The Reading Room

Holdings and series

• Public abstracts and open reports listed under Publications
• Internal technical reports identified by report ID and docket
• Reference material on acoustics, radio detection, infrasound, hydroacoustics, geophysics, and long-baseline inference
• Bound field records, instrument drawings, and magnetic media held at Calder Ridge

The published record is available online where possible. Bound volumes, older technical reports, and preservation-copy material are held at the Calder Ridge station and are available to researchers by arrangement. Rare materials do not circulate.

How to request a record

Requests should include the report ID, docket, catalog entry, or accession number when known. The records office checks whether the item is public, embargoed, restricted by a third-party agreement, or physically available for consultation. Older holdings may require condition review before replay or handling.

Accession numbers and finding aids

The Reading Room uses report IDs for publications and accession numbers for archival holdings. Accession numbers are not decorative; they describe where a record entered custody, what kind of media it is, and which review path applies before a visitor can handle it.

record_key = normalize(report_id OR catalog_id OR accession)
finding_aid = join(publications, catalog, archive_index, on=record_key)

if copy_state == PC AND access_copy_missing:
  release_state = reading_room_review

if origin_station is null:
  route_to = records_retention_committee

Access states

These access states are deliberately plain. They do not imply secrecy. In a long-lived archive, access is often constrained by condition, third-party agreements, unpublished collaborator work, or the simple fact that the only usable copy is still a preservation copy.

Restricted and retained series

The restricted index is mostly mundane: damaged tape, donor agreements, collaborator embargoes, private correspondence, staff records, instrument locations, and media without sufficient calibration notes. A small number of records remain retained because their origin station, transfer chain, or access copy cannot be reconciled cleanly enough for public use.