{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":490,"cluster_id":4900006413,"lat":18.505,"lng":74.465},"signals":[{"signal":"temperature","resolved_at":"2026-09-09T02:22:58Z","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":4900006413,"value":{"temperature_c_idw":21.3297},"valid_time":{"kind":"valid_time","requested":"2026-09-09T02:22:58Z","served_window_start_utc":"2026-09-09T02:16:41+00:00","served_window_end_utc":"2026-09-09T03:16:41+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":2281,"pin_sha256":"49d249fb4153e0cdb4fa9a6cbadeb81e4ead4e9dd6af19cb1d60ba8f7308c2db","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T03:16:41+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":"2026-09-09T02:22:58Z","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":4900006413,"value":{"rainfall_mm_24h_idw":7.9413},"valid_time":{"kind":"valid_time","requested":"2026-09-09T02:22:58Z","served_window_start_utc":"2026-09-09T02:16:41+00:00","served_window_end_utc":"2026-09-09T03:16:41+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":2281,"pin_sha256":"49d249fb4153e0cdb4fa9a6cbadeb81e4ead4e9dd6af19cb1d60ba8f7308c2db","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T03:16:41+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":"2026-09-09T02:22:58Z","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` 2026-09-09T02:22:58Z is after the latest witnessed instant (2026-09-08T13:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-09T02:22:58Z","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` 2026-09-09T02:22:58Z: the nearest pin's natural window is [2026-09-09T03:00:53+00:00, 2026-09-09T04:00:53+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"weather_google","resolved_at":"2026-09-09T02:22:58Z","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":4900006413,"value":{"temperature_c_idw":25.058,"rainfall_mm_24h_idw":3.1571,"humidity_pct_idw":79.5271,"wind_speed_kmph_idw":13.21},"valid_time":{"kind":"valid_time","requested":"2026-09-09T02:22:58Z","served_window_start_utc":"2026-09-09T02:06:42+00:00","served_window_end_utc":"2026-09-09T03:06:42+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":2021,"pin_sha256":"dd0c7ffa42b09d8cddb13f5bf760caa4bda1329213ba92198e2d978ab2b8363d","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T03:06:42+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}}]}