{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":491,"cluster_id":4910003735,"lat":18.665,"lng":72.865},"signals":[{"signal":"temperature","resolved_at":"2026-09-14T09:52:07Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":491,"cluster_id":4910003735,"value":{"temperature_c_idw":29.4252},"valid_time":{"kind":"valid_time","requested":"2026-09-14T09:52:07Z","served_window_start_utc":"2026-09-14T09:16:47+00:00","served_window_end_utc":"2026-09-14T10:16:47+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":2407,"pin_sha256":"fb34cc04a91fc3ea4343a8f9408a01aeb879aceae0f66b80e1e8d73ac53af076","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-14T10:16:47+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":"2026-09-14T09:52:07Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":491,"cluster_id":4910003735,"value":{"rainfall_mm_24h_idw":0.0113},"valid_time":{"kind":"valid_time","requested":"2026-09-14T09:52:07Z","served_window_start_utc":"2026-09-14T09:16:47+00:00","served_window_end_utc":"2026-09-14T10:16:47+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":2407,"pin_sha256":"fb34cc04a91fc3ea4343a8f9408a01aeb879aceae0f66b80e1e8d73ac53af076","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-14T10:16:47+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":"2026-09-14T04:52:08Z","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` 2026-09-14T04:52:08Z is after the latest witnessed instant (2026-09-11T17:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-14T12:22:07Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":491,"cluster_id":4910003735,"value":{"aqi_pm2_5_idw":25.7064,"aqi_pm10_idw":27.118,"aqi_no2_idw":27.5929,"aqi_so2_idw":6.6532,"aqi_co_idw":27.9762,"aqi_ozone_idw":15.7305},"valid_time":{"kind":"valid_time","requested":"2026-09-14T12:22:07Z","served_window_start_utc":"2026-09-14T12:00:53+00:00","served_window_end_utc":"2026-09-14T13:00:53+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":1645,"pin_sha256":"040285e8858f2a0493c55a573a660d911a04ca4983bc9bb467f9c209afc8742f","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-14T13:00:53+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":"2026-09-14T12:22:07Z","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":491,"cluster_id":4910003735,"value":{"temperature_c_idw":27.0878,"rainfall_mm_24h_idw":8.1138,"humidity_pct_idw":80.2272,"wind_speed_kmph_idw":13.8413},"valid_time":{"kind":"valid_time","requested":"2026-09-14T12:22:07Z","served_window_start_utc":"2026-09-14T12:06:41+00:00","served_window_end_utc":"2026-09-14T13:06:41+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":2151,"pin_sha256":"3598ab6d3786acd607324404b8414896f82d318c2b458e3b09714041131e0cf9","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-14T13:06:41+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}}]}