Projects

Overview
Project Title	Robust Compression of Fixed-Length Housekeeping Data
Approval	Approved
Document Number	124.0
Charter	5.03 Data Compression Working Group
Document Type	Blue
Description of Document	The Recommended standard defines a lossless data compressor suitable for low-complexity onboard compression of fixed-length data packets, as might commonly arise in spacecraft housekeeping data. Since housekeeping data is considered to be mission critical, the compressor shall include the option to vary the robustness of the compression system in different packet loss/corruption scenarios.
Applicable Patents	Patent issues have been identified but appropriate ISO forms have not yet been signed. The WG requests a waiver to begin work on this project. (justify in comments). ISO forms must be secured prior to the first formal Agency review.
Patent Comments	There is a patent held by ESA (POCKET+) for which signature of the ISO Form is in progress and CMC will be informed promptly when available. No other patent is known to the WG.
Survey of Similar Standards Documents or Projects Undertaken in Other Bodies and elsewhere in CCSDS	Despite there are several data compression standards, there is none dealing specifically with Fixed-Length Housekeeping Data. Existing standards CCSDS-121.0-B and CCSDS-122.0-B define data compression approaches that are not optimized to deal with the special structure of housekeeping data.
Resources
Book Editor	ESA
Book Editor Resources	3 WM
Prototype 1	ESA
Prototype 1 Resources	6 WM
Prototype 2	CNES
Prototype 2 Resources	6 WM
Prototype 3	Not Required
Prototype 3 Resources	Not Required
Contribute	CNES, ESA
Monitor Only	NASA
Resource Comments	Resources are over a planned calendar period of about two years.

Schedule

Legend for Schedule Milestones = Required for Orange Books = Required for Green Books = Required for Magenta Books = Required for Blue Books Note - Red Books are Draft Blue/Magenta Books Schedule Milestones	Original Completion Date (Date in M/D/YYYY format.)	Estimated Completion Date (Date in M/D/YYYY format.)	Actual Completion Date (Date in M/D/YYYY format.)	Comments (Date in M/D/YYYY format.)
Project Approved	1/30/2018	1/30/2018	12/18/2017	CMC-P-2017-11-009
Project Start Date	4/9/2018	4/9/2018	4/11/2018
Internal WG Review
First Draft Circulated to WG	4/9/2018	4/9/2018	9/18/2018
First Draft Comments Due	4/15/2018	4/15/2018	10/17/2018	At Fall 2018 Meeting
Second draft circulated to WG	10/1/2018	10/1/2018	4/15/2019	Spring 2019 Meeting
Second Draft Comments Due	11/1/2018	11/1/2018	12/18/2020
Final WB Submitted to AD for Further Processing	12/1/2018	12/1/2018	9/1/2021
External Milestones
Secretariat Document Processing	1/30/2019	11/30/2021	11/30/2021
First Agency Review	3/30/2019	12/30/2021	12/30/2021
RID Resolution	5/30/2019	2/15/2022	3/30/2021
Secretariat Document Processing 2	6/30/2019	4/30/2022	4/30/2022
Final Agency Review	9/30/2019	6/30/2022	6/30/2022
RID Resolution	11/30/2019	8/30/2022	8/30/2022
First Prototype Development	11/30/2019	10/30/2021	3/30/2022	ESA prototype
Second Prototype Development	11/30/2019	10/30/2021	3/30/2022	CNES Prototype
CMC Approval	5/30/2020	9/30/2022	2/28/2023	CMC approval for publication
Total Time to Complete (in months)	25	53