Tool · metrology

Time comparison reference

A discovered physical requirement. Its caller-specific capability and making inventory remain open.

Discovered · unresearchedClosure: OpenInventory incomplete

Capability requirements and tolerances

Consumer-specific numerical targets, quantities and acceptance limits remain open or incompletely reviewed. No smartphone-grade suitability is claimed. Distinct capability tiers require their own making route and qualification.

Making steps · draft selected for navigation; not a validated fabrication specification.

Known Parts and Tools

The selected route supplies this page's inventory and the map's dependency links from one record. Further requirements may be missing; review flags do not prove physical suitability.

Requirement	Role	Use	Relationship status
Astronomical time fixed-star sighting frame	Part	incorporated	Cycle-checked; compatibility unknown
Astronomical time mechanical interval transfer assembly	Part	incorporated	Cycle-checked; compatibility unknown
Collected wood	Part	incorporated cold-work guard retention and consumed commissioning records/trial stock	Cycle-checked; compatibility unknown
Metalworking stone shield slabs	Part	incorporated; separate cold making guard units	Cycle-checked; compatibility unknown
Stone hand tools	Tool	reused making	Cycle-checked; compatibility unknown
Abrasive stones	Tool	reused making; abrasive wear losses	Cycle-checked; compatibility unknown
Coarse comparison reference	Tool	verification; relative geometry only	Cycle-checked; compatibility unknown
Fiber cord	Part	incorporated and consumed replacement allocation	Cycle-checked; compatibility unknown
Woven cloth	Part	consumed dry cleaning	Cycle-checked; compatibility unknown
Timber structures	Tool	reused making support	Cycle-checked; compatibility unknown
Coarse stone supports	Tool	reused making support	Cycle-checked; compatibility unknown
Containers	Tool	reused dry handling and waste	Cycle-checked; compatibility unknown
Dry storage cover	Tool	reused storage	Cycle-checked; compatibility unknown

Making outline

Build a retained nighttime fixed-star transit sight and separate uncalibrated mechanical oscillator/event counter; directly compare repeated same-star transits, tune and characterize empirical interval transfer without an already calibrated clock
Detailed procedure and acceptance remain unresearched.

What remains unresolved

Full inventory, required quantities, process settings, numerical demand and suitability remain open.
Current memory-first method needs source and compatibility review.
Current memory-first method needs source and compatibility review.

Proposed capability specification

{
  "reference_origin": "Independent astronomical/mechanical/other time realization candidate; exact observation and transfer chain not selected.",
  "uncertainty": "not yet specified",
  "stability": "not yet specified",
  "realization_method": "not yet specified",
  "transfer_method": "not yet specified",
  "unit_relationship": "not yet specified"
}

Earlier research provenance

proposals/2026-10-08-discovery/electronics/frontier-report.md

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Used by

Items that directly require this item in their selected inventory.

Paths from Smartphone

These routes together include every item that can lead from Smartphone to this item. Repeated path combinations are collapsed; recipes are omitted.

Shortest route: Smartphone → Cover glass → Time comparison reference

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