Testing HF antennas is a tricky thing to do. Simple on-air test are
seldom conclusive and are more often than not, they are just plain
confusing. SOTABEAMS has come up with a completely new way to test
antennas, locations and to monitor propagation using the WSPR system.

SOTABEAMS system consists of two parts; WSPRlite a WSPR beacon with
electronic power control and DXplorer.net a data analysis website.

WSPRlite sends a test transmission which is…

A new way to compare HF antennas
Source: QRZ News
Link: A new way to compare HF antennas