Why can't we just use freely shared WMO data instead of building our own satellites?

WMO data-sharing under Resolution 40 is voluntary, not contractually enforceable. During a geopolitical incident or when a major provider faces a satellite anomaly, that data stream can slow or stop with zero notice. A sovereign constellation transforms your nation from a passive data consumer to an active contributor — and ensures your forecasters have first access when lives are on the line.

What orbit and instrument type gives the best return for cyclone track forecasting?

A LEO constellation in sun-synchronous orbits at 500–600 km altitude carrying microwave sounders (18–183 GHz channels) provides the vertical temperature and humidity profiles that NWP models most need. Complementing these with GNSS radio-occultation payloads — achievable on 6U–12U cubesats — dramatically improves data density over data-sparse ocean regions where cyclones intensify. GEO imagery is useful for visible/IR tracking but cannot penetrate cloud to measure the storm's interior structure.

How many satellites does a nation actually need to make a meaningful difference?

Even a 3-satellite LEO microwave-sounder constellation roughly halves the revisit gap over a regional ocean basin compared to relying on opportunistic overpasses from foreign assets. Six to eight satellites can approach 90-minute revisit globally. For a small island developing state, three to four satellites focused on a defined regional domain represent a proportionate, buildable sovereign capability.

Can we purchase track forecasting as a managed service instead?

Commercial services from vendors such as Spire, The Weather Company, and regional NWP centres do offer forecast products. The problem is contractual priority: commercial SLAs guarantee data delivery under normal conditions, not during the simultaneous multi-basin events when demand peaks. Owning the sensor means your emergency management agency tasks the satellite — not a help-desk queue.

What is the regulatory pathway for operating a microwave sounder in the protected 50–60 GHz band?

The ITU-R SA.514 series protects passive microwave sensing bands from harmful interference, but securing a national frequency assignment still requires filing with the ITU Radio Regulations Board under Article 9 coordination procedures and obtaining domestic licensing through your national telecommunications authority. This process typically takes 18–36 months and should begin in parallel with satellite procurement, not after.

How does sovereign track-forecasting data integrate with existing national meteorological agency workflows?

Most national meteorological and hydrological services (NMHSs) run ECMWF, GFS, or regional models that ingest data via WMO GTS in BUFR format (WMO-No. 306). A sovereign constellation should be designed to produce BUFR-compliant Level-2 retrievals from day one so that data enters existing assimilation pipelines without custom middleware. EUMETSAT's EPS-SG programme and NOAA's JPSS both publish open interface control documents that provide a practical reference architecture.

What is the realistic build-to-operations timeline and cost range for a small constellation?

A 4-satellite LEO constellation using microsatellite bus platforms (100–200 kg) with heritage microwave sounder payloads can realistically move from contract signature to first-satellite launch in 36–48 months. Indicative costs — inclusive of payload, bus, launch, and a five-year ground-segment operation — range from $120M to $350M depending on instrument specification and launch vehicle. This compares favourably with the $98B in economic losses the global community absorbed from cyclones in 2023 alone.

How do we keep the forecast useful when our satellite is on the other side of Earth?

Intersatellite links or bent-pipe relay through an allied ground network can close the data latency gap. Alternatively, onboard edge processing can generate compressed Level-2 retrievals that fit inside a store-and-forward downlink pass within 20–40 minutes of observation. Designing the constellation with two or three ground stations spread across longitude reduces worst-case latency to under 90 minutes — acceptable for NWP assimilation cycles at 6-hour intervals.

6.3.1Live

Cyclone Track Forecasting

Families carrying belongings along a flooded coastal road during a cyclone evacuation — Calm waters and green shorelines represent the vulnerable coastal ecosystems that satellite cyclone tracking systems work tirelessly to protect.

Satellite Cyclone Track Forecasting System Flow

1
Weather Satellite
Geostationary imager tracks storm structure hourly
2
Ground Station
Raw radiance data downlinked every 15 minutes
3
NWP Modelling
Ensemble models predict 5-day track and intensity
4
Public Alert
SMS, radio, and TV cyclone warnings issued

Satellite imagery feeds numerical weather models that generate cyclone track forecasts and trigger timely public evacuation alerts.

Page in the build queue

This application has its place in the atlas. The full page — short and long descriptions, what-matters bullets, sovereignty rationale, and the eight-field architecture block — is being written next.

Maturity reading: Operational systems exist with paying customers. Phase 1 built §4.1 (Maritime Intelligence) end-to-end as the depth-and-format reference. Section 4 is the next section to graduate from scaffold to full content; the rest follow on the roadmap.

Related applications

All in cyclone systems

6.3.2 · Next

Storm Intensity Monitoring

Bring this into your sovereign programme.

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