Use this read-only tool to retrieve the SPECTRA historical field-map contract for one crypto public company ticker or SEC CIK. It returns issuer-specific filing choreography and pressure-map context used by DeltaSignal report and visualization workflows. Parameters: ticker is required; pass a public-company symbol such as RIOT, MARA, COIN, MSTR, or HUT when one exists, or a zero-padded SEC CIK for ATLAS-7 issuers without a ticker. Behavior: read-only and idempotent; it performs one HTTPS read, has no destructive side effects, and does not write files, wallets, orders, or account state. Use it when the user asks for SPECTRA, field-map, historical pressure, filing choreography, or report-visualization context for a named issuer.