On Saturday, June 27th, many of the world’s large parabolic antennas (sometimes called dishes) will stop their normal space work and swing around to track the moon when it rises. EOA volunteers will then use the EME or Moon Bounce transmissions to link up with other dishes worldwide via the moon. Signals are literally being bounced off the moon’s surface and back to other stations on earth where they are received some 2.5 seconds later.
There has never been so many dishes pointed at the moon since the lunar landings and possibly this will even break that record.
More info: