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QZSS+GPS SkyPlot:QZ-radar

OutlineKnow where the satellites are

The QZSS + GPS sky plot application "QZ-radar" tells you which direction the QZSS and GPS satellites will be seen at a certain time from a certain place on earth.

A common application one can think of, utilizing the GPS, would probably be something that tells you where you are on a map or something.

And usually, when you're using that sort of application, you don't really care where the satellites are. (You don't even need to know it.)

But knowing where the satellites are, will broaden your world. More than just knowing where YOU are.

Visual & Ability"QZ-radar" more than just fun

"QZ-radar" is a Windows based application (now, ver 1.30) that fulfills the satisfaction for not only engineers, but for "normal" users.

For Specialists

"QZ-radar" can give azimuth angles,elevation angles, Doppler frequencies for each satellites, and also horizontal and vertical DOPs for arbitrary time and position.(*revised:2011/02/07)

Use as a Simulation Tool

"QZ-radar" can give you an idea of how the masking of buildings and woods might affect the number of visible satellites and DOP.(*revised:2011/02/07)

Rich Interfaces

You can use the time slider to see the profiles of the satellites in motion.

You can use an Almanac of your choice.

Connecting Online

No more renewing the Almanac each time!

Just use the "QZ-Vision" APIs.

A great Visualizing Tool

Know the trajectory of the QZSS!

See how many satellites there are in the sky!

"QZ-radar" is an awesome tool with cool graphics that is more than engineer's sky plot.

It is our wish that this "QZ-radar" will give kids and non-engineers chances to feel how interesting satellite positionings are.

Just download it to your PC and enjoy.

Experience the delight of engineers.

ManualEasy-To-Use Manual

Start Up

The application will start by clicking QZ-radar.exe

It uses an Almanac file of your choice to calculate the satellite position.


Set the time and place on earth, and the satellites' azimuth and elevation angles will be shown.

Use the time slider and buttons to activate each feature.(*revised:2011/02/07)

For more Information

Please consult the HELP file in the application for more information.

Sky PlotQZ-radar Download

QZ-radar Download


QZ-radarSystem Requirements

  • Windows NT
  • Windows XP
  • Windows Vista
  • Windows 7

QZ-radarRelease Notes

Last Version

ver 1.30

  • 2012-06-27 ver1.30 Default setting amendment for Windows7 envirionment, etc. Manuals revised.
  • 2011-12-15 ver1.20 Corresponding to health bits as in the IS-QZSS.
  • 2011-06-06 ver1.10 Bug fix in preset observer's latitude and longitude.
  • 2011-02-07 manuals revised.
  • 2010-09-20 ver1.00 Released.
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