LOS ANGELES, May 6 (Xinhua) -- Boeing's Starliner spacecraft is powered on for first crewed mission to the International Space Station (ISS) scheduled later Monday.

The spacecraft, named Calypso, is planned to launch at 10:34 p.m. Eastern Time Monday on a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida.

The flight test will carry NASA astronauts Butch Wilmore and Suni Williams to ISS for about a week to test the Starliner spacecraft and its subsystems before NASA certifies the transportation system for rotational missions to the orbiting laboratory for the agency's Commercial Crew Program.

The spacecraft was powered on on Sunday and will remain powered on until it enters quiescent mode at the space station, according to Boeing. Both the Starliner and Atlas V are stacked at the launch pad.

Starliner is scheduled to dock to the forward-facing port of the space station's Harmony module on Wednesday, May 8.