Data Sync — Bring Your Frames Home

Your rig captures all night, and every frame lands on the rig’s own disk. The ARIS Shuttle brings the night home: a small companion app for macOS and Windows that pulls completed frames from your rigs to a folder you choose on your own computer — checked, organized, and ready for processing.

It completes the picture of where your data lives: Files browses the rig’s disk, and Data Sync puts the archive on the computer where you actually process.

Get the Shuttle

The Shuttle ships as a signed installer for macOS and for Windows. Sign in to the ARIS app at app.arisastro.com and download the installer for your platform from there.

First run

Setup is a two-step wizard:

Pick a destination folder. Any folder you like — a folder in your home directory, an external drive, or a NAS path. This is where everything lands, and it is entirely your choice.
Choose your rigs. Pick which of your rigs this computer should sync from.

That’s it. From then on the Shuttle pulls new completed frames from those rigs whenever they are reachable, and the folder stays current.

What lands on disk

The Shuttle only ever pulls completed frames — a sub still being written on the rig is never touched, so you can sync during a live session without fear of half-files.

Frames arrive organized by target and session night:

<destination folder>/
└── <Target>/
    └── SESSION-<night>/
        ├── lights/
        ├── darks/
        ├── flats/
        └── masters/

Transfers are built to be boring in the best way:

Checked. After each transfer, a frame’s pixels are compared with the fingerprint the rig recorded for it. A copy damaged on the way is downloaded again, not saved. Previews, live stacks and other files the rig does not fingerprint are checked by size.
Resumable. A closed laptop lid or a Wi-Fi drop is a pause, not a failure; sync picks up where it left off.
Idempotent. Run it as often as you like — frames that already made it over are never re-downloaded or duplicated.
Never overwrites. Two rigs can give a file the same name, such as two live stacks with one filter on one night. The second file is saved beside the first with its rig’s name added, for example Live_Luminance_20261003_stack_0001subs (ARIS Jetson).fits. A file already in the folder is never replaced.

More than one computer

Each computer running the Shuttle keeps its own independent sync cursor per rig. Your desktop can hold the full archive while your laptop pulls the same rigs on its own schedule — neither affects the other, and the rig doesn’t care how many computers are syncing.

Controls

Pause per rig. Pause syncing rig by rig, not all-or-nothing — hold off on one rig while the others keep flowing.
Filter by project. A per-rig project filter limits sync to the projects you choose, so a laptop with a small disk can follow just the current target while the desktop archives everything.

Remote sync (early access)

Away from the rig’s network, the Shuttle can sync over the rig’s secure tunnel — the same outbound-only connection that powers remote access. Remote sync is in early access:

Masters only. Remote pulls fetch the finished deep-stack masters and their preview JPEGs rather than every sub — the files worth having immediately, at sizes the internet handles gracefully.
Subs come home on the LAN. The Shuttle has no setting yet that pulls every sub over the tunnel; the full archive syncs when the computer is next on the rig’s network.
Authorized by you. Remote sync uses a token minted from your signed-in ARIS session, so only your account’s Shuttle can reach your rigs.

On your home LAN none of this applies — sync runs direct and full over the local network.

Hand off to processing

The destination folder is the hand-off point: point Siril or PixInsight at a session folder and the lights, darks, and flats are already grouped, with the night’s masters alongside in masters/. No export step, no re-sorting — the folder the Shuttle maintains is the folder you process from.