Two researchers at the center, Don Rassler and Muhammad al-Ubaydi, reviewed the roughly 30 pages she sent. Confirming the authenticity of documents from a war zone is always tricky. But in a nine-page assessment, an advance copy of which was provided to The New York Times along with the documents themselves, the authors concluded the materials were genuine based on where and how Ms. Mironova obtained them and the center’s experience working with an array of captured battlefield material.

All of the documents appear to be from around 2015 — the early phases of the drone program — and the collection includes a mix of official Islamic State forms and handwritten notes, according to the researchers’ analysis.

The materials reveal that the Islamic State, much like its forerunner, Al Qaeda’s affiliate in Iraq, is detail-oriented and bureaucratic when it comes to its operations. According to the assessment of the documents, the Islamic State’s drone unit falls under the Al Bara’ bin Malik Brigade, a part of the aviation sector of the Islamic State’s Committee for Military Manufacturing and Development.

The standardized four-page checklist for drone operations provided another example. On the first page, drone operators were asked to provide details about their mission — specifically, the type of mission (there are six options, including “Bombing” and “Explosive Plane”), the militants who were involved, the location and the way point coordinates for the flight.

The second page of the form consisted of a checklist that seems to have been designed to help the drone operators conduct pre- or post-mission checks of their systems and equipment (including “Bomb Ignition sys” and “Bomb igniter RC”), the assessment said. The third page was a checklist of gear in the operator’s “tool case,” including “screwdriver,” “pliers” and “knife.”

The last page of the form asked the operators to note whether their mission had succeeded or failed. It also provided space for the operators to write notes, perhaps to document lessons learned from failed missions or interesting events that occurred during successful ones, the assessment said.

The documents also contained detailed acquisition records, essentially shopping lists for the off-the-shelf commercial technology that the Islamic State is buying.