Rocket Lab delay launch of STP-27RD test satellite trio for the DoD

Rocket Lab has stood down today’s launch attempt to conduct additional payload checks. The company is preparing their Electron rocket for its second launch of 2019. In its sixth overall mission, Electron will place the SPARC-1, Falcon ODE, and Harbinger satellites into orbit, as part of the Space Test Program (STP). Launch is now scheduled for No Earlier Than May 5 at 6:00 UTC, from Rocket Lab Launch Complex 1 (LC-1) in New Zealand. More

(Source: NASASpaceFlight.com - May 4)