{
  "total": 3,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 1117,
    "series": 752,
    "last_checked_at": "2026-10-27T07:49:20.000Z",
    "latest_result_counts": {
      "confirmed": 706,
      "changed": 5,
      "unreachable": 21,
      "needs_review": 2,
      "partial": 7,
      "not_found_on_page": 11
    },
    "method": "Each source URL is fetched and the recorded numbers are looked for in the page (PDFs via pdftotext); anything not confirmed is reviewed by a human. Log: /downloads/price_rechecks.jsonl"
  },
  "observations": [
    {
      "id": "po_20261025_12afb5a14f09",
      "series_key": "ps_1b2a5add297fbf71",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "use_case_ids": [
        "hydropower-penstock-inspection"
      ],
      "provider_id": null,
      "description": "Comparative drone monitoring flight of a penstock against its reference state (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 700,
      "high": 1500,
      "currency": "EUR",
      "unit": "per flight",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T22:32:28.284Z",
      "content_hash": "sha256:12afb5a14f09a02a2a1b96ac4d6815f104858ec31878135bf89f5b19b0b52b31",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 783,
        "high": 1678,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11881,
          "eur_per_usd": 0.89381,
          "rate_date": "2026-10-26",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-26, not at the price's as_of date. Indicative only."
      }
    },
    {
      "id": "po_20261025_a2645a7a1365",
      "series_key": "ps_69652494358b2afb",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "use_case_ids": [
        "hydropower-penstock-inspection"
      ],
      "provider_id": null,
      "description": "3D photogrammetric reference survey of a penstock (geometry and supports) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1500,
      "high": 3500,
      "currency": "EUR",
      "unit": "per survey",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T22:32:28.284Z",
      "content_hash": "sha256:a2645a7a13655e97ed43543071fa7af466a88401abf6dea708fc0d522ee7e2ab",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 1678,
        "high": 3916,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11881,
          "eur_per_usd": 0.89381,
          "rate_date": "2026-10-26",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-26, not at the price's as_of date. Indicative only."
      }
    },
    {
      "id": "po_20261025_e21ec8b18f85",
      "series_key": "ps_c959a04171592df9",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "use_case_ids": [
        "hydropower-penstock-inspection"
      ],
      "provider_id": null,
      "description": "External visual + thermal drone inspection of an ordinary penstock, report ranked by support; aerial survey of the outside of the pipe, not an in-pipe robot (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1200,
      "high": 2800,
      "currency": "EUR",
      "unit": "per penstock",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T22:32:28.284Z",
      "content_hash": "sha256:e21ec8b18f854fefdaa072c86469dcb5b55d06a45ac5a1b8917fafd440e53dd1",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 1343,
        "high": 3133,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11881,
          "eur_per_usd": 0.89381,
          "rate_date": "2026-10-26",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-26, not at the price's as_of date. Indicative only."
      }
    }
  ],
  "series": [
    {
      "series_key": "ps_1b2a5add297fbf71",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "provider_id": null,
      "description": "Comparative drone monitoring flight of a penstock against its reference state (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per flight",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T22:32:28.284Z",
      "last_observed_at": "2026-10-25T22:32:28.284Z",
      "current": true,
      "latest": {
        "low": 700,
        "high": 1500,
        "as_of": "2026-09-22",
        "id": "po_20261025_12afb5a14f09"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    },
    {
      "series_key": "ps_69652494358b2afb",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "provider_id": null,
      "description": "3D photogrammetric reference survey of a penstock (geometry and supports) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per survey",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T22:32:28.284Z",
      "last_observed_at": "2026-10-25T22:32:28.284Z",
      "current": true,
      "latest": {
        "low": 1500,
        "high": 3500,
        "as_of": "2026-09-22",
        "id": "po_20261025_a2645a7a1365"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    },
    {
      "series_key": "ps_c959a04171592df9",
      "kind": "benchmark",
      "use_case_id": "hydropower-penstock-inspection",
      "provider_id": null,
      "description": "External visual + thermal drone inspection of an ordinary penstock, report ranked by support; aerial survey of the outside of the pipe, not an in-pipe robot (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per penstock",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/hydropower-penstock-drone-inspection-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T22:32:28.284Z",
      "last_observed_at": "2026-10-25T22:32:28.284Z",
      "current": true,
      "latest": {
        "low": 1200,
        "high": 2800,
        "as_of": "2026-09-22",
        "id": "po_20261025_e21ec8b18f85"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    }
  ],
  "note": "Only one observation per series so far: we started recording every price on 2026-10-25 and re-check every source on a schedule. A trend appears when a re-checked source shows a different price (we never overwrite old observations).",
  "pagination": {
    "total": 3,
    "limit": 200,
    "offset": 0,
    "returned": 3,
    "next_offset": null,
    "next": null,
    "prev": null
  },
  "license": "Whirrwork (https://whirrwork.com), CC BY 4.0"
}