{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":490,"cluster_id":4900011178,"lat":18.965,"lng":73.855},"signals":[{"signal":"temperature","resolved_at":"2026-08-28T03:02:41Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":490,"cluster_id":4900011178,"value":{"temperature_c_idw":23.6111},"valid_time":{"kind":"valid_time","requested":"2026-08-28T03:02:41Z","served_window_start_utc":"2026-08-28T02:16:41+00:00","served_window_end_utc":"2026-08-28T03:16:41+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2007,"pin_sha256":"5641af576d088af3a70374924e637da6e5269047acde1e67fefed44e4d5ab8e5","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-28T03:16:41+00:00","support_kind":"imd_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}},{"signal":"rainfall_imd","resolved_at":"2026-08-28T03:02:41Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":490,"cluster_id":4900011178,"value":{"rainfall_mm_24h_idw":2.0358},"valid_time":{"kind":"valid_time","requested":"2026-08-28T03:02:41Z","served_window_start_utc":"2026-08-28T02:16:41+00:00","served_window_end_utc":"2026-08-28T03:16:41+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"rainfall_mm_24h_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2007,"pin_sha256":"5641af576d088af3a70374924e637da6e5269047acde1e67fefed44e4d5ab8e5","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-28T03:16:41+00:00","support_kind":"imd_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}},{"signal":"rainfall","resolved_at":"2026-08-27T22:02:41Z","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` 2026-08-27T22:02:41Z is after the latest witnessed instant (2026-08-27T12:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-08-28T03:02:41Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":490,"cluster_id":4900011178,"value":{"aqi_pm2_5_idw":30.1889,"aqi_pm10_idw":56.8624,"aqi_no2_idw":24.2742,"aqi_so2_idw":4.8969,"aqi_co_idw":30.8249,"aqi_ozone_idw":8.7432},"valid_time":{"kind":"valid_time","requested":"2026-08-28T03:02:41Z","served_window_start_utc":"2026-08-28T03:00:53+00:00","served_window_end_utc":"2026-08-28T04:00:53+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":4,"aqi_no2_n_stations":4,"aqi_so2_n_stations":4,"aqi_co_n_stations":4,"aqi_ozone_n_stations":4},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1301,"pin_sha256":"58ed6c4ce1e8dfd0a0aa8f8338078b83af167682dca532b0acf2fb2109d868a6","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-28T04:00:53+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":"2026-08-28T03:02:41Z","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":490,"cluster_id":4900011178,"value":{"temperature_c_idw":25.3319,"rainfall_mm_24h_idw":2.9414,"humidity_pct_idw":82.5474,"wind_speed_kmph_idw":20.9642},"valid_time":{"kind":"valid_time","requested":"2026-08-28T03:02:41Z","served_window_start_utc":"2026-08-28T02:06:43+00:00","served_window_end_utc":"2026-08-28T03:06:43+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":1733,"pin_sha256":"2d909158d43641f246bd3505cb926df4563e83a9966758a6755e4328a050d3c7","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-28T03:06:43+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}}]}