The idea
Know the date — not just the status.
What it is
Twin + horizon + thresholds
Systems · Ephemeris
See the breach before the date.
Ephemeris is predictive compliance intelligence: every satellite as a living twin, obligations projected forward in time — so you act on a calendar, not a surprise.
Not a score
Dated risk
When a threshold fails — not a 0–100 vanity number.
Not a snapshot
Trajectory
Where the twin is heading under physics and ops reality.
Not a silo
Fleet + regime
Assets and obligations in one continuous map.
Feel it
Scrub the horizon. Watch the threshold approach.
Drag the timeline. An illustrative reserve curve crosses a planning threshold — the same mental model Ephemeris applies to real twins: a date you can work against.
Illustrative scenario
Propellant reserve · single spacecraft · 5-year horizon
Not live fleet data
Readout
- Horizon position
- Day 180· 0.5y
- Reserve (model)
- 46.6%
- Days to threshold
- 353
Still above threshold — time left to plan burns, insurance, or authorization updates before the crossing date.
The system
Four instruments. One horizon.
Twin
Per satellite
Orbital state and operational parameters as a continuous object — not a spreadsheet row.
Horizon
Up to 5 years
Project reserve, decay, and calendar obligations far enough to plan, not just report.
Physics
Orbit-aware
Atmospheric drag and space-weather context where lifetime and disposal windows matter.
Map
Multi-regime
National rules, NIS2 themes, debris guidelines — plus preparation for proposed EU layers.
Capabilities
What Ephemeris can do.
Built for operators who need a dated path to action — counsel, ops, and leadership reading the same horizon.
01
Digital twin
Each satellite modeled from catalog orbital elements and operator context — a single object the rest of the system reasons over.
02
Compliance forecasting
Project when a threshold is first crossed: reserve floors, disposal timelines, certification windows — dated, not scored.
03
Orbital decay
Altitude and lifetime trajectories that respect atmospheric drag and solar-flux context for LEO disposal planning.
04
Fleet intelligence
See the constellation as a system: which asset is the weakest link, and when the first fleet-level problem lands.
05
Space weather context
Geomagnetic and solar activity as inputs to decay and operations planning — not a separate weather widget.
06
What-if paths
Stress a burn plan or delayed service: how does the crossing date move before you commit the ops change.
Inputs
Grounded in public catalogs and your ops context.
Catalog feeds and weather indices set the physics backdrop; operator telemetry and mission context (where available via Sentinel and your workspace) parameterize the twin.
CelesTrak
TLE / orbital element refreshes for catalog objects
ESA DISCOS
European catalog context for objects & debris
NOAA SWPC
Solar flux and geomagnetic indices for decay context
Regulatory map
Threshold themes from national, NIS2, and proposed EU rules
The shift
Old question
“Are we compliant today?”
Ephemeris question
“When is the first breach — and for which obligation?”
Next
Put a horizon on your fleet.
Book a consult to walk a sample twin, or start with a free obligation map for your operating profile.
General product information — not legal advice. Forecast demos on this page are illustrative. EU Space Act references describe the Commission proposal (COM(2025) 335), still in co-legislation as of 2026.