How do I install the Rendezvous Phasing skill?

Run npx skillmds@latest add ashfordeou/rendezvous-phasing in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Rendezvous Phasing safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Rendezvous Phasing?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Rendezvous Phasing free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under Apache-2.

Who published Rendezvous Phasing?

ashfordeOU (@ashfordeou) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Rendezvous Phasing by ashfordeou — Agent Skill

Name: Rendezvous Phasing
Author: ashfordeOU

Rendezvous Phasing

Use when you must plan an orbital rendezvous phasing maneuver: compute the drift rate needed to cover a phase angle in a transfer time, size the phasing delta-v around a circular orbit, and check the closing rate against the allowed value. Produces the drift rate, the delta-v estimate, and the closing rate verdict that gate the maneuver plan. Trigger: rendezvous, phasing orbit, closing rate, orbital maneuver, delta-v, chase.

ashfordeOU ce08c96 3 files · 6.5 KB Updated Sep 17, 2026

File contents

Orbital Rendezvous Phasing (gnc-autonomy/space/rendezvous-phasing)

Use when the task is rendezvous phasing: drift rate, phasing delta-v, and closing rate checks for an orbital chase maneuver.

Domain quick reference

Phasing: a chaser behind the target lowers its orbit to speed up (higher mean motion), drifts through the phase angle, then returns to the target altitude.
Required drift rate is the phase angle divided by the transfer time.
Delta-v scales with the mean motion and the semi-major axis change of the phasing orbit.
The closing rate during the final approach must stay within the allowed value.

Workflow

Collect the phase angle, transfer time, and orbit radius.
Compute the drift rate with drift_rate_required.
Size the phasing delta-v with delta_v_for_drift.
Check the closing rate with closing_rate_ok.
Gate the maneuver plan on the verdicts.

Pitfalls

Confusing lead and trail phase geometry.
Sizing the phasing burn without checking the closing rate.
Using transfer time of zero in the drift computation.

Behavior contract (gate 3)

The drift, delta-v, and closing rate logic is exercised by the gate 3 contract test: scripts/test_rendezvous_phasing.py against scripts/rendezvous_phasing_logic.py (stdlib unittest, offline). Run: python3 scripts/test_rendezvous_phasing.py

Compliance

Standards referenced, not reproduced: ECSS-E-ST-10-03C text is copyright ESA; the phasing here is common orbital mechanics, summary-only per standards-map.yaml.
compliance: STANDARDS-REF, gated: false.

---name: rendezvous-phasingdescription: Use when you must plan an orbital rendezvous phasing maneuver: compute the drift rate needed to cover a phase angle in a transfer time, size the phasing delta-v around a circular orbit, and check the closing rate against the allowed value. Produces the drift rate, the delta-v estimate, and the closing rate verdict that gate the maneuver plan. Trigger: rendezvous, phasing orbit, closing rate, orbital maneuver, delta-v, chase.license: Apache-2.0---# Orbital Rendezvous Phasing (gnc-autonomy/space/rendezvous-phasing)Use when the task is rendezvous phasing: drift rate, phasingdelta-v, and closing rate checks for an orbital chase maneuver.## Domain quick reference- Phasing: a chaser behind the target lowers its orbit to speed up (higher mean motion), drifts through the phase angle, then returns to the target altitude.- Required drift rate is the phase angle divided by the transfer time.- Delta-v scales with the mean motion and the semi-major axis change of the phasing orbit.- The closing rate during the final approach must stay within the allowed value.## Workflow1. Collect the phase angle, transfer time, and orbit radius.2. Compute the drift rate with drift_rate_required.3. Size the phasing delta-v with delta_v_for_drift.4. Check the closing rate with closing_rate_ok.5. Gate the maneuver plan on the verdicts.## Pitfalls- Confusing lead and trail phase geometry.- Sizing the phasing burn without checking the closing rate.- Using transfer time of zero in the drift computation.## Behavior contract (gate 3)The drift, delta-v, and closing rate logic is exercised by the gate3 contract test: scripts/test_rendezvous_phasing.py againstscripts/rendezvous_phasing_logic.py (stdlib unittest, offline).Run:python3 scripts/test_rendezvous_phasing.py## Compliance- Standards referenced, not reproduced: ECSS-E-ST-10-03C text is copyright ESA; the phasing here is common orbital mechanics, summary-only per standards-map.yaml.- compliance: STANDARDS-REF, gated: false.

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