The WSPRlite is a special test transmitter that sends a signal to a worldwide network of receiving stations.

When used with the web-based DXplorer system, it's a powerful new way to evaluate antenna performance.

Going way beyond antenna modelling or antenna analyzers, this unique system allows you to see how your antenna is performing in its actual location and in real-time! This type of analysis has never been possible before.

Edmund - M0MNG - gives a first impressions unscripted review of it.

The transmitter is currently operated on the 20m band (14.0956 MHz) with 200mW output into my shortwave OptiBeam.

The repeate rate is 50%, i.e. it transmits randomly 15 2-minute cycles every hour with a cw id.

The DXplorer shows the receiving stations

in the spots table:

or in the spots map:

The spots can also be found in the WSPRnet database: