apt satellite

Quadrifilar Helix Antennas - The purpose of this page is to provide information and links about Quadrifilar Helix Antennas. It's the best antenna to use for APT satellite reception

Satellite tracking antenna  ^pop - A rugged motorized satellite antenna tracking system for construction by the home handyman

RDF2 two element, close spaced Yagi antenna - This antenna is an adaptation of the RDF2 two element, close spaced Yagi antenna described in the May, 1996 issue of 73 Amateur Radio Today Magazine.

Yaesu FT-101 HF Transceiver Home Page - The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's

ON6SAT Amateur Satellite Links - More than 1200 amateur satellite related links

KEPS Equipments for AO40 downlink - Complete receive system, downconverters, dishes, feeds and preamplifiers for AO40 satellite users

Amateur satellite frequency guide - Amateur Satellite Frequency Guide, Compiled December 1996

Global Positioning System Primer - Welcome to the Global Positioning System (GPS) What is GPS? What is Navigation? GPS Elements Satellites in Space Ground Control Stations and Receivers, How GPS Works - An Amazing System, Military Uses for GPS

GPS Time Series - The Global Positioning System (GPS) is a constellation of 24 satellites which is used for navigation and precise geodetic position measurements.

USCG Navigation Center DGPS - Differential Global Positioning Service (DGPS) is a land-based augmentation system that receives and processes signals from orbiting GPS satellites, calculates corrections from known positions and broadcasts these corrections via a Medium Frequency (MF) Transmitter to DGPS users in the Broadcast Site’s coverage area.

WB2UZR's Info Page - Useful links to various internet linking and satellite pages.

Learn CW On-Line! - Learn the Morse Code (CW) Online, adaptive learning technology focuses on the characters that trouble you most

W6FOG - AMSAT Satellite Training Net

Flysat - Digital satellites Frequency site

Automatic Picture Transmission - Automatic Picture Transmission (APT) is used by Satellites to enable a fully automated unattended reception of the transmitted pictures.

HRPT - NOAA HRPT - High Rate Picture Transmission, the main source of high quality data from polar orbiting meteorological satellites

Battery Universe - Batteries for 2-way radios two way radio laptop camcorder UPS and more. Purchase batteries for your laptop two way radio ups digital camera from Battery Universe.

Batteries.com - Buy batteries for laptop computers, camcorder, lithium, cordless phone, UPS, watch, hearing aid, camera and other power supplies faster, easier and cheaper.

Raodioworld ltd - Supplires of amateur radio equipment and satellite navigation equipment

Swiss Radio International - An online database of Swiss Radio International shortwave and satellite frequencies and schedules which may be searched by language, target country and/or region.

EWTN - Lists the programs and schedules of Global Catholic Radio WEWN, which operates 24 hours daily on WEWN shortwave, via satellite and live audio streams, and also on many AM/FM stations in U.S.A.

Big Fat Tail Productions - PocketSat is a full-featured satellite tracking application for PalmOS and PocketPC devices. It is designed to be usable by both experienced satellite trackers as well as novices who are interested in knowing when they can simply look up and see satellites.

FODtrack Satellite Tracking Interface - Construction tips to build an automatic``satellite tracking rotor controller using``PIC16F877 IC.

Orbitron - Orbitron is a freeware (cardware) application dedicaed to satellite tracking. Allow tracking of ISS, Iridium flares, ham radio satellites, International Space Station, satellite passes prediction, orbits, auto updates and alerting

2m Band VHF antenna pre-amplifier - Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981 Dual-gate MosFet. Gain ~15 dB, NF=1dB.