SATELLITE CATEGORY GUIDE
Amateur Radio Satellite Directory: Orbit Geometry for Ham-Satellite Observing
Amateur radio satellites give radio operators and students a practical reason to understand orbital passes. The category above helps identify catalogued amateur-radio spacecraft and then opens individual trackers for current orbit and observer-relative geometry.
Why pass geometry matters for radio satellites
For a ground station, a satellite contact opportunity depends on more than the spacecraft being somewhere above Earth. Azimuth tells you where to point around the horizon, elevation tells you how high to point, and range changes rapidly through a low Earth orbit pass. Higher passes often give a shorter path through the atmosphere and fewer local horizon obstructions.
Actual radio operation also depends on transmitter status, mode, frequency, antenna system, Doppler shift, licensing and local regulations. This directory does not confirm that a satellite is active on a particular frequency.
Plan an orbital pass
Open an individual object and save your observer location, or use Satellite Pass Predictions to look ahead. Satellites Above Me can provide a current geometry list. Always use authoritative frequency and operating information from the amateur-satellite community before transmitting.
How this directory works
Choose a specific amateur-radio spacecraft before planning a contact. The individual tracker turns that object’s orbital elements into current position and local pass geometry, which helps with antenna pointing and timing. Frequency, mode and operating status still need to come from authoritative amateur-satellite sources.
Pass geometry can be calculated from public orbital elements, but radio success depends on much more than orbital position. Element age, Doppler shift, equipment, antenna pattern, horizon obstruction and the spacecraft’s actual transmitter status all affect a real contact attempt.
What to remember about accuracy
Frequently asked questions
Is the position direct spacecraft telemetry?
No. The live map is calculated from public orbital elements.
Does appearing in this directory mean a satellite is operational?
No. Catalog membership and mission status are different things.
Can I track one object in more detail?
Yes. Open the selected amateur satellite’s tracker, save your observer location and use the pass geometry there; verify current frequencies and operating modes separately.
Sources and related tools
- CelesTrak: General Perturbations data formats
- AMSAT: Amateur satellite information
- SpaceTracker.live Satellite Directory
- How SpaceTracker.live calculates positions
Educational-use note: SpaceTracker.live is an independent educational website. Positions and pass predictions are calculated from third-party orbital elements and may be delayed or approximate. Do not use them for navigation, collision avoidance or other safety-critical decisions.