The Artemis I mission occurred 50 years after Apollo 17. What will it take to not have this happen again?
The Artemis I mission occurred 50 years after Apollo 17. What will it take to not have this happen again?
Another round of travel journals for a visit to the beautiful Cotswold region of England.
Santa Claus. Father Christmas. Kris Kringle. St. Nicholas. Papa Noel. Me.
“13 Minutes to the Moon” – an excellent BBC podcast focusing on the behind-the-scenes heroes of Apollo 11 and Apollo 13.






The space exploration advocacy website of Roger Balettie, former Flight Dynamics Officer in NASA’s Space Shuttle Mission Control Center.
Select a menu tab to the left for detailed links or one of the main sections below:
The Flight Dynamics Officer (FDO, pronounced “fido”) is a Flight Controller in the Mission Control Center responsible for the overall trajectory, or flight path, of the Space Shuttle and all related payloads or other space-bound vehicles associated with the Shuttle.
"Houston… Tranquility Base here. The Eagle has landed."
Since 1965, the Mission Control Center (MCC) has been the nerve center for America’s manned space program.
Space- and NASA-based blog entries.
The Artemis I mission occurred 50 years after Apollo 17. What will it take to not have this happen again?
“13 Minutes to the Moon” – an excellent BBC podcast focusing on the behind-the-scenes heroes of Apollo 11 and Apollo 13.
It’s been 40 years since the launch of STS-1, and the excitement of that day never faded.
Since 2011 and the end of the Shuttle Program, the FDO, a mainstay in the US Manned Space Program since the Mercury Program, has been retired. Trajectory monitoring for the International Space Station (ISS) Program is done in a much more automated and far less dynamic manner, negating the need for the FDO position of an active earth-launched spacecraft. In addition, the computational capabilities have become more distributed and the actual displays are far different than these.
HOWEVER – in the spirit of capturing memories from the Space Shutttle era, this is an exclusive “over-the-shoulder” view of what the Flight Dynamics Officer looks at in the Mission Control Center during Space Shuttle missions!
If you have any questions about anything presented here, feel free to contact me.

A Space Shuttle ascent has been called “the most exciting 8.5 minutes ever”. Take a look at what the FDO is watching during this dynamic phase of the flight – both nominal ascent and planning/executing any of the various Ascent Aborts.

Once the Shuttle is on-orbit, the FDO’s job is only beginning! From precise trajectory determination to detailed maneuver planning to rendezvous and deploy operations, the FDO is busy keeping an eye on “all things trajectory”.

Entry operations take the Shuttle from 17,500 MPH to a dead-stop on a runway half-a-world-away in about an hour. See what the FDO is doing during both the planning of the deorbit burn and the monitoring of the atmospheric flight!