Best way to size the commercial drone market right now?

For defence-specific UAV TAM, I'd start with publicly available contract databases like USASpending.gov or FPDS, then layer in analyst reports from Mordor Intelligence or MarketsandMarkets as a sanity check — they have dedicated commercial and defence drone segments. The key is to split your TAM between platform hardware, payloads, and services (MRO, data), since defence contracts often bundle these differently and lumping them together will bloat your numbers.