#arow

Trajectory data from the Orion spacecraft’s first mission around the Moon will be available to the public through NASA’s Artemis Real-time Orbit Website, also known as AROW. AROW, available on NASA’s website and on the @NASA_Orion Twitter account, allows almost anyone with internet access to track Orion’s flight as it happens.

Orion will travel to the Moon and 40,000 miles beyond on Artemis I, its first integrated flight test with the Space Launch System (SLS) rocket. Users can download trajectory data from the flight, called an ephemeris, from the AROW web page.

The ephemeris data can be used to track Orion with your own spaceflight software application or telescope. It can also be used to create a physics model, animation, visualization, tracking application, or other conceivable projects.

This data is generated by the Flight Dynamics Operations (FDO) group in the Mission Control Center at NASA’s Johnson Space Center in Houston. FDO is responsible for trajectory operations of Orion, keeping track of where the spacecraft is and where it is going to be. FDO uses tracking data from the Deep Space Network and predictive models to constantly update Orion’s predicted trajectory, so the Artemis flight control team has the best trajectory estimate possible. An accurate trajectory is essential for achieving mission objectives, maintaining communications links, lighting, adjusting the trajectory, and more.

Links at the bottom of the AROW web article will have the most current posted ephemeris. The ephemeris is in the Consultive Committee for Space Data Systems (CCSDS) Orbital Ephemeris Message (OEM) standard — a text file containing a header, metadata, explanatory information, and ephemeris data, available in the .txt file format.

After the OEM header, Orion state vectors — data describing exactly where Orion is located in space, and how it is moving — in the Mean of J2000 (J2K) reference frame are listed at four-minute intervals until entry interface at the end of mission.  During trajectory maneuvers, the state vectors are reported in two-second intervals. Each state vector lists the time in Coordinated Universal Time (UTC); position X, Y, and Z in km; and velocity X, Y, and Z in km/s.

OEMs will be publicly available after Orion separates from the SLS rocket’s interim cryogenic propulsion stage that will give the spacecraft the big in-space push needed to fly beyond the Moon. Entry data will also be available for Orion’s return to Earth.

Follow @NASA_Orion on Twitter for AROW mission updates during Artemis I. Through Artemis missions, NASA will land the first woman and the first person of color on the surface of the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.

Track Orion during Artemis I at:

https://www.nasa.gov/specials/trackartemis/

View the latest ephemeris at:

https://www.nasa.gov/feature/track-nasa-s-artemis-i-mission-in-real-time

 Erika Peters

Happy Weapons Wednesday all!!

I've had a couple questions about my gear lately so I thought I'd share a photo of my collection.

It's taken me seven or so years to gather what I have, and I've been lucky that some of them have been gifted to me.

Here's hoping it will grow in numbers in the future, because let's be honest, no one just has one sword. You either have none or you have a ton. Lol

I, actually, don’t know what to think or what I feel. I think is very simillar to how I felt when Harry Potter ended. I knew it was gonna happen, I just didn’t want to. I know is kind of weird, specially if yout hink that we have all the videos, scenes, interviews on youtube, so we can watched whenever we want, but is still very sad.

I know that the cast will probbly appear in other shows. They will probably try to get a Future Star City spinoff (It’s kind of a reliff), but it’s still a bittersweet.

I know the actors will find jobs pretty quicly. Knowing Berlanti, he will probably offer jobs in his future projects, wich is great, but it will take some time to adjust to not having Felicity, Oliver, Dig, every week in my house. It like a blank space.

I know I wont forget the show. OTH, TO, TVD, VM fandoms are out there showing that there are always life after a shows end, but it’s still sad.