Bring your missions with you
Open STK, GMAT, CCSDS and TLE files as native missions, with satellites, ground sites and timelines intact.
The operating system for space missions
From the Sun to deep field.
Mission analysis usually lives in five tools and a spreadsheet.
Arksa keeps the whole mission on one model. Design the orbits, then answer every question they raise, from coverage and power to link budgets and the road to Mars. The sky behind this page is today's, computed live.keeps the whole mission on one model, from coverage to the road to Mars.
Pilot programme open: bring a real mission
- UTC
- --:--:--
- Sun–Earth
- — AU
- Subsolar lat
- —°
- Light time
- — s
- Web studio today
- Ask about other platforms in a briefing
FIG.Mission Commander
Plans you can trust
Ask in plain English. Approve the plan. Every decision on the record.
Every plan is checked on the mission model and approved by your operators. It runs in your workspace, and on Sovereign no mission data leaves your servers.
01The Sun · Power & eclipses
It starts with the Sun
Know how much power you have on every orbit, and when the eclipses come. Lifetime forecasts follow the solar cycle.
- Solar constant at 1 AU
- 1,361W/m²
- Sunlight's trip to Earth
- 8m 19s
- Solar activity cycle
- ~11years
- Sun vectors & eclipses
- SSO with LTAN
- Solar activity & drag
FIG.Power
Every photon accounted for.
See depth of discharge on every orbit, before it becomes a design review finding.
- Eclipse
- Every shadow, every pass
- Arrays
- Power to end of life
- Battery
- State of charge and depth of discharge
02Low Earth orbit · Constellations
Shells of light
Lay out one satellite or a whole Walker shell in minutes, and watch every one of them fly under today's Sun.
- Orbital period at 550 km
- 95.6min
- Orbital speed at 550 km
- 7.59km/s
- Orbits flown each day
- 15/day
- Orbit design wizard
- Walker shells
- Force models
- Conjunctions
FIG.Constellations
Draw a constellation like a spirograph.
Set satellites, planes and phasing, and the constellation draws itself with its crosslinks and ground tracks.
- Patterns
- Any shell you can describe
- Propagation
- Quick studies to a full force model, or TLE
FIG.Coverage & access
Watch the map heat up where you are seen.
Draw the area you care about and read revisit, gaps and response time straight off the map.
- Metrics
- Revisit · max gap · response time
- Access
- Every pass, with the terrain in the way
- Areas
- Global, band or AOI polygon
03Coverage · live
Watch coverage fill in
Twelve satellites sweep their sensor cones over the real Earth. The map heats up where the constellation looks most, and the latitude profile shows where it looks least.
- A simulated day, replayed in seconds
- Hover a latitude to find it on the map
- Computed live on this page
Validated: sensor footprints against the published geometry →
03Relay · Networks
Laser relay
Close every link from transmitter to margin, and watch the network re-route as the geometry changes.
- Geostationary altitude
- 35,786km
- Ground–GEO–ground light time
- 0.24s
- Horizon limit seen from GEO
- ±81° lat
- Link budgets
- Crosslinks
- Optical & RF
- Latency
FIG.Link budget
A waterfall that ends in a margin.
Read the whole budget at a glance and see the margin move with the weather you design for.
- Weather
- Rain and atmosphere on every pass
- Answer
- The margin, before you commit
- This chart
- Eb/N0 and margin, live
Validated: the ITU-R rain model against its published tables →
04Cislunar · Lagrange points
Around the Moon
Plan lunar relays and halo orbits, with line of sight to the south pole and back to Earth. The Moon sits where it is today.
- Mean Earth–Moon distance
- 384,400km
- One-way light time
- 1.28s
- NRHO period, 9:2 family
- ~6.5days
- Halo & NRHO
- L1–L5
- Lunar relays
05Interplanetary · Mars
The long arc
Find the cheapest launch window and the Δv for every burn before the programme commits.
- Minimum-energy trip, Earth to Mars
- ~259days
- One-way light time
- 3–22min
- Between launch windows
- 26months
- Transfer windows
- Porkchop plots
- Burns & targeting
FIG.Interplanetary
Pick a launch date off a porkchop.
Pick a departure date and flight time off the plot. This one is solved live on this page each time it loads.
- Engine
- Computed live on this page
- Answer
- The cheapest window, and when it opens
- This plot
- Computing…
06Deep space
Past Jupiter
Move data across the solar system, even when the links drop for hours.
- Jupiter's orbit
- 5.2AU
- Earth–Jupiter light time
- 33–53min
- Sun–Neptune light time
- 4.2h
- Networks that survive outages
- Light time
- Ephemerides
Planet positions are today's, from JPL data. Distances are compressed logarithmically; planets are drawn at their true size ratios, the Sun at one seventh of its true relative size.
07Compute in orbit
Power, heat and compute
Size a compute platform in orbit: power, heat and downlink in one study.
- Radiated per side at 300 K
- ~460W/m²
- Longest eclipse at 550 km
- ~36min
- Radiator for 100 kW at 300 K
- ~242m²
- Sizing
- Thermal radiators
- Downlink
✓Seven chapters, one engine
Every scene is computed
The Sun, the planets and the sky on this page come from real data and move live on this page. Each chapter is a module of the studio, open to invited teams.
- Sun and planets placed from JPL data
- Stars from the Hipparcos catalogue
- Earth from NASA imagery, lit by today's Sun
Validated: planet positions against JPL reference ephemerides →
6Capability areas
The whole engine
Six areas on one engine. Pick the one you are working on.
I/OImport · export · automation
Bring your sky
Open the scenarios, ephemerides and element sets you already have, and hand results to the tools downstream.
Reads and writes the formats your team already uses: STK, GMAT, CCSDS, TLE and OMM, CZML, KML and CSV.
API on request
API access for pilot and Mission teams, on request.
Share links and templates
Send a link that opens a view exactly as you left it, or start a new mission from a template.
OSPlatforms & privacy
Your mission, your rules
Web studio today. Ask about other platforms in a briefing. Sovereign is built to run on your own servers; deployments are scoped with each customer.
- Web studioToday, by invitation
- Your own serversSovereign, scoped with each customer
Privacy · Sovereign
Your mission stays yours.
- Your own servers on SovereignThe platform, the engine and your data run on your own servers.
- Nothing of the missionOnly licence, reference-data and update checks reach Arksa.
- Your keys, your serversSovereign keeps mission data inside your perimeter.
- Signed licence filesSovereign licences verify on site.
✓Validation
Shown working
✓
Each result reproduces its published reference, on every change.
- TLE tracks match the reference set.
Every state of the published verification set is reproduced, on every change.
Result · matches the reference - Low orbit to GEO matches the textbook.
The textbook two-burn transfer, with its time of flight.
Result · matches the reference - Collision risk matches the reference.
Probability of collision matches the published reference case.
Result · matches the reference - A real Mars launch, reproduced.
The porkchop this page draws gives the launch energy the Mars Reconnaissance Orbiter flew.
Result · 16.4 km²/s² flown
✓In the studio
What teams do in Arksa
A few of the outcomes teams reach in the studio.
- CoverageWatch revisit and gaps build up on the globeCoverage fills in on the 3D Earth as the constellation flies, linked to the map and the charts.
- VisualsShow reviewers a photoreal EarthPut the mission on a photoreal globe, lit by the real Sun, with clouds, night lights and the atmosphere.
- Space trafficScreen every tracked object, then plan the way outCheck the fleet against the whole public catalogue, and plan re-entry and disposal against the rules.
@Be first to know
Invitations, before anyone else
Preview access and private briefings. We write only when there is something to invite you to.
One step left.Email my sign-upNothing has been sent from this page. The email you send is the sign-up.
Under NDA
Bring your hardest question. We show it on your mission in a briefing.
Under NDA, with the founder who builds Arksa.
Request a briefing$Pricing
Choose your orbit
Early access
Plans and prices.Arksa is by invitation. Request access, or join the pilot and fly a real mission with us.
Pro
For solo engineers and small startups.
$249a month
Billed monthly
- 1 seat, the full studio
- Every analysis module
Team Minimum 3 seats
For startups and small operators.
$599per seat
a month
a month
Billed monthly · from $1,797 a month
- Everything in Pro
- Collaboration, roles and share links
- API access on request
- Priority support
Mission
For operators and prime contractors.
from$60ka year
Annual contract · 10 seats included
- Everything in Team
- Audit log
- Priority support
Sovereign
For Operators and Agencies needing extra assurance.
Contact us
Annual contracts from six figures, scoped per deployment.
- Built to run on your own servers; scoped with each customer
- 10 seats, signed licence files
- Your mission data never leaves your servers
- On-site support by agreement
Prices in US dollars, exclusive of taxes. Yearly billing brings Pro to $199 a month and Team to $499 per seat a month. Mission is an annual contract from $60,000 a year. Sovereign: contact us; annual contracts from six figures, scoped per deployment. Sovereign: your mission data never leaves your servers.
?Questions
Before you start
Arksa needs a connection to its server. During early access that is the web studio, by invitation. Sovereign is built to run on your own servers, so your mission data never leaves them; only licence, reference-data and update checks reach Arksa. Air-gapped deployment is by arrangement.
Orbit and constellation design, access, coverage, power, link budgets, conjunctions, transfers, networks and trade studies. The capabilities page has the six areas.
Arksa reads and writes the formats your team already uses, from STK, GMAT and CCSDS to TLE, CZML, KML and CSV, so scenarios built elsewhere open with their satellites, ground sites and timelines.
Pro is $249 a month, or $199 a month billed yearly. Team is $599 per seat a month, or $499 billed yearly, from three seats up to 250. Mission is an annual contract from $60,000 a year with ten seats, and Sovereign is by quote: annual contracts from six figures, scoped per deployment. Universities and research institutes can partner with us.
During early access, plans are not billed. Pilots are agreed separately.
Mission Commander works inside your workspace; every plan waits for an operator\'s approval.
The engine is checked against published references on every change, and nothing reaches you unless the checks pass: 350+ validation cases, all passing. See the validation results.
A mission designed in
ARKSA
- The Sun
- Power · eclipses
- Orbits
- Design · constellations
- Coverage & access
- Revisit · gaps
- Links
- Budgets · weather
- Conjunctions
- Close approaches · risk
- Networks
- Crosslinks · ground
- Lifetime
- Burns · disposal
- Interplanetary
- Transfers · windows
- Operations
- Plans · watch
- Compute in orbit
- Power · heat · cost
Sunrise over the limb, from the night side of Earth
Your mission starts here
Request access, or book a demo on your own mission.