Fragmentation Data Message Alexandru Mancas CCSDS Fall Meetings - - PowerPoint PPT Presentation

ESA UNCLASSIFIED - For Official Use

Fragmentation Data Message

Alexandru Mancas CCSDS Fall Meetings 2019, Darmstadt, Germany

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 2

Agenda

• 1. Short overview of the concept paper
• 2. Developments since the concept paper was distributed
• 3. How it ties up with the Navigation Hybrid Message concept
• 4. Way forward

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 3

INTRODUCTION

Fragmentation Data Message

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 4

Introduction

• original concept developed together with RDM in mid-2015
• concept paper drafted at the same time as the RDM concept paper (found on my computer

thanks to Spotlight; not sure if shared with WG)

• contents were based on the output of the prototype ESA SST Fragmentation Analysis System

(FAS)

• re-drafted in mid-/late-2019 and distributed to the working group
• since 2015:
• different perspective on fragmentation events from ESA Space Debris Office activities
• NDM progress, including RDM, OCM, and OCM (in development)
• RDM development and contents led to some doubts about the original FDM content
• thoughts developed on how the FDM ties in with the hybrid message concept

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 5

CONCEPT PAPER

Fragmentation Data Message

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 6

Basic ideas

• written mainly for a stand-alone message, same as the CDM and RDM
• KVN and XML versions, KVN mock example in the paper
• did not want to tie in to a hybrid message in the proposal, as that idea was not proposed in a

concept paper yet

• possibility left in the proposal for other possible approaches to take with the message, such as

creating an XML-only message re-using structures from existing XML NDMs

• justification for the need for such a message (large number of fragments in orbit generated in

the last two decades)

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 7

Absolute number of fragments generated per event cause Large number of deliberate fragments in the 2005-2010 bin

(a) Absolute number of resulting fragments per event cause. (b) Relative number of resulting fragments per event cause.

Figure 5.4: Historical trend of numbers of fragments produced by fragmentation events.

Page 54/77 ESA’s Annual Space Environment Report Issue Date 24 April 2019 Ref GEN-DB-LOG-00271-OPS-SD

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 8

Proposed content

• contents proposed for a stand-alone message
• header, metadata, and data sections
• metadata: fragmentation id, event status (detected/simulated), event type, epoch, number of

fragment clouds detected + optional keywords

• data section: 2 blocks, one per fragmentation cloud
• KVN with general information: progenitor and physical properties, granular control
• ver number of fragments in the cloud (catalogued, in-orbit, tracked, etc), distribution

in orbital elements, epoch for the above’

• (optional) data lines with information about each fragment in the cloud: IDs, epoch of

detection and assignment to the cloud, etc

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 9

RECENT DEVELOPMENTS

Fragmentation Data Message

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 10

Recent developments

• n
• nly on
• ne since th

the pa pape per wa was distr tribu bute ted: : som

• me inte

terest t in pr prototy

• totypi

ping expr pressed by by 1. ESA (obviously) generate+process FDMs

• 2. DLR/GSOC read/process FDMs

3. AGI (tentative), hoping for generate+process FDMs

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 11

HYBRID MESSAGE CONNECTION

Fragmentation Data Message

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 12

Hybrid message

• the concept paper follows the same approach with the CDM/RDM: some overlap with existing

messages (OPM mainly) and enough information to get some analysis done

• especially for fragmentation events, more information could be exchanged, such as:
• state vectors or ephemerides + estimated physical properties for each fragment (to re-

use OCM/OEM/OPM stuff?)

• covariance information for each fragment
• tracking data for each fragment
• given the above, would it make sense to me to think of the FDM (not as proposed in the

concept paper) but as a first instantiation of the hybrid message? ie we could start defining blocks (orbit, physical properties, tracking, etc), and the FDM ‘standard’ would just specify how to assemble them

ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 13

WAY FORWARD

Fragmentation Data Message