Gourt > Recreation > Radio > Amateur > Satellite Tracking
Satellite navigation systems allow small electronic devices to determine their location (Longitude, Latitude, and Altitude) in within a few metres using time signals transmitted along a line of sight by radio from satellites. Receivers on the ground with a fixed position can also be used to calculate the precise time as a reference for scientific experiments. The Global Positioning System is the only fully functional satellite navigation system as of 2006.
History and theory
An early predecessor were the ground based LORAN and Omega systems, which used terrestrial longwave radio transmitters instead of satellites. These systems broadcast a radio pulse from a known "master" location, followed by repeated pulses from a number of "slave" stations. The delay between the reception and sending of the signal at the slaves was carefully controlled, allowing the receivers to compare the delay between reception and the delay between sending. From this the distance to each of the slaves could be determined, providing a fix.
The first satellite navigation system was Transit, a system deployed by the US military in the 1960s. Transit's operation was based on the Doppler effect: the satellites traveled on well-known paths and broadcast their signals on a well known frequency. The received frequency will differ slightly from the broadcast frequency because of the movement of the satellite with respect to the receiver. By monitoring this frequency shift over a short time interval, the receiver can determine its location to one side or the other of the satellite, and several such measurements combined with a precise knowledge of the satellite's orbit can fix a particular position.
More on [ Satellite navigation system ]
#weather, #tropical_weather: Charts & satellite photos for Tropical Cyclone Tracking updated through 0330Z 9 Dec. http://bit.ly/ibFvN
tenspider (Ten Spider) Wed, 09 Dec 2009 04:35:51 -0000
#weather, #tropical_weather: Charts & satellite photos for Tropical Cyclone Tracking updated through 0330Z 9 Dec. http://bit.ly/ibFvN
@astrogerly Dunno if you're interested, but I have a half-finished satellite tracking program that replaces the desktop.
jetforme (Rick) Wed, 09 Dec 2009 03:35:59 -0000
@astrogerly Dunno if you're interested, but I have a half-finished satellite tracking program that replaces the desktop.
#weather, #tropical_weather: Charts & satellite photos for Tropical Cyclone Tracking updated through 0030Z 9 Dec. http://bit.ly/ibFvN
tenspider (Ten Spider) Wed, 09 Dec 2009 02:23:07 -0000
#weather, #tropical_weather: Charts & satellite photos for Tropical Cyclone Tracking updated through 0030Z 9 Dec. http://bit.ly/ibFvN
DIGITAL - The Satellite in the SKY is pointed at a certain angle and anything with a CHIP in it - can be used as a TRACKING DEVICE.
Loria12 (Loria Grinnage) Tue, 08 Dec 2009 21:44:35 -0000
DIGITAL - The Satellite in the SKY is pointed at a certain angle and anything with a CHIP in it - can be used as a TRACKING DEVICE.
Download MacDoppler:Satellite tracking & station automation. http://www.soft-files.com/macdoppler_70032.html
softfiles (Soft-Files.com) Tue, 08 Dec 2009 17:52:46 -0000
Download MacDoppler:Satellite tracking & station automation. http://www.soft-files.com/macdoppler_70032.html
MacDoppler download :Satellite tracking & station automation. http://www.soft-go.com/view/MacDoppler_69142.html
softgo (Soft-Go.com) Tue, 08 Dec 2009 17:45:47 -0000
MacDoppler download :Satellite tracking & station automation. http://www.soft-go.com/view/MacDoppler_69142.html
Northern Lights Software Associates - Nova for Windows tracks an unlimited number of satellites in real time.
Meta Description: [ Nova for Windows is an innovative real-time satellite tracking program. Nova includes realistic maps, unlimited satellites, observers, views, plus auto-tracking of antennas. ]
WXtrack - Satellite tracking and decoding software, including WXtrack, WXtrackGL, SatSignal, GeoSatSignal, and the HRPT Reader is available for download.
Meta Description: [ David Taylor's Weather Satellite programs, including signal demodulation and ground track prediction. ]
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.
Meta Description: [ AMSAT is a worldwide group of Amateur Radio Operators who share an active interest in building, launching and then communicating with each other through non-commercial Amateur Radio satellites. AMSAT designs, constructs and successfully launches communications satellites into Earth orbit. ]
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.
Meta Description: [ A PHP script to calculate look angles to satellites using the data in TLE files ]
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CubeSAT Project - Project led by students at Cuesta College to construct and operate a small amateur radio satellite.
FODtrack Satellite Tracking Interface - Construction tips to build a amateur radio satellite tracking dual-axis rotor controller using a PIC16F877 IC.
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.
Meta Description: [ Spam Filter ISP is an Anti-spam software for Windows that acts as a proxy to your existing SMTP server (MTA) and filters email based on MAPS RBL and DNS based ORBS blacklists, Bayesian statistical filtering and SPF filters. An antivirus plugin is available for anti virus support. LogSat Professio... ]
MSFC: Real-time Satellite Tracking - Two-dimensional and three-dimensional applets showing the positions of over 700 satellites. Also includes a sighting guide and public-use images of the whereabouts of several popular satellites.
N2YO Satellite tracking Interface - Web-based realtime satellite mapping tool tracking many amateur satellites.
Meta Description: [ Real time satellite tracking web application. Over 8000 satellites real time tracked. Other thousands of objects in our database ]
Orbitron - Satellite Tracking System - Shows positions of satellites at any given moment in real or simulated time. Free download (Cardware). [multi-language]
Meta Description: [ Orbitron - Satellite Tracking System written by Sebastian Stoff. Orbitron is FREE application related to satellite tracking, ISS, Iridium flares, HAM radio... ]
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 Frequency Guide - A tabular guide to amateur radio satellite frequencies.
Satellite Index Project - Graphical and real-time information on satellite locations.
Meta Description: [ Satellite Index Project ]
Satellite Tracking Prediction Form - Satellite tracking pass predictions includes by state listings, and related resources.
Meta Description: [ SatTrack Satellite Orbit Analysis and Real-time Tracking Software with GUI and Animated Graphics for UNIX and Linux Systems ]
SatScape - Windows tracking software; features include 3D maps and can track several hundred satellites simultaneously.
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 enthusiast
Meta Description: [ Weather Satellite receception specialists ]
UK Satellite Feeds - Satellite feeds, listings, and free channels across Europe.
Meta Description: [ satellite feeds and satellite frequencies free tv listings. ]
WinOrbit Home Page - Free satellite tracking software for Windows 3.x.
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