dim_observation_window.md

---
type: Parquet
title: dim_observation_window
description: Deduplicated per-window data coverage and reliability profiles
resource: ./dim/dim_observation_window.parquet
tags: [dimension, coverage, reliability, data-quality]
timestamp: 2024-12-31T07:30:00Z/2025-12-31T23:45:00Z
---

# dim_observation_window

Deduplicated coverage and reliability profiles. Each unique combination of coverage metrics gets a surrogate key (`observation_window_id`) referenced by [fact_energy_15m](fact_energy_15m.md).

| Column | Type | Description |
|--------|------|-------------|
| `observation_window_id` | INTEGER | PK. Surrogate key |
| `minutes` | DOUBLE | Minutes of observed data in window (<= 15.0) |
| `seconds_observed` | DOUBLE | Total seconds with telemetry coverage (capped at 900) |
| `data_coverage_pct` | DOUBLE | Observed coverage as percentage: 100 x `seconds_observed` / 900 |
| `seconds_reliable` | DOUBLE | Seconds from Silver rows passing all reliability checks (capped at 900) |
| `reliable_coverage_pct` | DOUBLE | Reliable coverage as percentage: 100 x `seconds_reliable` / 900 |
| `is_reliable_window` | INTEGER | Binary flag: `1` if `seconds_reliable` >= 720 (80% of 900 s), else `0` |

**Row count:** 1,554 (deduplicated from 4,103,703 source rows)