WXtrack - Satellite tracking
Information WXtrack em Português.
What the reviewers and users have said:
- "WXtrack is free, and is one of the best tracking
programs that I have come across" - Radio Active April 2001
- "...a satellite tracking program with a superbly crafted
tracking window..." - Remote Imaging Group Journal 58
- "...as up to date as any...", "...an impressive program..."
- Monitoring Times, August 1999
- "..the excellent "WXtrack" software .... I've used WXtrack in various outreach programs
to high schools and recommend it." - Professor Bill
Cowley, Director, Institute for Telecommunications Research, Satellite Comms Program Leader, CRC for Satellite
- "It was a pleasure to find a well-crafted package"
- MD Robotics -
makers of the Canadarm used on the Space Shuttle and Station
- "I have used your program quite a bit now and I absolutely love
it. It is the best tracking program I have ever used and I have used
them all I am sure :)" - Mark Kyle
- "WXtrack is, by far, the most economical, flexible, and
informative satellite tracking and display package available today. It
will be prominently displayed in our Data Processing Center to show the current, historical, or future location of our "A-Train" satellites and
tracking sites. Kudos to David Taylor for an exceptional satellite application"
- Don Reinke,
NASA CloudSat Mission Data Processing
- "I wrote Quiktrak and for years it was the mainstay of the amateur and in some cases professional tracking world.
After seeing WXtrack, there is no need for me to ever revisit that offering. I am happy to register this
software" - Bob McGwier, N4HY. Vice President for Engineering, AMSAT-NA
- "WXtrack is a great program - I believe to be the best
available." - Kevin Nice, Nice One Publishing Limited
WXtrack is used by many Universities and satellite enthusiasts
across the world, and is also used with the industry. If you
would like a custom version for your project, just e-mail
me. See WXtrack in Embarcadero' Delphi
registration - help support continued development!
3D display version - WXtrackGL
SGP4 component download
Multiple satellite tracking, with night-time shading.
(Click for more
WXtrack in ISS mode, simulating the NASA wall display.
(Click for more
|This program, which I have described in more detail, is designed to predict the
tracks of satellites both as paths above the earth, and as images produced by
these satellites when scanning the ground. It was designed for use during the early
stages of my weather satellite receiving activities, when clouds and interference prevented easy
identification of what I was actually observing! Read more about using WXtrack. The core orbit
prediction elements are also available as a component that you
can use in your own software. This program is free for amateur use, but if you do wish to say
"thank you", or you want technical support, or you want the
advanced facilities, you should register
WXtrack can read processed satellite images from one or more folders of
your choice, and present these images side-by-side with the ground track prediction. To
make visual correlation easier, minute markers are produced on the predicted image to
match those on NOAA APT transmissions. Because of the graphics used in this program,
it really requires a display of 1024 x 768 or better resolution, but it will work on 800 x 600.
Sample of the results
using the full 18MB ground topography database.
Trackers and Antenna Rotators
WXtrack can drive a number of popular antenna tracking systems including
controllers based on the WiSPDDE,
AMSAT's LVB tracker, EA4TX's ARSWIN, Kansas City Tracker (RR.DLL
and ON1CIM's KctTracker.exe), Las Vegas Boulevard (LVB from G6LVB), SeaTel, CX6DD (supports
Yaesu GS232), EasyComm, IF-100 and FodTrack standards. There are options for early
startup of the tracker, antenna offset, flip-mode, antenna parking at pass end,
running a command at start-of-tracking etc., and the program has a quick
point-at-object mode for setting up your antenna with the sun, moon etc.
If you have another tracker that you would like supported, why not write to me and ask?
SDR - Software Defined Radio
SDRs are supported both through the excellent HDSDR
software, and the equally good SDR#
software with the DDE add-on.
Users have asked for support on this software, and wish to say
"Thank you", so I now provide extra facilities to users who do register
WXtrack. Commercial use of WXtrack requires purchase of a
commercial licence. The extra facilities are designed to make the program
easier to use for regular users, and to extend the facilities available.
- Extra facilities include
- LARGE TEXT showing the tracker location from the other
side of the room!
- A Satellite Summary form is available by right-clicking
the World Map display - includes MA display, nearest city in addition to
azimuth, elevation range etc.
- The latitude and longitude of the mouse on the World
Map is given in, and the range and bearing from the home location.
- Display extras e.g. some ISS mode features, multiple
ground station footprint display. Here's a screen-shot
of the registered WXtrack in full ISS
- Input from GPS for location and time setting, GPS
- Extended Radar view functionality, especially for GPS
- Solar outage times for geostationary satellites
- Satellite priority setting and automatic switch to next
- Option of restricting passes tracked to those in the
- Automated daily reload of Kepler data
- Access to the Kepler
Manager registered functions
- Quick access to Sat
Batch and Kepler Manager through the Tools menu.
- The Tracker Test command is considerably enhanced by
adding offset control, manual positioning and RA/Dec tabs - ideal for tracker setup and
- The tracker parking option is available.
- You can select finer time steps for the pass details
- HRPT channel selection is possible with the Götz Romahn/Bob Barnes CX6DD tracker variant.
More information about some of
the extra facilities.
- System Requirements
- Windows: XP, Vista, and Windows-7 are supported
- Other versions may work, but are not supported
- Processor: Pentium 90 or better, 200MHz or better recommended
- Memory: 32MB or better, 64MB highly recommended.
- Display: 800 x 600 resolution or better, 15-, 16- 24- or 32-bit colour
- WXtrack works best with Normal font size.
- The runtime Library Bundle listed below is necessary for WXtrack to function. If you get error messages about missing DLLs when
you try to run WXtrack, please consult the library notes page.
- Got a question? Check out the
- There is a free self-help group that you can join at http://tech.groups.yahoo.com/group/SatSignal/,
where other users of the software can be contacted.
- The Country & State boundary data is required if you wish to
generate image overlays for adding to actual pictures with SatSignal, and for certain map
projections. If you have less than 32MB memory in your system and want to run
overlays, it may be worthwhile downloading the Pre-compiled
overlay bitmap as the program will struggle to generate the 31MB bitmap in a 24MB or
less system! Copy the expanded Overlay.bmp file to the program's executable folder.
If you wish to change grid-line spacing, add longitude and latitude annotation, or
put the grid on top of the countries, please download MakeOverlay program listed under
optional items below.
- If you have a problem with your PC being permanently set on
Daylight Saving time, which happens with certain versions of Windows
98, try the Time Zone Editor
from the Microsoft Windows
2000 Resource Kit. This program, TZEdit, enables you to define your Time
Zone details. More
- If you are driving a tracker in real-time, be sure your PC
is keeping accurate time.
||If you have customised any of the standard
files, be careful not to overwrite your customised files with ones from the
Please note that while the Kepler orbit data
supplied with the download was current at the time the download was
prepared, it will be out-of-date by the time you start to use the
program. You are responsible for ensuring that the program has
up-to-date information if you want the most accurate results.
Registered users of the program can achieve this automatically with the Kepler
Manager software, for which their WXtrack licence is also valid.
Please be careful not to overwrite your current Kepler data, or
other local customised data, with
||More information with the Tracker Status box
pop-up hint (WiSPDDE displays uplink & downlink frequencies &
modes), when user changes radio modes a 4-second delay should cause
WiSPDDE to pick up the change (an hour-glass is displayed while this
||Honour +3 orbits ground track display
request, restore Next Pass displays in manual mode, handle missing radio
modes more elegantly, correct southern hemisphere moon phase display.
||Add tracker maximum elevation limit option
(registered), in visible pass prediction, add compass direction at
"Appear" and "Disappear" times (registered), support
SDR# program via DDEtracker, restore
"Radio" tab in Tracker Options, relax tolerance for
geostationary in tracker test, grey out Save Snapshot if not registered,
replace UK miles with nmi in status hint, replace symbol for
nautical miles with "nmi" to hint at Nautical Miles
You can download these icons, which have been contributed by
WXtrack users, to show the International
Space Station and Space Shuttle (ISS and STS) on your WXtrack
display. Note that the STS, Progress and Soyuz icons will need to be renamed with the
NORAD catalogue number for each new launch. Copy the contents of
the zip file to your WXtrack directory. My thanks to those who have made
their work available to the WXtrack community. These icons may not
be used with software other than WXtrack without the specific permission of the
icon author. Here's a screen-shot of
the registered WXtrack in full ISS
David Davidson STS
& ISS icons
Screen-shot of ISS
and STS icons in use.
The docked icon is in the docked
directory in the Zip archive.
(two separate icons)
(ISS icon with docked Shuttle)
Jörg Fiegge Tiangong 1, Shuttle, Progress
& Soyuz icons
Remember to rename the icons with the NORAD catalogue number
before use (37820 = Tiangong 1). Jörg lives near the home of the first German cosmonaut.
Michel Casabonne STS,
TDRSS, ISS, and Sun icons
The orange Sun icon requires an icon editor to replace
the MAINICON in WXtrack.exe
with some of these icons in use.
Neville Roberts NOAA
weather satellite icons
Includes renovated ISS (and without the STS), Progress,
Soyuz, ATV and reversed shuttle, Hubble, and X38-B. Not all shown here.
icons in use.
Yorgos has provided updates to his icons in June 2012.
Yorgos Papadopoulos updated
If you like this software, you can rate it at the DXZone web site that
lists related programs. Rate this Software @ The
DXZone. Be sure to register
WXtrack and help support continued development.
A self-help group is available for this software at
Click to visit the SatSignal self-help group
I am very grateful to the late Ferran Alegret for providing a Spanish language
version of the help file, which may be obtained directly from his Web site, and to Jean-Louis Fenasse for the
French language help file and information. Thanks to Roger Hedin for his
additions of some lakes and island groups to the original Country & State boundary
data. George Ioannu provided the WXReceiver program for automatically scheduling reception.
David Bate suggested the MET display, and provides data updates. The orbit prediction code was derived from Dr T S Kelso's Pascal units on his CelesTrak web site. Many thanks to Dr Kelso who
very kindly gave permission for his code to be used. A component that can access the
SGP4 model based on Dr T S Kelso's code is available from this page.
Without Dr T S Kelso's code, WXtrack would not have been possible.
Click for more
|Imagine that you are flying in space,
looking down upon the Earth. All your favourite satellites are
visible, and you can fly around to your heart's desires. Oh, and it
will cost you nothing! Yes, that's WXtrackGL.
You can choose when and where, and which satellites are displayed.
You can set whether you manually control the program, or get an automated
ride on the satellite!
||Updates the program to allow it to act as a
viewer for any data presented on a world-map projection and generalises the time
steps. Make solar illumination optional, add higher-speed modes, add solar & lunar viewpoints,
allow background image choice, add persistence of selected settings.
||Improved error messages, give folder name if no Keplers found,
suggest user downloads WXtrack.
||Add support OpenGL 2.x systems.
NOAA-16 coverage from New York
Imagine if you could superimpose all the passes for a given
satellite for a week or a month ahead. You would end up with a plot
showing the coverage from your location. This simple program allows you to
do just that, and provides a text file of the results for any further processing
you wish to make. Experimental, unsupported program. Requires the SGP-4
component V3.2.0 listed below.
The screen shot to the left shows the coverage to be expected from an HRPT
station located in New York. Note the differences between north-bound
and south-bound coverage shown as red and blue lines.
||Build with Delphi 2009
Do you want to use the same prediction code as in WXtrack? Perhaps
you want to call it from Visual Basic, Visual C++, Visual C#, Java, a Web page, or even a batch file.
This component is for you! I have made available the core SGP4 model
satellite prediction routines used in WXtrack as an Active-X DLL component. This allows you to
call satellite prediction routines from any program, Web pages using ASP, or even from the
command line by using the Windows Scripting Host. Working samples are provided
showing how to obtain a list of passes with Microsoft Visual Basic, Visual C#, Visual C++, Borland's
the Windows Scripting Host and using Active Server Pages.
WXtrack, the core code is from Dr T S Kelso's Pascal implementation of the highly accurate
SGP4/SDP4 orbital model. Many thanks to Dr T S Kelso for making this code available.
||Add access to
satellite state. 2002 Apr 05 Updated Les Hamilton's VB5 demo. 2003
Jan 15 documentation update.
||Add Period function and access to Kepler data,
add MeanAnomaly to Kepler data, add MakePassDetails function. 2005 Feb 26
- updated Les Hamilton's VB5 demo. 2005 May 31 - added Nadir's C# demo.
2005 Jul 18 - updated Les Hamilton's VB5 demo to demonstrate the MakePassDetails
||2005 Jun 16 - fix memory leak with duplicate satellite names.
2005 Jul 17 - increase error-checking in MakePassDetails (where a direction other than N, n, S, s is specified,
where the satellite name is mis-spelt). 2005 Jul 17 Les Hamilton updated the VB5 demo
(V6.0 update to make use of the function 'MakePassDetails').
||2006 Sep 02 - add function MakePassDetails2 which includes the range rate.
2006 Sep 13 - add Java class and demo project from Henk Marais.
Jan 15 - update Les Hamilton's VB5 demo.
2009 Jun 07 - restore C#
2011 Mar 17 - add note about needing Administrator mode for
REGSVR32 with Windows-7.
This is exactly the same core code as used in WXtrack, but is provided
without support. Scott Hather is using a version of this DLL in the current version of his SatScape software.
Note for Windows-7 users
If you are running Windows-7, you must be in Administrator
mode to register the DLL with Windows. You can get an Administrator mode
command prompt as follows:
- Start menu, All programs, Accessories, Command prompt
- Right-click, Run as Administrator
Then navigate to the directory containing DJTSatLib.dll and
enter the command:
If you get an 0x80004005 error message, you were not in
If you have an R2FX, R2ZX, R139 or RX2 receiver, you may have wanted to control it from
your computer so that important passes were collected, and not ruined by other
satellites capturing the receiver. My PassControl program allows this
scheduling, and being RS232-based, it works under Windows XP, 2000, NT etc. as
well as Windows 98 and ME.
This program has been fully updated for the new GEO
PIC 1.0 and for Kepler data for NOAA-18 & NOAA-19.
Hardware requirements: an R2FX,
R2ZX, R139 or RX2
Receiver modified for serial
||Support GEO's R2FX (standard) and R2ZX (pager-proof)
receivers - from the GEO Shop.
||Update for proposed NOAA-18/NOAA-19
||Update for NOAA-15/NOAA-17 frequency swap.
Please note: If you are upgrading PassControl under Windows 2000, the first time you run the program you may get an error dialog box, possibly
with the message "Catastropic error". This error will go away once a valid location for the Kepler data is entered. Note that Windows 2000 is not a
Now have their own page - please click this link.