{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":496,"cluster_id":4960009410,"lat":18.025,"lng":75.365},"signals":[{"signal":"temperature","resolved_at":"2026-08-18T09:33:51Z","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` 2026-08-18T09:33:51Z: the nearest pin's natural window is [2026-08-18T10:16:45+00:00, 2026-08-18T11:16:45+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-08-18T09:33:51Z","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` 2026-08-18T09:33:51Z: the nearest pin's natural window is [2026-08-18T10:16:45+00:00, 2026-08-18T11:16:45+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"rainfall","resolved_at":"2026-08-18T09:33:51Z","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` 2026-08-18T09:33:51Z is after the latest witnessed instant (2026-08-17T12:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-08-18T09:33:51Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":496,"cluster_id":4960009410,"value":{"aqi_pm2_5_idw":25.4905,"aqi_pm10_idw":40.3331,"aqi_no2_idw":10.3015,"aqi_so2_idw":4,"aqi_co_idw":null,"aqi_ozone_idw":20.1201},"valid_time":{"kind":"valid_time","requested":"2026-08-18T09:33:51Z","served_window_start_utc":"2026-08-18T09:00:53+00:00","served_window_end_utc":"2026-08-18T10:00:53+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":2,"aqi_pm10_n_stations":3,"aqi_no2_n_stations":4,"aqi_so2_n_stations":1,"aqi_co_n_stations":0,"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":1144,"pin_sha256":"b9e18d77f06f75727ebe796a2e3d2c0334a4c8c7e2c702677ecd65939e0b3495","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-18T10:00:53+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":"2026-08-18T09:33:51Z","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":496,"cluster_id":4960009410,"value":{"temperature_c_idw":28.665,"rainfall_mm_24h_idw":1.6063,"humidity_pct_idw":66.1552,"wind_speed_kmph_idw":22.5426},"valid_time":{"kind":"valid_time","requested":"2026-08-18T09:33:51Z","served_window_start_utc":"2026-08-18T09:06:49+00:00","served_window_end_utc":"2026-08-18T10:06:49+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":1500,"pin_sha256":"b2f16f3309d45b10cfbd2f7ac1492356acbbf6be9f5efdb6f6d089e1c7f9bb56","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-18T10:06:49+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}}]}