Last month we posted about monitoring and logging military ADS-B data on milaircomms.com. It turns out that there is another service at www.live-military-mode-s.eu that also does military ADS-B logging. One user of live-military-mode-s.eu has recently uploaded a tutorial showing how to use a RTL-SDR to contribute to their logs. By contributing to their service you get a username and password to access members only sections of their site.
Contribution involves running an ADS-B decoder like RTL1090, sending the decoded data to Virtual Radar Server (VRS) and then using VRS to rebroadcast the data to their Mode-S Logger software.