Join Donate

Jason DavisMay 19, 2015

Timeline: LightSail's First Day in Space

It’s the day before launch here at Cape Canaveral Air Force Station, where The Planetary Society’s LightSail spacecraft is scheduled to take a stroll to the pad at Space Launch Complex 41. Inside United Launch Alliance's Vertical Integration Facility, an Atlas V rocket has spent the past couple weeks safely sheltered, after technicians installed its primary payload, the U.S. Air Force's X-37B space plane. 

Visit our LightSail Mission Control Center

For all the latest LightSail updates, including a live launch video feed courtesy of United Launch Alliance, visit our Mission Control Center at

The AFSPC-5 mission's next milestone, a slow roll to the launch pad, will expose the Atlas V to the elements for the first time. LightSail and its nine CubeSat brethren remain encased beneath the rocket's interstage adapter, which protects part of the Centaur upper stage until first stage separation.

We’re now able to release a timeline of events for LightSail’s first day in space. The below chart assumes a liftoff of 10:45 a.m. EDT, at the start of the four-hour launch period. The actual window has not yet been released.

Please accept marketing-cookies to watch this video.

We aren't sure when we'll hear from LightSail, but the first possible opportunity comes three hours, 14 minutes after liftoff. If you’re a member of the amateur radio community, you can help! Email me any data you collect from LightSail, including screenshots of the radio signal if you have them. I'll pass the information on to our engineering team, and we'll recognize your contribution on our blog.

Frequency: 437.435 MHz

Protocol: AX.25

Encoding: FSK

Baud: 9600 bps

LightSail's automated telemetry chirps start after antenna deployment and continue throughout the mission. We’ll update our Mission Control Center to show the spacecraft’s current position, including pass predictions for your device’s current location (courtesy of 

Atlas V Vertical Integration Facility

Jason Davis / The Planetary Society

Atlas V Vertical Integration Facility
United Launch Alliance's Vertical Integration Facility houses the Atlas V rocket carrying the Air Force's AFPSC-5 payload, as well as LightSail. The rocket will roll the launch pad, which is surrounded by four lightning masts, tomorrow morning.

Read more: mission status, LightSail

You are here:
Jason Davis thumbnail
Jason Davis

Editorial Director for The Planetary Society
Read more articles by Jason Davis

Comments & Sharing
Bill Nye and people
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

LightSail 2

LightSail 2 launched aboard the SpaceX Falcon Heavy. Be part of this epic point in space exploration history!


"We're changing the world. Are you in?"
- CEO Bill Nye

Sign Up for Email Updates