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The CCSDS Collaborative Work Environment (CWE) > Space Link Services Area (SLS)

SLS Area

OVERVIEW - SPACE LINK SERVICES AREA (SLS)
Welcome to the Space Link Services (SLS) Collaborative Work Environment.

The Space Link services area is in charge, within CCSDS, to develop efficient space link communications systems common to all participating agencies. A space link interconnects a spacecraft with its ground support system or with another spacecraft. Agencies' new generations of space missions require telecommand and telemetry capabilities beyond current technologies. These new needs are for higher data rates, better link performances, more performing ranging systems, together with lower cost, mass and power and higher security.

More specifically, SLS area concentrates on layers 1 & 2 (of OSI protocol stack), namely : RF & modulation, channel coding and data link layer, for both long-haul (e.g.: spacecraft to ground) and proximity links (e.g.: orbiter to lander). Two additional functions are also covered by the SLS area : data compression for end to end data transfer optimization, and ranging for accurate orbit determination.

The area is composed of specialized working group whose objective is to develop specific recommendations. One recommendation will typically cover one OSI layer or sub-layer. This layering of recommendations maximizes flexibility and interoperability with other commercial protocols (e.g. : TCP/IP).

PUBLICATIONS
SLS Area Approved Publications can be accessed by clicking here. All CCSDS Approved Publications can be accessed by clicking here.

POINTS OF CONTACT

Gian Paolo CalzolariArea Director: Gian Paolo Calzolari
ESA/European Space Agency
ESOC - OPS-OT
Robert Bosch Str. 5
64293 Darmstadt
Germany

Telephone: +49 6151 90 2913
FAX: +49 6151 90 2178
E-mail: Gian.Paolo.Calzolari@esa.int
Bio: Click Here

Gilles MouryDeputy Area Director: Gilles Moury
CNES/Centre National d'Etudes Spatiales
18, Avenue Edouard Belin
31401 Toulouse Cedex 4
France

Telephone: +33 5 61 27 37 90
FAX: +33 5 61 28 19 96
E-mail: Gilles.Moury@cnes.fr
Bio: Click Here

MAILING LIST
sls@mailman.ccsds.org
Click here to join mail list
Click here to view archives

SLS-RFM

OVERVIEW - RF MODULATION WORKING GROUP (SLS-RFM)
Welcome to the RF Modulation Working Group Collaborative Work Environment.  The RF Modulation Working Group (SLS-RFM) falls under the Space Link Services (SLS) Areas of the CCSDS.

Agencies’ new generations of space missions require telecommand and telemetry capabilities beyond current technologies to interconnect a spacecraft with its ground support system, or with another spacecraft. These new needs are for higher data rates, better link performances, more performing ranging systems, together with lower cost, mass and power and higher security.

POINTS OF CONTACT

Enrico VassalloChair: Enrico Vassallo
ESA/European Space Operations Centre
Robert Bosch Strasse 5
D-64293 Darmstadt
Germany

Telephone:+49 6151 902 585
FAX: +49 6151 903 046
E-mail: Enrico.Vassallo@esa.int

Dennis LeeDeputy Chair: Dennis Lee
NASA/Jet Propulsion Laboratory
9800 Oak Grove Dr
Pasadena, CA 91109
Telephone: (818) 354-6908
E-mail: Dennis.K.Lee@jpl.nasa.gov

MAILING LIST
sls-rfm@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

SLS-C&S

OVERVIEW - SPACE LINK CODING & SYNCHRONIZATION WORKING GROUP (SLS-C&S)
Welcome to the Space Link Coding & Synchronization Working Group Collaborative Work Environment.  The Space Link Coding & Synchronization Working Group (SLS-C&S) falls under the Space Link Services (SLS) Areas of the CCSDS.

Agencies’ new generations of space missions require telecommand and telemetry capabilities beyond current technologies to interconnect a spacecraft with its ground support system, or with another spacecraft. These new needs are for higher data rates, better link performances, together with lower cost, mass and power and higher security.

The wide range of environment (space-Earth or space-space, near Earth congested bands and deep space link operations in extreme conditions of SNR, links dependent of atmospheric conditions in the new high frequency bands, optical links) requires coding systems with different levels of power efficiency and bandwidth efficiency, or different levels of link reliability or delivered data quality;

This work will concentrate on updating the existing set of Channel Coding Blue Books to incorporate recommended coding scheme for new bandwidth efficient codes with low complexity. The update work includes also the extraction of the coding layer out of CCSDS 211.0-B Prox-1 Protocol.

POINTS OF CONTACT Massimo BertinelliChair: Massimo Bertinelli
ESA/European Space Agency
ESTEC
Keplerlaan 1
2200AG Noordwijk
Netherland

Telephone: +31 715653435
FAX: +31 715654596 E-mail: Massimo.Bertinelli@esa.int

Ken AndrewsDeputy Chair: Kenneth Andrews
NASA/Propulsion Laboratory
Mail stop 238-420
4800 Oak Grove Drive
Pasadena, CA 91109

Telephone: NA
E-mail: Kenneth.S.Andrews@jpl.nasa.gov

MAILING LIST
sls-cc@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

SLS-MHDC

OVERVIEW - MULTISPECRAL HYPERSPECTRAL DATA COMPRESSION WORKING GROUP (SLS-MHDC)
Welcome to the Multispectral Hyperspectral Data Compression Working Group Collaborative Work Environment. The Hyperspectral Hyperspectral Data Compression Working Group (SLS-MHDC) falls under the Space Link Services (SLS) Areas of the CCSDS.

On-board data compression is needed to make full use of limited spacecraft resources like data storage and downlink capacity. Multispectral & hyperspectral images can occupy enormous data volumes, and so compression algorithms specifically designed to exploit the three-dimensional structure of such images can provide tremendous benefit to space missions.

The Multispectral & Hyperspectral Data Compression working group has developed the CCSDS-123.0-B-1 standard, a state-of-the-art low-complexity lossless compressor.

The working group is now working on extending the CCSDS-122.0-B-1 (two-dimensional) image compressor by adding a spectral transform stage to provide multispectral and hyperspectral (three-dimensional) image compression.

POINTS OF CONTACT

Aaron KielyChair: Aaron Kiely
NASA/Jet Propulsion Laboratory
Mail Stop 238-420
4800 Oak Grove Drive
Pasadena, CA 91109-8099

Telephone: +1 818 393-9048
FAX: +1 818 354-6825
E-mail: Aaron.B.Kiely@jpl.nasa.gov

Englin (Mark) WongDeputy Chair: Englin (Mark) Wong
NASA/Goddard Space Flight Center
Code 564 / Instrument Electronics Development Branch
8800 Greenbelt Road Greenbelt, MD 20771

Telephone: NA
E-mail: mark.wong@nasa.gov

MAILING LIST
sls-mhdc@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

SLS-SLP

OVERVIEW - SPACE LINK PROTOCOLS WORKING GROUP (SLS-SLP)
Welcome to the Space Link Protocols Working Group Collaborative Work Environment. The Space Link Protocols Working Group (SLS-SLP) falls under the Space Link Services (SLS) Areas of the CCSDS.

This WG develops and adapts wherever possible link layer protocols for new mission environments (proximity communication, formation flying, optical communication, missions utilizing high rate telemetry and telecommand.

In line with the evolutions in the CCSDS link layer protocols which occurred in the recent years, e.g. development of the Proximity-1 Space Link Protocol, it has become necessary to update and complete the Green Books related to these protocols.

POINTS OF CONTACT

Greg KazzChair: Greg Kazz
NASA/Jet Propulsion Laboratory
M/S: 301-170U
4800 Oak Grove Drive
Pasadena, CA 91109-8099
USA

Telephone: +1 818 393 6529
FAX: +1 818 393 9815
E-mail: Greg.J.Kazz@jpl.nasa.gov

MAILING LIST
sls-slp@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

SLS-SEA-DLS

OVERVIEW - SPACE DATA LINK LAYER SECURITY WORKING GROUP (SLS-SEA-DLS)
Welcome to the Space Data Link Layer Security Working Group Collaborative Work Environment. The Space Data Link Layer Security Working Group (SLS-SEA-DLS) falls under the Space Link Services (SLS) Areas of the CCSDS.

The objectives of this Working Group is to develop a recommendation for a security protocol operating at the data link layer of CCSDS spacelinks. Target missions are civilian missions (science, earth observation, telecommunications, ...). This security protocol should provide authentication and/or encryption both for uplink and downlink. It should be compatible with CCSDS TM, TC and AOS data link protocols and be independent from any specific cryptographic algorithm.

POINTS OF CONTACT

Gilles MouryChair: Gilles Moury
CNES/Centre National d'Etudes Spatiales
18, Avenue Edouard Belin
31401 Toulouse Cedex 4
France

Telephone: +33 5 61 27 37 90
FAX: +33 5 61 28 19 96
E-mail: Gilles.Moury@cnes.fr

Howie WeissDeputy Chair: Howard Weiss
Parsons
7110 Samuel Morse Drive
Columbia, MD 20146

Telephone: +1.443.430.8089
FAX: +1.443.430.8238
E-mail: howard.weiss@parsons.com

MAILING LIST
sls-sea-dls@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

SLS-OPT

OVERVIEW - OPTICAL COMMUNICATIONS WORKING GROUP (SLS-OPT)
Welcome to the Optical Communications Working Group Collaborative Work Environment. The Optical Communications Working Group (SLS-OPT) falls under the Space Link Services (SLS) Areas of the CCSDS.

POINTS OF CONTACT

Bernard EdwardsChair: Bernard Edwards
NASA/GSFC
Goddard Space Flight Center
Code 560 Greenbelt, Maryland 20771
USA

Telephone: NA
E-mail: Bernard.L.Edwards@nasa.gov

Klaus-Juergen Schulz Deputy Chair: Klaus-Juergen Schulz
ESA/European Space Agency
Robert-Bosch-Str. 5 D-64293
Darmstadt Germany

Telephone: +49 (0)6151-90-2472
E-mail: Klaus-Juergen.Schulz@esa.int

MAILING LIST
sls-opt@mailman.ccsds.org
Click here to join mail list
Click here to view archives

CHARTER
Click Here

Space Link Services Area
(SLS)

AD: Gian Paolo Calzolari