Varaha Constellation Designer
Every number,
traceable to source.
Synthesis, propagation, coverage and RF link budgets in one auditable environment — every run records an audit trail of the exact forces and models that produced it, and states its accuracy bounds.
The workflow
One environment, from requirement to orbit
Varaha carries the whole chain on a single timeline. Change an orbit and coverage, link margin and cost update with it — one continuous model from requirement to orbit.
Synthesize
State the ground sites, latency and continuity you need. Varaha solves the inverse problem and recommends a verified Walker shell — or generate Delta / Star by hand.
Propagate
Choose fidelity per run: two-body, J2, SGP4/SDP4, full numerical Cowell with drag and SRP, or table-driven ephemeris interpolation.
Analyze coverage
Grid coverage, N-fold redundancy, revisit statistics and gaps — with real conical and pushbroom sensor footprints for results you can act on.
Close the link
Full ITU-R atmosphere: gas, cloud, rain and scintillation raise the noise floor. Availability ladders, site diversity and real antenna patterns included.
Visualize & export
Stream a live CesiumJS globe, or export CZML, GeoJSON, CCSDS OEM, SP3 and CSV for the rest of your toolchain.
Capabilities
A complete constellation engineering stack
Eight modules across five solution areas, on one deterministic engine. Every candidate a study surfaces is validated against the same models used to defend it.
Orbital propagation
Five models on one truth: two-body, secular J2, SGP4/SDP4, numerical Cowell (J2/J3/J4, drag, SRP, luni-solar) via Dormand-Prince 5(4), and ephemeris interpolation.
Coverage & revisit
Global and regional grids, minimum-elevation masks, N-fold coverage, revisit time, gap analysis, and conical and rectangular pushbroom footprints.
RF link budgets
ITU-R P-series atmosphere, availability to 99.99%, site-diversity gain, and parabolic, Gaussian and phased-array antenna patterns.
Attitude, gimbals & sensors
Quaternion attitude (nadir, inertial, target-track), body-fixed or two-axis az/el gimbals with mechanical limits, and generalized sensors.
Design synthesis & trade space
Requirements-to-constellation synthesis, parameter sweeps, and Pareto fronts of coverage against cost — each candidate verified against the real engines.
Economics & NPV
Parametric cost model — development, build with spares, launch packing, operations — run to net present value against a revenue stream.
Resilience & replan
Bathtub reliability, seeded Monte-Carlo degradation, N-k tolerance, and ranked recovery plans with time-to-restore, delta-v and revenue at risk.
Living constellation twin
Know which flown satellite fills which design slot — and which slots sit empty. Reconciles the as-flown catalog (TLEs or operator ephemerides) to as-designed slots by minimum-cost assignment, with per-member drift.
Formats & interoperability
CZML, GeoJSON, CCSDS OEM and OMM, SP3, NORAD TLE, JSON and CSV — so results drop straight into the toolchain the rest of your program already runs.
Why Varaha
Every number holds up under scrutiny.
A constellation commits capital, spectrum and years to a set of figures. Varaha makes every one of them traceable to a published reference, reproducible on demand, and validated up front — so the design stands the day you present it and the day it is audited.
Full traceability
Every result carries an audit trail of the exact forces, models and assumptions that produced it, each referenced to a published source — Vallado, Montenbruck & Gill, Battin and the ITU-R P-series — with its accuracy bounds stated explicitly.
Deterministic and reproducible
Runs are order-preserving and stochastic studies are seeded. Two teams on two machines reproduce identical results, so a study is reviewable, comparable and repeatable months after the work is done.
Standards-native
Outputs conform to CCSDS, SP3, NORAD and ITU-R by specification, and the system itself enforces units and reference frames — so results integrate cleanly and hold up under review.
Three ways in, one engine
Scriptable from the first command
The same engine behind a command-line interface, an embeddable library, an HTTP API and a live 3D globe. The CLI ships as varaha-space — prototype at the command line, integrate into a pipeline, or share a live scenario with a stakeholder.
CLI
varaha-space: constellation, design, simulate, coverage, link, eclipse, platform-access — scriptable from the first command.
Library
Embed the engine directly in your own tooling and data pipelines. The computational core is decoupled from the interface.
API
Every capability as a JSON endpoint over HTTP (Axum), with OpenTelemetry built in.
Web
A CesiumJS 3D globe with play, pause, speed and time-scrub, skyplots, coverage heatmaps and link dashboards.
# generate a Walker Delta shell varaha-space constellation walker \ --planes 6 --sats-per-plane 10 \ --altitude-km 550 --inclination-deg 53 \ --fov-deg 45 --output demo.json # propagate with the numerical integrator varaha-space simulate --constellation demo.json \ --model numerical --gravity j4 --drag-cdam 0.012 \ --duration-hours 6 --czml demo.czml # close a Ka-band link in rain varaha-space link --frequency-ghz 27 \ --station madrid,40.4,-3.7,0.6 --availability 99.9
Deployment
Run it your way.
The same suite, delivered to fit your team — self-hosted in your own environment, hosted and managed by Varaha, or on-premise for programs with assurance needs.
Self-hosted
- Full engine, CLI and web UI
- All propagation, coverage and export
- Standard support
Hosted
- Everything self-hosted, managed and updated
- Design synthesis, trade space and economics
- Shared scenarios and team workspaces
- Priority support and onboarding
On-premise
- On-premise or air-gapped deployment
- Resilience, replan and living twin
- Model validation and custom integrations
- Dedicated engineering and SLA
varaha.space
Decision-grade engineering, end to end
Run it self-hosted, hosted, or on-premise — we will match you to the right deployment for your team.
Varaha Constellation Designer is a design and analysis platform with documented accuracy limits, built for mission design, trade studies and constellation engineering.