{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":487,"cluster_id":4870011290,"lat":20.595,"lng":74.035},"signals":[{"signal":"temperature","resolved_at":"2026-09-18T14:44:52Z","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` 2026-09-18T14:44:52Z is after the latest witnessed instant (2026-09-18T14:16:40+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-09-18T14:44:52Z","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` 2026-09-18T14:44:52Z is after the latest witnessed instant (2026-09-18T14:16:40+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall","resolved_at":"2026-09-18T14:44:52Z","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` 2026-09-18T14:44:52Z 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":"2026-09-18T14:44:52Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":487,"cluster_id":4870011290,"value":{"aqi_pm2_5_idw":27.6803,"aqi_pm10_idw":57.5518,"aqi_no2_idw":12.8256,"aqi_so2_idw":7.2833,"aqi_co_idw":13.0546,"aqi_ozone_idw":16.0914},"valid_time":{"kind":"valid_time","requested":"2026-09-18T14:44:52Z","served_window_start_utc":"2026-09-18T14:00:53+00:00","served_window_end_utc":"2026-09-18T15:00:53+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":4,"aqi_pm10_n_stations":2,"aqi_no2_n_stations":2,"aqi_so2_n_stations":4,"aqi_co_n_stations":2,"aqi_ozone_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1730,"pin_sha256":"f806a6a283ba7c8c7c781a50380fcbeefeedfbc2313260024c698fa13fc7d5d5","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-18T15:00:53+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":"2026-09-18T14:44:52Z","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":487,"cluster_id":4870011290,"value":{"temperature_c_idw":24.5249,"rainfall_mm_24h_idw":4.4474,"humidity_pct_idw":88.271,"wind_speed_kmph_idw":10.4525},"valid_time":{"kind":"valid_time","requested":"2026-09-18T14:44:52Z","served_window_start_utc":"2026-09-18T14:06:39+00:00","served_window_end_utc":"2026-09-18T15:06:39+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":2249,"pin_sha256":"1e983a4066b803ae7c35d6c5ecf6ff5a25b85a2b55b8a2ce87a54b976b3f1717","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-18T15:06:39+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}}]}