in several formats, including info on Satellite Uplink and Downlink frequencies Beacon, operative Mode, Callsign and Weather sat functionality.

This article provides a step-by-step guide for assembling a Raspberry Pi-based Satellite Tracker Interface, designed to work with Green Heron Engineering's RT-21 controllers and MacDoppler software. The guide covers hardware assembly, SD card image installation, and system configuration for satellite tracking.

Practice these operating techniques so you will be ready to capture that 100-point bonus on Field Day. QST Article

A nice QRP, EME, satellites, VHF DX, Amateur radio blog by Lars Petersen OZ1BXM

Here are some hints and tips for construction of a good preamp for satellite work.

Low Cost Satellite Antennas article was originally presented at a Project OSCAR seminar on September 30th, 1990. AMSAT-UK printed an abridged version of this presentation in their OSCAR News, Number 88, April 1991. The original presentation has been reedited and updated for AMSAT's Web page.

Status of active Satellites on Amateur Radio Frequencies

Amateur radio blog about Homebrew equipment,ham radio antennas, satellites, QO-100 operations, rf amplifiers, 2m ldmos amplifier, 70cm ldmos amplifier, 23cm ldmos amplifier

Receiving NOAA weather satellite images using a Raspberry PI with a RTL dongle and a Turnstile crossed dipole automatically.

The article describes the construction of a Lindenblad antenna, which is well-suited for receiving signals from low-orbiting weather satellites. The key points are: The Lindenblad antenna has an omnidirectional horizontal radiation pattern and is optimized for low to medium elevation angles, making it ideal for tracking passing satellites near the horizon. It is designed to receive circular polarization, which is common for weather satellite signals. The antenna is constructed using 4 folded dipole elements arranged on a cross-shaped frame. The necessary materials include a plastic junction box, PVC tubing, and aluminum rods to form the dipole elements. The article provides detailed instructions for preparing the components, assembling the dipoles, and connecting the feed lines to create the complete antenna. The completed antenna can be mounted on a vertical support, with the dipole elements angled at 30 degrees from horizontal, to optimize reception of the passing satellites. The author notes that the design was originally published in a now-defunct magazine, Meteo Satellite Inf", in 1993

An ingenious portable satellite antenna designed for the IC-705. Addressing its lack of full duplex, the IC-705’s Split Mode enables FM satellite communication, with memory channels programmed for Doppler correction. The antenna combines a 2m Moxon and 70cm Yagi for mechanical simplicity and a single feed point, ideal for handheld use. Built with 3D-printed parts, TIG welding rods, and PVC pipe, it’s lightweight, transportable, and effective. STL files and detailed instructions ensure easy replication for enthusiasts.

This Satellite Antenna Elevation System project involves mounting horizontally polarized Yagi antennas on a fiberglass reinforced polymer (FRP) crossboom. A Yaesu G-800DXA azimuth rotator is in place, requiring only an elevation rotation system. Elevation is controlled by a 12VDC linear actuator connected to a U-bolted arm on the crossboom, rotating within a DIY bearing arrangement. Common handyman tools suffice for assembly. The setup includes FRP crossboom, aluminum tubing, PVC couplers, nylon camshaft bushes, and a K3NG-based controller for azimuth and elevation control. Detailed guides and resources are available online.

SatNOGS DB is an effort to create an hollistic, unified, global database for all artificial objects in space (satellites and spacecrafts). You can view and export the data, contribute to it, or even connect your application using API.

By WA4DAN N2IEN WW2DX AA4NC K5DHY W4DKS VA3QR; 160-6m; CW SSB FT8 + EME satellite Jul 31 -Aug 8 -2019

SkyRoof is an open-source, 64-bit Windows application designed for amateur radio operators and satellite enthusiasts, combining satellite tracking and Software Defined Radio (SDR) functionality in a unified platform. The software provides real-time satellite tracking, pass predictions, and visual representations through Sky View, Earth View, and Timeline displays. It features an SDR-based waterfall display covering VHF/UHF satellite segments with Doppler-corrected frequency scales, automatic satellite labeling, and visual tuning capabilities. SkyRoof supports various SDR devices (Airspy Mini, SDRplay, RTL-SDR), external transceiver CAT control, and antenna rotator integration. The application automatically downloads satellite data from SatNOGS and other sources, offers voice announcements for satellite passes, and includes comprehensive frequency control with Doppler tracking, manual corrections, and RIT functionality for enhanced satellite communication operations.

This website serves as a platform for announcing satellite activities, allowing amateur radio operators to publicize their plans for upcoming scheduled passes. It also offers a useful scheduling feature that provides satellite pass information tailored to your location, which you can input by entering your locator.

This page provides information and links about Quadrifilar Helix Antennas, the best antenna for APT satellite reception. It explains the basic design and configuration of QHA, including the research and developments that have been made over the years. The page offers insights into the radiation patterns and benefits of using QHA for APT ground stations, with examples of polar diagrams. If you are interested in learning more about QHA and its applications, this page is a valuable resource.

When new to the 2-meter FM transceiver, securing a quiet frequency for chatter seems straightforward, but it's essential to navigate FCC rules and band plans effectively. Even though frequency allocations are consistent above 50 MHz for Technician licenses, adherence to specific segments within the 2m band—ranging from 144 MHz to 148 MHz—is crucial. This includes respecting designations for different modes like CW, SSB, and FM to prevent interference, particularly with satellites and exotic modes like EME. Understanding and following the structured band plans not only ensures legal compliance but also optimizes frequency use and minimizes disruptions in the amateur radio community.

Fully functional weathervane conceals an efficient 2- meter base-station antenna. Your Neighbors and HOA won’t know it’s there and they will love the rooster-vane. The Rooster-Tenna is a covert 2-meter ham radio antenna disguised as a functional weathervane, ensuring seamless integration into residential environments. This improved version features a wide-spaced parallel-fed folded dipole in a compact skeleton slot design. Constructed from aluminum tubing and acrylic supports, it offers omnidirectional, vertically polarized performance suitable for repeater and satellite use. Easy to mount and tune, it achieves a low SWR across the 2m band. With 3D-printable parts available, the Rooster-Tenna blends practicality with stealth, making it an ideal solution for HOA-restricted areas

Zenith Tracker offers real-time satellite tracking, pass predictions, and radio hardware integration for ham radio operators. The platform includes an interactive world map showing satellite positions, footprints, and ground tracks, as well as a polar radar visualization for detailed pass analysis. Users can view upcoming passes, set filters, and receive notifications. Integration with CSN Technologies S.A.T Hardware and QTRigDoppler allows for automatic radio control, antenna tracking, and transponder management. The platform also offers APRS message interface, grid square-based location input, and API integration for rover activations. Zenith Tracker is recommended for both general users and those needing advanced hardware integration.

SAT_EXPLORER is a versatile software for tracking the Moon, Sun, and artificial satellites while controlling various antenna interfaces. Compatible with Windows XP and later (32/64-bit) and multilingual (English, French, German, Italian, Spanish), it integrates seamlessly with TRX-Manager for transceiver control. SAT_EXPLORER computes satellite and Moon positions with high precision, calculates EME Doppler shifts, and uploads real-time satellite positions and coverage maps to your personal web pages. Linux/Ubuntu users can run it using WINE or CROSSOVER.

The Greencube Terminal Program enhances communication with the Greencube/IO-117 satellite by enabling message exchange via a PC's soundcard and integrating with multiple loggers like ACLog and Cloudlog. It supports new contact identification through an ADIF file, featuring a color-coded "Dupelist" for tracking unconfirmed contacts and grids. The software is compatible with voice notifications for efficient satellite communication management.

The Beam project offers various features for controlling antenna rotators, including support for 2 or 4 line LCD displays, software or hardware clocks, open collector drives for azimuth and elevation control, and internal calculations for tracking the sun and moon. It can also track satellites and supports "Flip Mode" for inverted antennas. The 4-line version provides detailed readouts while the 2-line version offers a more compact display. New versions now support PWM and I2C H-bridge modes for adjustable speed control at the end of a move.

A multi editor blog about ham radio satellites operations

The Slim Jim VHF antenna, originally designed by G2BCX, is a folded half-wave dipole fed by a quarter-wave matching section. This version, built from a recycled professional aluminum dipole, demonstrates that various materials—such as copper, brass, or twin-lead—can be used. The article details the antenna’s construction, required materials, and tuning process, emphasizing mechanical stability and ease of assembly. With proper adjustment of the feed point, it provides excellent SWR across the band. Its durability and simplicity make it a practical and efficient VHF antenna solution.

RSGB page dedicated to CubeSats and FunCube satellites used by radioamateurs

Manufacturers of roof towers ideal solution for HOA restrictions, Limited lot space, 2nd or 3rd tower and perfect for satellite & ISS

SAT filters ensure effective full-duplex satellite QSOs by mitigating interference between 145 MHz uplink and 435 MHz downlink signals. Custom coaxial and SMD-based filters address transmitter harmonic interference and improve receiver isolation, achieving over 70 dB suppression in the undesired band. Designed for simplicity, these filters maintain optimal VSWR and are housed in shielded brass enclosures. Practical implementations with Yagi antennas demonstrate compatibility with SDR systems, enabling seamless communication even in challenging satellite conditions, such as low-elevation passes and DX pile-ups.

Remote control software for an icom 9700 focused on satellite communication and ease of use. It's got lots of features, but some standout features include full duplex doppler control by Gpredict or SatPC32, integration with the RC-28 controller and callsign lookup/logging within the app.