{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":487,"cluster_id":4870000006,"lat":19.595,"lng":73.685},"signals":[{"signal":"temperature","resolved_at":"2026-07-15T12:02:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":487,"cluster_id":4870000006,"value":{"temperature_c_idw":30.7969},"valid_time":{"kind":"valid_time","requested":"2026-07-15T12:02:50Z","served_window_start_utc":"2026-07-15T11:16:43+00:00","served_window_end_utc":"2026-07-15T12:16:43+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":963,"pin_sha256":"53819f7fce42d876b59705f79cb6d605ba6418671a76c2a9ba7b50f6be178262","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-15T12:16:43+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":"2026-07-15T12:02:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":487,"cluster_id":4870000006,"value":{"rainfall_mm_24h_idw":0.042},"valid_time":{"kind":"valid_time","requested":"2026-07-15T12:02:50Z","served_window_start_utc":"2026-07-15T11:16:43+00:00","served_window_end_utc":"2026-07-15T12:16:43+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":963,"pin_sha256":"53819f7fce42d876b59705f79cb6d605ba6418671a76c2a9ba7b50f6be178262","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-15T12:16:43+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":"2026-07-15T12:02:50Z","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` 2026-07-15T12:02:50Z is after the latest witnessed instant (2026-07-13T18:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-15T12:02:50Z","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` 2026-07-15T12:02:50Z: the nearest pin's natural window is [2026-07-15T12:04:00+00:00, 2026-07-15T13:04:00+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"weather_google","resolved_at":"2026-07-15T12:02:50Z","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":4870000006,"value":{"temperature_c_idw":26.2411,"rainfall_mm_24h_idw":4.043,"humidity_pct_idw":79.3113,"wind_speed_kmph_idw":18.5577},"valid_time":{"kind":"valid_time","requested":"2026-07-15T12:02:50Z","served_window_start_utc":"2026-07-15T11:06:48+00:00","served_window_end_utc":"2026-07-15T12:06:48+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":686,"pin_sha256":"29e6cafbfd34db29af78c65e35c38875cf8e1088bcd090179c79e5df2a6fed56","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-15T12:06:48+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}}]}