Dr. Chen Filed This Report. C. Morrison Submitted A Suggested Revision. You Can Read Both.
ORC-2025-112. Vehicle: ORC-V4. Target object: LEO 527km, circular, 84.2° inclination. Object mass: 412kg. Attitude state: stable, nadir-pointing, 0.1 rpm residual tumble. Mission type: S-01 standard retrieval. Commissioning client: [REDACTED per standard terms].
Object characterisation confirmed against TLE data sourced 72 hours pre-deployment. No discrepancies identified.
Approach commenced day 9. Proximity lock achieved at 14m. Attitude at lock: stable, 0.09 rpm residual tumble. Arrest manoeuvre initiated 14:22 UTC. Tumble arrest completed in 1hr 44min. Capture initiated 16:06 UTC. Capture confirmed 16:38 UTC. Secure bay seal confirmed 16:44 UTC.
Approach was nominal. Capture was nominal. No anomalies were recorded during the approach, arrest, or capture phases. All parameters within expected ranges.
P. Patel conducted the approach and arrest. P. Patel’s execution was consistent with standard operational procedure. The arrest time of 1hr 44min is within the normal range for an object with 0.1 rpm residual tumble at this mass.
Deorbit burn executed 04 March 2025, 08:14 UTC. Burn duration: 3min 41sec. Delta-v: 84.3 m/s. Re-entry confirmed 04 March 2025, 09:52 UTC, South Pacific uninhabited zone, latitude [REDACTED]. Re-entry duration: approximately 98 seconds from 120km to surface impact.
Burn parameters were calculated to achieve the target re-entry corridor within ±0.4° tolerance. Actual re-entry was within ±0.2°. This is within tolerance.
Mission ORC-2025-112: completed successfully. Object retrieved. Object deorbited. Re-entry confirmed. All parameters within specification. Duration: 18 days from deployment to re-entry confirmation. No anomalies. No incidents. Full chain-of-custody documentation to follow within 14 working days.
I note that C. Morrison is on leave and that this report was filed in C. Morrison’s absence. I have attempted to follow the standard report structure. M. Hargreaves has reviewed a draft. M. Hargreaves suggested the word “successfully.” I have included it.
The mission was routine. This is not a criticism. Routine is the intended state.
ORC-2025-112. Vehicle: ORC-V4 “Patience.” ACCEPTED Target object: LEO 527km, circular orbit, inclination 84.2°. Object mass: 412kg. Attitude state: stable, nadir-pointing, minor residual tumble. DECLINED Mission type: S-01 Standard Retrieval. Commissioning client: [REDACTED per standard terms].
Object characterisation confirmed against TLE data sourced 72 hours before deployment. No discrepancies identified. The characterisation process worked exactly as it should, which C. Morrison would like noted because it doesn’t always.
DR. CHEN · NOTE ON SUGGESTION 2 (DECLINED) C. Morrison suggested changing “0.1 rpm residual tumble” to “minor residual tumble.” The value 0.1 rpm is operationally significant — it determines the arrest protocol and the approach timing. “Minor” is subjective and not operationally useful. I have retained the numerical value. This is not a criticism of C. Morrison. C. Morrison writes for a different audience than I do.
Approach commenced on day 9. P. Patel guided Patience to proximity lock at 14 metres. The object was tumbling slowly — residual, predictable, manageable. ACCEPTED P. Patel arrested the tumble in 1 hour and 44 minutes, which is well within normal parameters for an object of this mass and rotation rate. Capture was confirmed at 16:38 UTC, bay seal at 16:44 UTC.
The approach and capture were clean and professional. DECLINED There were no anomalies. All parameters fell within expected ranges throughout the approach, arrest, and capture sequence.
P. Patel’s performance during this mission was consistent with P. Patel’s performance during every mission, which is to say it was excellent and conducted without unnecessary comment in any direction. DECLINED
DR. CHEN · NOTE ON SUGGESTIONS 5–6 (DECLINED) Suggestion 5 added the phrase “clean and professional” to describe the approach. This is evaluative language and adds no operational information. I have declined it. Suggestion 6 added a characterisation of P. Patel as “excellent.” P. Patel’s performance was, as C. Morrison notes, consistent with her established standard. I do not believe this report is the appropriate place to say so. I have noted it here, in this footnote, which C. Morrison suggested adding. This is, I accept, the same information in a different location. C. Morrison has pointed this out. I am reflecting on it.
Deorbit burn executed 04 March 2025, 08:14 UTC. Duration 3 minutes 41 seconds. Delta-v 84.3 m/s. Re-entry confirmed 09:52 UTC, South Pacific. The burn hit its corridor to within half the tolerance margin, which C. Morrison would like to describe as “an exceptionally precise burn” and which Dr. Chen has declined to so describe. DECLINED
Re-entry was confirmed. The object is no longer in orbit. DECLINED This is the outcome that was sought.
Suggestion 8 proposed adding “which is gratifying” after “the object is no longer in orbit.” The object not being in orbit is the intended outcome of the mission. I see no reason to describe the intended outcome as gratifying. C. Morrison said it is nice to acknowledge when things go well. I said the acknowledgement is implicit in the word “successfully.” This exchange continued for eleven minutes. I do not regret it. It was interesting.
Mission ORC-2025-112: completed successfully. Object retrieved. Object deorbited. Re-entry confirmed. 18 days. No anomalies. Full documentation to follow within 14 working days. DECLINED
This report was filed by Dr. Chen in C. Morrison’s absence. C. Morrison read it on return and submitted 11 suggested revisions. Dr. Chen accepted 4. This paragraph was C. Morrison’s suggestion and was accepted without amendment, because Dr. Chen agreed it should be noted. ACCEPTED
The mission was routine. This is not a criticism. Routine is the intended state. Dr. Chen wrote this sentence himself. C. Morrison suggested removing it. Dr. Chen declined. DECLINED It stays.
DR. CHEN · NOTE ON SUGGESTION 10 (ACCEPTED) C. Morrison suggested this paragraph to acknowledge the collaborative nature of the filing. I agreed it should be noted. It is noted.
DR. CHEN · NOTE ON SUGGESTION 11 (DECLINED) C. Morrison suggested removing the final sentence — “routine is the intended state” — on the grounds that it might be read as dismissive of the mission. It is not dismissive. It is accurate. The goal of every ORC mission is a routine outcome. A routine outcome means everything worked. “Routine” is the highest operational compliment I am able to offer. C. Morrison said he understood but still thought it read oddly. We agreed to disagree. The sentence stays.