Earth observation & imagery: questions, answered — Satellize
Satellize
Seeing your own territory with your own eyes

Earth observation & imagery

Optical, radar, hyperspectral and thermal sensing, tasked from your operations room. The atlas covers 734 applications in depth; these are the questions that come first.

The basics
What is Earth observation?
Measuring the planet from orbit: optical imagery, radar that sees through cloud and darkness, hyperspectral sensors that identify materials by their light signature, and thermal instruments that read heat. Together they turn territory into data a government can act on.Space Solutions atlas
What is satellite imagery used for?
Border monitoring, crop forecasting, disaster mapping, infrastructure inspection, emissions attribution, fisheries enforcement and several hundred narrower jobs. Our atlas documents 734 distinct applications across 16 domains, each with the sensors and revisit it actually needs.Space Solutions atlas
What is SAR imagery?
Synthetic aperture radar: the satellite illuminates the ground with its own radio signal, so it images at night and through cloud. It is the workhorse for maritime surveillance, flood mapping and millimetre-scale ground-movement measurement, where optical sensors go blind.Optical or SAR?
What is satellite remote sensing resolution?
How small an object the sensor can distinguish. Sub-metre resolution reads individual vehicles; ten-metre resolution reads field boundaries and ships. Higher is not always better: a national crop survey needs breadth and revisit more than it needs to count tractors.Agriculture domain
What is hyperspectral imaging from space?
Sensing in hundreds of narrow light bands instead of a few broad ones, so materials identify themselves by spectral fingerprint: crop species, mineral outcrops, oil films, stressed vegetation. It answers 'what is it' where ordinary imagery only answers 'where is it'.Precision agriculture
Choosing and buying
How often can a satellite revisit the same location?
One satellite in low Earth orbit passes a given site roughly twice a day at varying angles. Revisit is a constellation property: more spacecraft, shorter gaps. Daily revisit suits agriculture; a contested border wants hours. We size constellations from the required revisit backwards.One satellite, or a constellation?
Satellite imagery vs drones: which is better for national monitoring?
Different tools. Drones win on a single site for hours at centimetre detail. Satellites win on coverage: every district, every week, no airspace clearance, no crews. National programs use both, with satellites cueing drones to the places worth a closer look.Tactical geospatial intelligence
How is satellite data used in agriculture?
Yield estimation before harvest, soil-moisture and irrigation efficiency mapping, pest-pressure detection and origin traceability, down to sub-acre resolution with weekly revisit. The buyer is usually the agriculture ministry or the crop insurer, and the payoff is a season, not a decade, away.Agriculture domain
Can satellites detect methane leaks?
Yes. Spectrometers in orbit detect and attribute methane plumes to individual facilities, which turns a diffuse national emissions figure into a list of addresses. Regulators use it for enforcement; operators use it to find leaks that are, literally, money escaping into the air.Methane monitoring
How much does satellite imagery cost for a government?
Bought by the scene, it adds up fast and the queue belongs to someone else. Owned as a constellation, the cost converts to a capital program with marginal tasking near zero. The crossover point arrives sooner than most ministries expect; we work that arithmetic per requirement.Buy imagery, or own the satellite?
In practice
How do countries monitor their borders with satellites?
Layered sensing: radar for all-weather change detection along the line, optical for identification, RF sensors for emitters that move at night. The output is not pictures but alerts: new tracks, new structures, new activity, delivered to the border force's own operations room.Smart borders
Can satellite imagery be used as evidence in court or for enforcement?
Increasingly, yes. Time-stamped, orbit-verified imagery documents illegal fishing, encroachment, deforestation and sanctioned-cargo transfers. Chain of custody matters: data downlinked to your own ground station, processed in your own jurisdiction, is far easier to defend than a screenshot from a foreign portal.Maritime security
What satellite sensors detect ground movement in infrastructure?
Interferometric SAR compares radar phase between passes and measures deformation at millimetre scale: subsiding dams, creeping bridges, settling railways. One constellation surveys every major structure in the country weekly, which no inspection workforce can match.Infrastructure domain
How can a developing country get its own Earth observation capability?
Start from the three or four decisions the government keeps making blind, size a small constellation against them, and buy it as a delivered program with training included. The countries doing this well skipped the prestige projects and bought revisit over resolution.Our Offerings
Why does tasking priority on commercial imagery satellites matter?
Because in a crisis everyone wants the same pictures at the same time, and the provider's home government eats the queue. Shutter control is real: providers have been ordered to withhold or degrade imagery of specific regions. Priority you do not control is priority you do not have.Buy imagery, or own the satellite?
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