Source: https://guthlabs.ai/docs/instrument-workflows/orbital-mission/

instrument chain / verified-workflow-definition

# Orbital Mission Planner

Plan a full orbital transfer: pick orbits, compute velocities and periods, cost the maneuvers, size the propellant.

Status: **observed**Lifecycle: **verified-workflow-definition**

## Goal

Plan a full orbital transfer: pick orbits, compute velocities and periods, cost the maneuvers, size the propellant.

## Instrument chain

- 01

**[Orbital Period (Kepler's 3rd Law)](<https://guthlabs.ai/docs/instruments/orbital-period-kepler-s-3rd-law/>)**

orbit radius → period

VERIFIED

- 02

**[Circular Orbital Velocity](<https://guthlabs.ai/docs/instruments/circular-orbital-velocity/>)**

radius → v_circ

VERIFIED

- 03

**[Vis-Viva Equation Solver](<https://guthlabs.ai/docs/instruments/vis-viva-equation-solver/>)**

r,a → speed anywhere on ellipse

VERIFIED

- 04

**[Hohmann Transfer Orbit Calculator](<https://guthlabs.ai/docs/instruments/hohmann-transfer-orbit-calculator/>)**

r1,r2 → Δv1,Δv2,transfer time

VERIFIED

- 05

**[Orbital Inclination Plane-Change Δv](<https://guthlabs.ai/docs/instruments/orbital-inclination-plane-change-v/>)**

v,Δi → Δv_plane

VERIFIED

- 06

**[Orbital Eccentricity/Apsides Solver](<https://guthlabs.ai/docs/instruments/orbital-eccentricity-apsides-solver/>)**

a,e ⇄ apoapsis/periapsis

VERIFIED

- 07

**[Rocket Equation (Tsiolkovsky)](<https://guthlabs.ai/docs/instruments/rocket-equation-tsiolkovsky/>)**

total Δv,Isp → propellant mass

VERIFIED

- 08

**[Escape Velocity](<https://guthlabs.ai/docs/instruments/escape-velocity/>)**

departure check

VERIFIED

## Handoffs and cross-checks

radius → v/T → Hohmann Δv + plane Δv summed → Tsiolkovsky. Cross-check: vis-viva at r1 on transfer ellipse must equal v_circ(r1)+Δv1.

## PointGuard stance

Drive the chain left-to-right; before propellant, re-derive Δv1 via vis-viva as an independent check — refuse to proceed if they disagree beyond 0.1%.

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `INSTRUMENT_COMBOS.json`

- `VERIFIED_LEDGER.json`