According to Scientific American, six tiny “Sprite” satellites, each consisting of a 4-gram circuit board but packed with electronics, were deployed in late June. The Sprites are the brainchild of Zac Manchester, KD2BHC, whom Scientific American interviewed for the article.
The Sprites went into low-Earth orbit as secondary payloads on the Latvian Venta and Italian Max Valier satellites, launched from India. Signals on 437.325 MHz from at least one of the exterior-mounted Sprites have been received in California and New York.
Manchester launched 104 Sprites into orbit in 2014 aboard KickSat-1, but they failed to deploy.