ACCORD • Aim: Provide a mechanism for communicating the efficacy of

current debris mitigation practices & identifying opportunities for strengthening European capability

• Combining capability and capacity indicators within anEnvironmental Impact Rating System

Alignment of Capability and Capacityfor the Objective of Reducing Debris

Communicating the Effectiveness of Space Debris Mitigation Practices The ACCORD Environmental Impact Rating SystemSimon George1

Benjamin Schwarz1, Hugh Lewis1, Hedley

Stokes2

1 2Clean Space WorkshopTuesday 29th October 2013

www.fp7-accord.eu/rating

Environmental Impact Rating SystemInteractive tool to evaluate how design & operation of a prospective spacecraft may impact the space debris environment

– Free, voluntary industry tool for spacecraft designers and operators

– Final system will be implemented in a web-tool and hosted client-side to ensure privacy

Communicate how mitigation measures and good design practices can improve environmental impactAssist spacecraft designers in achieving

compliance with debris mitigation measures set out in IADC guidelines & ISO standards

Clean Space WorkshopTuesday 29th October 2013

User-Specified Inputs:

Construction of Rating System

Environmental Impact Rating

Orbit DataAltitude

Inclination

Mitigation Measures

Used

How Mitigation

Measures are Implemented

Quantify impact of a prospective spacecraft on the space debris environment

A single ‘score’ for a prospective spacecraft

– On-Orbit Mass

– Perigee Altitude

– Orbital Inclination

– Mitigation MeasuresImplemented

– How Mitigation Measuresare Implemented in Design

Data derived from ACCORD industry survey of implementation of debris

mitigation measures www.fp7-accord.eu/survey

Clean Space WorkshopTuesday 29th October 2013

“Health” ~

Assess the “health” of the space environment with respect to 2 ‘goals’:

1. Widespread Implementation of Mitigation Measures

2. “Benign” Space Debris Environment

Space “Health” Index

Leads to a measure of a “healthy” space environment to be used in the impact rating calculation

A measure of the long-term sustainability of outer space activities

Clean Space WorkshopTuesday 29th October 2013

A measure of how well the goal has been realised

For each goal, the index calculates a score (out of 100)

Rating Parameters:

1. Debris score for the prescribedorbital region (how “crowded” the region is)

2. The capacity of appliedmitigation measures to limit the generation of new debris (from DAMAGE)

3. How the prospective spacecraftaffects the “health” index in thegiven orbital region (re-calculate “health” index)

2. Environmental Impact Rating

Environmental Impact Rating

Defines LEO

Region

Orbit DataAltitude

Inclination

Mitigation Measures

Used

How Mitigation

Measures are Implemented

UserInputs

Crowding of Debris in

LEO Region

Capacity of Mitigation to Limit Future

Debris

Modification to “Health”

Index for LEO Region

“Health”Index

All scores expressed out of 100

Weighted average,giving preference to capacity score

Final Rating

Inputs:

Mass: 1000kgAltitude: 795kmInclination: 98

Applied Mitigation Measures:

- Collision Avoidance- Passivation- Avoid Accidental Break-Up

+ Post-Mission Disposal

Representative ‘Certificate’

Generates Client-Side PDF

Industry Engagement

Astronautics Research Group

Further Information:www.fp7-accord.eu/rating

Dr. Hugh LewisContact: hglewis@soton.ac.uk

• Invitation to test prototype rating system and provide feedback on its operation & design [exhibition area, or contact Dr. Hugh Lewis privately]

• Final system will be implemented in a web-tool and hosted client-side to ensure privacy

• All comments and feedback are welcomed

See also: ACCORD poster in exhibition area

Funding provided by the European Union Framework 7 Programme (Project No. 262824). Thanks to Carsten Wiedemann (TU Braunschweig), Adam White (University of Southampton), Richard Tremayne-Smith, and Holger Krag (ESA Space Debris Office)

Clean Space WorkshopTuesday 29th October 2013