{ "jobid": "job:bd4c1077-68c4-4e16-9ed8-122f31912c46-user:12345-user@example.com-bot:gemini_notebook", "email": "user@example.com", "type": "table", "status": "completed", "notebook": "user:12345-user@example.com-notebook:62600bab-4082-4ee6-8fc3-955cee0c69cf", "artifact": "user:12345-user@example.com-artifact:62600bab-4082-4ee6-8fc3-955cee0c69cf:3d9344ac-bc4b-4734-8c76-0d58279567cc", "created_at": "2026-09-29T05:53:06.323Z", "request": { "notebook": "user:12345-user@example.com-notebook:62600bab-4082-4ee6-8fc3-955cee0c69cf", "type": "table", "instructions": "One row per program alarm or anomaly during the descent: time, alarm or event, cause, what the crew or Mission Control did." }, "completed_at": "2026-09-29T05:53:38.651Z", "result": { "title": "Apollo 11 Descent Alarms and Anomalies", "table": [ [ "Time", "Alarm or event", "Cause", "What the crew or Mission Control did", "Source" ], [ "Five minutes into the descent burn / MET 102:38:00–102:38:22 / PDI + 316 seconds", "1202 program alarm", "Computer overload (Executive overflow: no core sets available). High-frequency counter increment requests from the rendezvous radar ECDUs, caused by an electrical phasing mismatch (800 Hz vs 400 Hz), stole 13% to 15% of computer CPU cycles while running V16N68.", "Buzz Aldrin checked the alarm code using Verb 90 Noun 50 (and Verb 05 Noun 09 at PDI + 322 seconds). Computer engineer Jack Garman checked his reference sheet and told Guidance Officer Steve Bales it was safe to continue. Bales verified telemetry/navigation, and CapCom Charlie Duke transmitted \"Go\" to the crew. The LGC software automatically eliminated lower-priority tasks to maintain critical guidance tasks. Crew hit Key Release at PDI + 380 seconds.", "[1] [2] [3] [4] [5] [6] [7]" ], [ "MET 102:36:55", "Slow spacecraft rotation rate during pitch-over/spin maneuver", "Autopilot rate switch was set at 5 deg/sec.", "Neil Armstrong switched the autopilot rate switch from 5 deg/sec to 25 deg/sec.", "[4]" ], [ "As descent began / Not in source", "Overshooting the Planned Landing Target / Downrange Position Offset (Trajectory shifted 3,000 ft downrange from target site)", "Residual pressure in the docking tunnel during separation, lunar gravitational anomalies (mascons), and accumulated state vector propagation errors or unmodeled forces during earlier maneuvers.", "The crew monitored their position closely, maintained composure, and prepared to adapt to landing further west than planned. Armstrong later engaged manual rate-of-descent mode to fly clear of rocks.", "[5] [6]" ], [ "During descent", "1202 Program Alarm shortly after Verb 57 was entered", "Computer overload (Executive alarm) due to CPU cycle stealing by the rendezvous radar interface combined with monitoring displays.", "Aldrin checked the alarm code using Verb 90 Noun 50. Mission Control issued a \"go\".", "[4]" ], [ "PDI + 552 seconds / MET 102:42:17", "1201 program alarm", "Computer overload (Executive overflow: no VAC areas available due to multiple scheduling of jobs like SERVICER). Caused by high-frequency counter increment requests from the rendezvous radar interface stealing CPU cycles during P64.", "Mission Control called a \"go\". Software restart automatically cleared dispensable jobs and maintained required guidance tasks while the crew focused inside the cockpit.", "[1] [2] [3] [4] [6] [7]" ], [ "PDI + 578 seconds / MET 102:42:41", "1202 program alarm", "Computer overload (Executive overflow: no core sets available) caused by high-frequency counter increment requests from the rendezvous radar interface stealing CPU cycles during P64.", "Mission Control called a \"go\". Software restart automatically executed to clean out old unfinished jobs.", "[3] [4]" ], [ "PDI + 594 seconds / MET 102:42:57 (at 770 ft altitude)", "1202 program alarm", "Computer overload (Executive overflow: no core sets available) caused by high-frequency counter increment requests from the rendezvous radar interface stealing CPU cycles during P64.", "Mission Control called a \"go\". Software restart automatically executed to clean out old unfinished jobs. Shortly after, Armstrong switched autopilot mode to ATT HOLD to stop automated redesignations and avoid further alarms.", "[3] [4]" ], [ "102:41:53 GET / Near landing approach (250 ft to 100 ft above surface)", "Guidance system targeting a boulder-strewn area near West Crater / Overrode automatic landing program P64 and selected P66 mode", "LM guidance computer targeted West Crater boulder field due to landing system targeting parameters and high horizontal velocity.", "Neil Armstrong took semi-automatic manual control (P66 mode), adjusting pitch and roll to pilot Eagle past the crater and boulder field to find a clear level patch of ground, while Buzz Aldrin continuously called out navigation and altitude data.", "[1] [2] [5] [6] [7]" ], [ "100 feet above the surface / Final descent", "Premature low fuel warning / Propellant Depletion Risk / Blinding Lunar Dust", "Propellant sloshing during P66 manual translation uncovered fuel sensor early. Engine exhaust kicked up lunar dust obscuring the surface.", "Armstrong used large rocks projecting above the dust to gauge horizontal speed, cleared a smaller crater, and landed with about 25 to 50 seconds of fuel remaining (90 seconds remaining when warning issued). Mission Control initiated a mandatory countdown with \"60 seconds\" and \"30 seconds\" warning calls from CapCom.", "[1] [2] [5] [6]" ], [ "Touchdown / Contact light call", "Delayed Engine Shutdown", "In the intensity of the moment, Armstrong delayed shutting down the engine for about three seconds after contact light.", "The lander settled safely; the crew ran post-landing checklists to secure the engine, and Armstrong announced touchdown.", "[6]" ], [ "Not in source", "Code 500", "The computer thought the landing radar antenna was in the wrong position (caused by misbehaving discrete signals).", "The crew saw switches were in the right positions, cycled them anyway, and the warning cleared.", "[4]" ], [ "Not in source", "Telemetry Disruption / Intermittent Loss of Signal (LOS)", "Vehicle pitch/yaw attitude obscured line-of-sight for S-Band High Gain Antenna.", "Switched to omni-directional antennas and CapCom requested vehicle re-orientation.", "[5]" ] ] } }