April 20 launch slate spans GPS, JAXA, Starlink, and ISS cargo missions

NASASpaceflight's weekly manifest preview tracks seven missions across four countries and five launch vehicles during the week of April 20.

The slate mixes national-security navigation, JAXA technology demos, Rocket Lab launches from both hemispheres, SpaceX Starlink deployments, South Korea's ADD orbital attempt, and a Russian Progress cargo run.

The weekly spread matters because it is not just another Starlink-heavy cadence snapshot. It includes government navigation, civil-space demos, defense-adjacent launch activity, broadband replenishment, and station logistics in the same manifest window.

The preview also gives readers a clean way to separate individual mission updates from the broader launch-market picture: multiple providers, multiple countries, and several mission classes are all competing for range, vehicle, and customer attention in one week.