Northern Lights Software Associates -  .

Amateur Radio Satellite Tracking 2003 - - Portal site listing a wide variety of information related to satellite tracking, including satellite list and news.

AMSAT - - Information regarding amateur radio satellite communications. Also available are Keplerian elements in several formats, updated weekly.

AO-10 - - Information about AO-10, including status updates on a periodic basis.

CelesTrak - - Keplerian elements for most satellites in low-earth orbit. Also includes historical archives dating back to 1980 and information about satellite tracking.

Clarke Belt Calculator - - Given a file with satellites' Two-Line Element (TLE) you can calculate a list with the azimuth, elevation and range for any point on earth.

FODtrack Satellite Tracking Interface - - Construction tips to build a amateur radio satellite tracking dual-axis rotor controller using a PIC16F877 IC.

G-Predict - - Free, real-time satellite tracking and orbit prediction software.

Heavens Above - - Real-time satellite, ISS, and Space Shuttle orbital pass information, maps, star and charts.

LogSat - - Advanced software, with features including antenna radiation maps for optimal satellite coverage.

Orbitron - Satellite Tracking System - - Shows positions of satellites at any given moment in real or simulated time. Free download (Cardware). [multi-language.

P3D Article by KA0SNL - - Discusses main design goal of making satellite operations less complex and less expensive for operator on the ground. Includes photographs.

Project Oscar - - International amateur satellite organization - web site contains info about amateur satellites, operating information, status of individual satellites and an online tracking application.

Real-time ISS Shuttle Data - - NASA information on the International Space Station's whereabouts, Keplerian elements for the ISS and Shuttle, and sighting prediction information.

Safety Track - - Global Positioning System for law enforcement, private and commercial users to track vehicles. Complete information, plus a demo.

Satellite Index Project - - Graphical and real-time information on satellite locations.

Satellite Tracking Prediction Form - - Satellite tracking pass predictions includes by state listings, and related resources.

SatScape - - Windows tracking software; features include 3D maps and can track several hundred satellites simultaneously.

SatSignal & WXtrack - - Satellite tracking and decoding software, including WXtrack, WXtrackGL, SatSignal, GeoSatSignal, and the HRPT Reader is available for download.

Southern Africa Amateur Radio Satellite Association - - Resource includes visual and RF satellite contact schedules. [English.

Timestep Weather Satellite Systems - - Hardware/software products to receive data from weather satellites, for the amateur radio enthusias.

UK Satellite Feeds - - Satellite feeds, listings, and free channels across Europe.

WinOrbit Home Page - - Free satellite tracking software for Windows 3.x.