{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":470,"cluster_id":4700006385,"lat":19.055,"lng":75.585},"signals":[{"signal":"temperature","resolved_at":"2026-10-22T17:17:00Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"gap_in_observed_window","message":"no witness observed `at` 2026-10-22T17:17:00Z: the nearest pin's natural window is [2026-10-22T17:24:20+00:00, 2026-10-22T18:24:20+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-10-22T17:17:00Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"gap_in_observed_window","message":"no witness observed `at` 2026-10-22T17:17:00Z: the nearest pin's natural window is [2026-10-22T17:24:20+00:00, 2026-10-22T18:24:20+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"rainfall","resolved_at":"2026-10-22T17:17:00Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-10-22T17:17:00Z is after the latest witnessed instant (2026-09-12T03:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-10-22T17:17:00Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":470,"cluster_id":4700006385,"value":{"aqi_pm2_5_idw":68.7203,"aqi_pm10_idw":100.7706,"aqi_no2_idw":9.2247,"aqi_so2_idw":null,"aqi_co_idw":46.9681,"aqi_ozone_idw":40.1604},"valid_time":{"kind":"valid_time","requested":"2026-10-22T17:17:00Z","served_window_start_utc":"2026-10-22T17:00:53+00:00","served_window_end_utc":"2026-10-22T18:00:53+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"cpcb_idw_district","support_m":null,"detail":{"aqi_pm2_5_n_stations":3,"aqi_pm10_n_stations":2,"aqi_no2_n_stations":3,"aqi_so2_n_stations":0,"aqi_co_n_stations":2,"aqi_ozone_n_stations":2},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":2096,"pin_sha256":"efe996df80a87eb462be8f3aaf623a01bae83042fd998672afc3cbdab6a71996","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-10-22T18:00:53+00:00","support_kind":"cpcb_idw_district","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"weather_google","resolved_at":"2026-10-22T17:17:00Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"weather_google","unit":"google_weather_mixed","admin_code":470,"cluster_id":4700006385,"value":{"temperature_c_idw":24.6922,"rainfall_mm_24h_idw":0,"humidity_pct_idw":63.8336,"wind_speed_kmph_idw":6.7286},"valid_time":{"kind":"valid_time","requested":"2026-10-22T17:17:00Z","served_window_start_utc":"2026-10-22T17:06:38+00:00","served_window_end_utc":"2026-10-22T18:06:38+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"google_weather_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3,"rainfall_mm_24h_n_stations":3,"humidity_pct_n_stations":3,"wind_speed_kmph_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":3068,"pin_sha256":"6b8dfb39d5e8a00a5bb546a56654a73632582b4dec9d3b2dc05cf4c26d9bcab7","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-10-22T18:06:38+00:00","support_kind":"google_weather_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}}]}