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A Sojourner Technology Foundation representative standing with his back to the camera on a hillside, looking across the rooftops of a hillside community in Mesquita, Rio de Janeiro, in light rain.

Field assessmentFA-001

Mesquita, Rio de Janeiro.

In September 2026, the Foundation spent time with a municipal police battalion outside Rio de Janeiro to answer one question: what can this unit not do today, and would technology actually fix it?

Location
Mesquita, Baixada Fluminense
Rio de Janeiro, Brazil
Organization assessed
20º Batalhão de Polícia Militar
20th Military Police Battalion
Element
A specialized tactical element
Conducted
September 2026
Program area
Public Safety & Emergency Response

StatusAssessment complete · equipment delivered · next stage under consideration

This page records a completed field assessment and one equipment donation. A larger effort in Mesquita is under consideration, subject to Board approval and grant or donor funding. Until both are in place, no outcome figures are published and no impact is claimed for the proposed next stage.

Stage one

We assess before we give anything.

Most technology donated to an organization that did not ask for it, in a place nobody visited, becomes a box in a storeroom. The Foundation’s first stage is therefore not procurement. It is sitting with the people who would operate the technology, in the environment where they would have to operate it, and documenting what they actually cannot do.

This is the first field assessment the Foundation has completed. It is published in full here — including what it failed to establish — because a record that only appears once it has become a success story is not a record.

The view forward through the rain-covered windscreen of a vehicle climbing a wet hillside road in Mesquita, wipers mid-sweep, a vehicle ahead on the incline, a blue-railed watercourse running beside the road and a two-way radio mounted on the dashboard.
Mesquita, September 2026. An assessment is mostly this: being in the place, for long enough that the people who work there will tell you what actually does not work.
What we found

What the assessment found.

Aircraft are central to the work, but nobody funds them

Aerial capability has moved from a useful extra to part of how a team understands a situation before committing people to it. It became essential without a dedicated budget line ever following it.

The radio environment is contested

Personnel reported encountering handheld anti-drone systems, including equipment identified as the JF-1000, reportedly configured with 2.4 GHz and 5.8 GHz jamming modules — frequencies that overlap the control and video links used by many commercial aircraft. A handheld radio-frequency drone detector was recovered by the unit during an operation on 23 September 2026 and photographed at the battalion the following morning. That is not a reported capability. It is a confirmed one: what the team is flying against is not only disruption, but detection.

A handheld anti-drone jammer marked JF-1000, held horizontally in both hands by a police officer.
JF-1000 handheld anti-drone system. Reportedly configured with 2.4 GHz and 5.8 GHz jamming modules — the same bands most commercial aircraft use for control and video.
A handheld radio-frequency detector displaying the words Detecting UAVs above a frequency spectrum trace.
06:52:05 — the device sweeping 300–6200 MHz, reading “Detecting UAVs”.

Recovered handheld RF drone detector. Taken by the unit during an operation on 23 September 2026 and photographed at the battalion the following morning. Equipment of this kind is why the Foundation treats the radio environment — not the airframe — as the problem to solve.

Why this is a resilience problem

An aircraft costs almost a year of an officer’s salary.

Set those two figures beside each other and the picture changes. Losing a single aircraft is not a maintenance event; it is a financial one, for a unit with no replacement budget and for the individuals in it. That is what makes an adversary with a jammer effective long before the jammer ever works — the cost of the risk is carried by the people flying.

R$43,000about US$8,500
reported cost of one capable multirotor aircraft
R$70,000about US$13,900
approximate annual earnings of a newly assigned officer

Dollar figures converted at R$1 = US$0.198, 23 October 2026, and rounded. The real figures are what the unit reported; the dollar figures are ours.

What was delivered

One aircraft.

This is the first equipment the Foundation has delivered to anyone. It is recorded here because it happened, and it is recorded precisely: one aircraft, one unit, one date, one figure. A donation described any more grandly than that stops being a record and starts being marketing.

One capable multirotor aircraft

Delivered
23 September 2026
Value
R$ 34,728.14 — about US$6,900
Received by
the GAT detachment leader, on behalf of the unit
Basis
in-kind donation to the organization

For scale against the two numbers above: about half of what a newly assigned officer earns in a year.

Dollar figures converted at R$1 = US$0.198, 23 October 2026, and rounded. The real figures are what the unit reported; the dollar figures are ours.

On what terms

  1. The donation is to the organization, not to an operation. STF does not direct, task, fly, or take part in the unit’s activity, and takes no live feed, imagery or operational data from it.
  2. Lawful use is a condition of the gift. STF screens the receiving organization before giving, and will not give again where that condition has not been kept.
  3. Beyond those conditions, how the unit employs the aircraft is its own decision, under Brazilian law and its own chain of command. STF has no authority there and claims none.
  4. The unit has undertaken to report back roughly how often the aircraft is flown and, in general terms, how it has helped the department. Not imagery, personal data, or case detail — STF neither asks for those nor will accept them. That report is how this record gets completed, and if it never arrives, this page will say so rather than quietly stop mentioning it.

This is recorded as a delivery, not as a project. The Foundation’s published standard asks a project to state its measurable outcome before work begins — that is the work of the next stage, and it is why this page reports what was given rather than what it achieved.

What we could not establish

The parts we could not confirm.

  • Whether more capable drone-detection systems are available to criminal organizations in the area. Personnel raised the concern; the presence of systems of that class was not independently confirmed and is not asserted here.
  • The technical configuration of the anti-drone equipment described. It is recorded as reported, not as verified by measurement.
  • Any figure describing the unit’s performance, before or after. None was collected, so none is published.

Provide officers with better information, earlier, while reducing unnecessary exposure of personnel and civilians to danger.

Sojourner Technology Foundation, preliminary assessment, September 2026
Where this goes

What the next stage would be.

  1. AssessedComplete. The requirement is documented, which is the part that usually never happens.
  2. DeliveredOne capable multirotor aircraft, 23 September 2026, R$ 34,728.14 (about US$6,900) — the Foundation’s first delivered equipment. The model is not published.
  3. ReportingUndertaken. A rough employment count and a general account of benefit, in the unit’s own words, and published as exactly that.
  4. Under considerationA larger effort in Mesquita, addressing the shortfalls set out above: resilient aircraft, communications that hold up, a shared operating picture, and the training and technical support behind them.
  5. Board approvalRequired before the Foundation commits to any of it. This assessment goes to the Board as it stands, including the parts it could not establish.
  6. FundingRequired alongside it. Work at this scale is carried by grants and by donors, and that funding is still to be raised.
  7. EvaluationThe platforms named above are candidates to be evaluated, not selections already made. Cybersecurity, communications, legal and data-protection review clear first.
  8. OutcomeAgreed with the unit before anything further is given — that is what turns an assessment into a project. Outcomes are published here with a named source, or not published at all.