On June 2, 2026, the U.S. Patent and Trademark Office issued MDA Systems Ltd. a patent on a two-satellite radar-imaging method, and the grant is specific enough to be worth reading line by line. The record, US12644981B2, “System, method, and satellites for surveillance imaging and earth observation using synthetic aperture radar imaging,” describes a workflow in which a lead satellite collects synthetic-aperture-radar (SAR) data in one frequency band, a ground terminal processes that data to pick a second target location, and a trailing satellite then images that location at higher resolution in a second band. For a business reader, the relevant fact is not the physics but the form: this is an issued grant, which means MDA now holds enforceable coverage over the cue-and-revisit pattern the claim describes, not merely a pending application.

The distinction matters because of what a granted claim does versus a published application. A granted SAR claim is coverage MDA can assert; it defines a workflow that a competitor operating a similar two-satellite tasking chain would have to design around. The claim text returned with the record opens on exactly that architecture: a system comprising “a first satellite, a first trailing satellite, and a ground segment,” with the ground segment in the loop between the two passes. The patent is classified under three CPC codes in the G01S 13/9 radar-imaging family — G01S 13/9005, G01S 13/9021 and G01S 13/64 — which place it squarely in synthetic-aperture and along-track radar processing rather than in optical imaging.

A system and method for satellite imaging are provided. The system includes a first satellite, a trailing satellite, and a ground terminal.— System, method, and satellites for surveillance imaging and earth observation using synthetic aperture radar imaging, US12644981B2

What the claim actually covers

The grant covers a closed-loop tasking sequence rather than a single sensor. The abstract describes the lead satellite acquiring SAR data “in a first predetermined signal frequency band at a first imaging location,” transmitting it to the ground terminal, and the ground terminal then determining “a second imaging location from the SAR image data” and passing it to the trailing satellite, which images that location “in a second predetermined signal frequency band.” The record also describes an alternative in which a satellite “processes the image data onboard to generate a processed product” transmitted to a ground terminal or to a second satellite — an edge-processing variant that keeps the workflow on the same claim spine. The description text returned with the record notes operational detail down to band usage, referencing an S-band command link to the spacecraft and an X-band link to “receive SAR payload data from the spacecraft.”

For a competitive map, the value of the grant is the coordination it covers, not any one component. Single-satellite SAR is widely practiced; the inventive ground in this claim is the handoff — using one pass to derive where the second, sharper pass should look, with a ground segment mediating between two spacecraft. That is the freedom-to-operate question the grant raises for any operator building a multi-satellite revisit chain in radar: a tasking architecture that cues a trailing satellite from a leader's data, routed through a ground segment, now intersects an issued MDA claim.

Where it sits in MDA's footprint

The patent record search returns a small but telling MDA cluster, spread across the company's corporate lineage. The Earth-observation line runs from an older change-detection grant, US8548248B2 (“Correlated land change system and method,” issued 2013, assigned to MDA Information Systems), which claims a method of detecting “a persistent feature change” by comparing satellite images from different dates — a downstream-analytics patent — through to the new tandem-imaging grant on the upstream collection side. Alongside the imaging records sits a robotics patent, US9321175B2 (“Robotic manipulator articulation techniques,” issued 2016, assigned to MDA U.S. Systems), which covers inverse-kinematic control of a seven-joint manipulator — the on-orbit servicing and space-robotics heritage MDA is known for. The records carry three different assignee names — MDA Systems Ltd., MDA Information Systems, and MDA U.S. Systems — reflecting the corporate structure rather than three separate companies.

Read together, the cluster traces a footprint that spans the imaging value chain: the collection method (the new US12644981B2 tandem SAR grant), the analytics layer that turns repeat passes into change signals (US8548248B2), and the robotics line (US9321175B2) that sits adjacent to MDA's spacecraft and servicing work. The new grant adds an enforceable claim on the multi-satellite collection step that feeds the rest.

Reading the cluster as a roadmap of held coverage

One feature of the MDA record worth dwelling on is how few hits the search returns and how far apart they sit in time: a 2013 analytics grant, a 2016 robotics grant, and the 2026 tandem-imaging grant. A reader should not over-read a sparse return — the public index surfaces what is published and classified, and a company's full portfolio is larger than any keyword sweep shows. But the records that do surface are coherent rather than scattered. Each one sits on a different rung of the same Earth-observation ladder: capture the radar data, coordinate a second sharper pass, and turn repeat passes into change detection. The new grant fills the rung that was, on this record, previously empty — the multi-satellite collection step.

The band detail in the description is part of what makes the claim concrete rather than abstract. By naming an S-band command uplink and an X-band SAR-payload downlink, the record ties the workflow to a specific radio architecture rather than a generic two-satellite idea. For a competitor reading the grant for design-around purposes, the relevant boundaries are the ones the claim and specification draw: a ground segment in the loop between two passes, a derived second imaging location, and a higher-resolution follow-up collection. Those are the elements that, taken together, define the covered workflow.

The business edge it defines

What the grant buys, in plain terms, is a defined area a SAR competitor has to navigate. A granted claim on a two-satellite cue-and-revisit workflow is the kind of coverage that constrains how rivals architect a constellation's tasking logic if they want a leader satellite to direct a trailing satellite's higher-resolution pass through a ground segment. That is the contour of the freedom-to-operate pressure the record creates — bounded to the specific coordinated workflow the claim recites, and now in force as of the June 2 issue date. The reader can map it directly: an issued claim, three radar-imaging CPC codes, a tandem architecture, and a small surrounding cluster that shows MDA holds coverage across collection and analytics rather than at a single point.