⚡ Ham Sat Tracker

Welcome to Ham Sat Tracker

A free, web-based satellite pass predictor built specifically for amateur radio operators. Whether you're chasing SO-50, working the ISS, or planning your next portable satellite activation, Ham Sat Tracker gives you everything you need in one place — including real-time antenna pointing via AntTrack.

Features

• Real-time satellite pass predictions — Know exactly when satellites will be overhead
• Doppler-corrected frequencies — Uplink and downlink at AOS, TCA, and LOS. No mental math required.
• Skyview polar plot — See the satellite's track across the sky for each pass
• AntTrack antenna tracker — Real-time compass-based antenna pointing using your phone's sensors. One tap hands off a pass directly to AntTrack pre-loaded with all pass data.
• Offline capable — TLE data is cached locally so the app works in the field without internet
• Grid square support — Enter your location as a Maidenhead grid square (e.g. FN25) or decimal coordinates
• Mobile responsive — Designed for phone use in the field
• Print friendly — Take predictions to the field on paper if needed
• Light and dark themes — Consistent across the predictor and AntTrack

Free Satellites

• SO-50 (NORAD 27607) — FM voice repeater, 67 Hz CTCSS required
• AO-91 (NORAD 43017) — FM voice repeater (Fox-1B)
• AO-123 (NORAD 61781) — FM voice repeater (ASRTU-1), very active
• ISS (NORAD 25544) — FM repeater and voice
• FO-29 (NORAD 24278) — SSB/CW linear transponder
• RS-44 (NORAD 44909) — SSB linear transponder

AntTrack Pro - $9.99 One-Time

Try free for 7 days — no payment required. Unlock the full toolkit for serious satellite work:

• All satellites — AO-7, AO-73, AO-85, JO-97, SO-125 (HADES), PO-101, XW-2A/B/C/F, LO-94, AO-92, AO-109
• 7-day lookahead — plan your operating schedule for the week ahead
• Date picker — select any future date to see passes for that specific day
• One-tap pass → AntTrack handoff — instantly loads pass data into AntTrack, a mobile antenna pointing tool that uses your phone's compass and tilt sensor to guide you in real time as the satellite moves across the sky
• Pass alerts — 5-minute warning with audio chime before each pass you select
• No ads

Learn more about AntTrack Pro →

How It Works

Ham Sat Tracker uses SGP4 orbital mechanics to predict when amateur radio satellites will pass over your location. For each pass, you get:

• AOS (Acquisition of Signal) — when the satellite rises above your horizon
• TCA (Time of Closest Approach) — maximum elevation point of the pass
• LOS (Loss of Signal) — when the satellite sets below your horizon
• Doppler frequencies — corrected uplink and downlink at AOS, TCA, and LOS
• Azimuth and elevation — where to point your antenna at each point

Getting Started

1. Check out the Beginner's Guide to learn the basics
2. Read more on the blog
3. Learn more about the project

73 and see you on the satellites!
Dave Burniston, VE3AKK