Source: https://guthlabs.ai/docs/instruments/golden-hour-sun-position-calculator/qualification/

instrument qualification / verified-with-binding-errata

# Golden Hour / Sun Position Calculator qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-6

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 4,
    "field": "sunrise/sunset UTC and local for 90E, UTC+5:30",
    "wrong": "12:26:40 UTC / 05:56:40 local",
    "correct": "23:56:40 UTC (prev day) / 05:26:40 local civil (solar 05:56:40 - 6h = UTC; +5.5h = local)",
    "cause": "time-zone sign error: for 90E longitude UTC = solar - 6h; she ADDED the offset, and her \"local civil\" value is actually the solar time"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/golden-hour-sun-position-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/golden-hour-sun-position-calculator/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/golden-hour-sun-position-calculator/implementation/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`