Citing a satellite-derived damage count in a funding appeal

A damage number without a source line is the first thing a donor technical reviewer circles. There is no way to tell where it came from, when it was collected, or what counting rule produced it, and that gap is what gets flagged. If you are drafting a flash appeal or revising a pooled-fund allocation table under a 72-hour clock, the citation matters almost as much as the figure itself.

What a reviewer is actually checking

A donor or pooled-fund secretariat reading your appeal is not auditing your methodology from scratch. They are checking three things fast: is the imagery date close enough to the event to be credible, is the source named rather than implied, and does the counting method match the number's apparent precision. A figure like "14,200 structures damaged" with no footnote reads as an estimate dressed up as a count. The same figure with "VHR optical imagery, acquired [date], structure-by-structure visual classification" reads as something a reviewer can trace and, if needed, push back on later without the whole appeal losing credibility.

This is also where cluster coordinators get burned during revision cycles. A number that goes into a draft without a source gets challenged at the inter-cluster review, and by then nobody remembers whether it came from a partner's rapid assessment, a government line ministry, or an imagery vendor.

The minimum citation line

For a satellite-derived damage count, the citation needs four elements, and all four belong in the same footnote or line, not scattered across a methodology annex you hope nobody reads closely:

1. Source type and sensor: name the imagery as very-high-resolution optical satellite or aerial imagery. "Satellite data" alone tells a reviewer nothing about resolution or collection method.
2. Ground sample distance or resolution class: this signals what level of damage (total collapse vs. partial) the imagery can actually distinguish.
3. Acquisition date, not the date of analysis or the date of appeal submission. If pre- and post-event imagery were compared, give both dates.
4. Counting unit and method: structure-by-structure, grid-cell, or area-based. "Damage count" and "area affected" are not the same claim, and conflating them is one of the fastest ways to lose a reviewer's trust.

A workable footnote looks like this: "Structure-level damage count derived from VHR optical satellite imagery (≤0.5 m) acquired [date], [X] days post-event. Count reflects visually assessed structural damage and has not been field-verified."

That last clause matters. Naming what has not been done protects you more than it exposes you. Reviewers who have sat through enough appeal cycles already assume a number produced in days wasn't ground-truthed. Saying so plainly, once, closes the question instead of leaving it open for someone to raise in a funding committee meeting.

Where this goes in the document

Put the citation directly beside the number, as a footnote or inline parenthetical, rather than burying it in an annex three sections later. If the appeal has a standard template with a "data sources" table, list the imagery provider or platform by name alongside the government and cluster sources feeding the rest of the needs overview. Treat it the way you'd treat a population figure pulled from a census: named, dated, and scoped to what it actually measures.

If your damage figure is doing real work in the appeal, meaning it's driving a sector allocation or a severity classification, it earns a full sentence of methodology, not a parenthetical. If it's background context, a short footnote is enough. Match the citation's weight to the number's weight in the ask.

None of this requires a long methods section. It requires the same four facts, stated the same way, every time a damage figure appears in an appeal. A standardized structure-by-structure count built for exactly this handoff, with the sensor, resolution, and acquisition date already documented the way appeal templates expect, is what Humanitarian Damage Assessment delivers.

If your appeal deadline is days out and the damage count still needs a defensible source line, that's the gap this is built to close.