# Report of the Meeting of

**CCSDS Subpanel-1F (Advanced Orbiting Systems)**

**09-10 November, 2000**

## Rutherford Appleton Laboratory, Oxford, UK

**[A. INTRODUCTION:]{.underline}**

CCSDS Subpanel-1F met at RAL on 09-10 November 2000. The objectives of
the meeting were:

1.  To overview the full program of work of Subpanel 1F, including:

-   The original AOS specifications created for Space Station, including
    the Audio/Video specification

-   The SCPS set of Internet-adapted upper layer protocols

-   The CFDP upper layer protocol.

2.  To specifically examine the status of the Audio/Video specification,
    which has been inactive.

3.  To review the status of the SCPS protocols.

4.  To continue the progression of the CFDP Red Book towards final
    status.

**[B. DISCUSSION AND AGREEMENTS:]{.underline}**

The meeting agenda is contained in Attachment-1.

Copies of all presentation materials that are referenced below are
available for download from the CCSDS Subpanel 1F website:

<ftp://ccsds1.gsfc.nasa.gov/pub/ccsds/p1f/P1FNovember2000/>

The meeting attendees are listed in Attachment-2.

1.  ***Audio/Video Blue Book***

The current Audio/Video book (CCSDS 704.0-B-1: Advanced Orbiting
Systems, Networks and Data Links: Audio, Video, and Still-Image
Communications Services. Blue Book. Issue 1. May 1994) has not been
maintained for the last 7 years and there is concern that its references
to specific commercial audio and video standards are almost certainly
obsolete and should not be recommended for new designs. On the other
hand, it contains much information of general information on the topic.
Since there are no known current users for the Book (which was
originally created for the Space Station), it was agreed that rather
than expend the effort and resources to change it into a Green Book or
other diversion, it should be moved to the \"Obsolete/Withdrawn\"
section of the website at <http://www.ccsds.org/ccsds/all_books.html>.
Copies of obsolete and superseded standards are always kept on the web
and CD-ROM, in case somebody actually did implement one and needs the
reference.

ESA noted that there is a strong possibility that they may have the
resources available soon to review and suggest updates to the book.
However, if the outcome is positive then they could simply take the
Obsolete book, update it and circulate as Pink Sheets for review

2.  ***SCPS***

Bob Durst of MITRE and Eric Travis of GST gave a summary
("Durst-SCPS-Report-11-00.ppt") of the four SCPS Blue Books:

a)  SCPS File Protocol (SCPS-FP), which is interoperable with Internet
    FTP.

b)  SCPS Transport Protocol (SCPS-TP), which is interoperable with
    Internet TCP/UDP.

c)  SCPS Security Protocol (SCPS-SP), which provides Internet IPSEC-like
    end-to-end data protection in a highly bit-efficient manner.

d)  SCPS Network Protocol (SCPS-NP), which provides space
    internetworking in a flexible and highly bit-efficient manner that
    is also compatible with Internet IP addressing.

It was noted that the SCPS-NP supports carrying the IPv4 Authentication
Header as a next-layer protocol (which, in turn, encapsulates UDP, TCP,
or other packets). There are fields in an IP header that are required by
the Authentication Header itself that are not present in the NP. A
specification must be generated to state what these fields are and how
they are formatted to accompany the Authentication Header. It was also
noted that an Internet Draft needs to be created which defines how IP
can be mapped into the underlying CCSDS Link Layer protocols.

John Pietras presented ("Pietras-STRV-FPE-11-00.ppt") the series of SCPS
flight tests that are currently planned to be conducted using on the
Space Technology Research Vehicle (STRV 1D) spacecraft.

3.  ***CFDP***

    Dick Carper followed John Pietras by presenting
    ("Carper-CFDP-STRVtestPlan2.ppt") the series of CFDP flight tests
    that are proposed to be conducted on STRV 1D. He also reviewed the
    current status of the CFDP Green Book ("Carper-
    CFDP-GreenBooks-Rpt.ppt) and noted that the recent history of the
    various publications of the CFDP Red Book is as follows:

-   July 99 meeting: produced Red 3 "Stable Red Book"

-   October 99 meeting: produced Red 3.1 update

-   May 00 meeting: produced Red 3.2 update.

    The current (R3.2) Red Book is online at
    <ftp://ccsds1.gsfc.nasa.gov/pub/ccsds/p1f/cfdp/> . Scott Burleigh
    described the status of this document, which was the subject of the
    remainder of the meeting.

    It was noted that incremental updates to the stable Red-3 book are
    being made in order to reflect the results of the ongoing program of
    implementation and interoperability testing. Current implementations
    are being performed by:

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-   BNSC/DERA (Rob Smith, "Smith-DERA-CFDPStatus-0011.ppt")

-   ESA (Max Ciccone)

-   NASA/JPL (Tom Huynh)

-   NASDA (Hiroaki Miyoshi, "NASDA-CFDP-11-00.ppt").

    Rob Smith reported on the highly successful series of CFDP
    interoperability tests that were held during the previous week (30
    October -- 03 November) at DERA in Farnborough. The ESA, NASDA and
    DERA implementations were tested against each other locally in the
    laboratory environment, while the JPL implementation was tested
    against the other three using UDP over the Internet. It was noted
    that these tests will continue, but that in addition it is hoped to
    secure support to flight-test the CFDP on the STRV 1D spacecraft.

Marjorie de Lande Long presented her "Study of CFDP over Packet TC/TM"
("deLandeLong-CFDP.pdf) and gave a demonstration of a CFPD Simulation
and Validation Tool.

Based on Marjorie's inputs, the results of interoperability testing and
miscellaneous inputs made over the past 6-months, a list of 46 issues
with the CFDP specification was created ("Carper-CFDP-Issues.ppt" or
"Carper-CFDP-Issues.pdf"). Scott Burleigh led the remainder of the
meeting, which extended through the second day and was spent in detailed
technical discussions. Of the 46 issues, 42 were accepted as valid
items. 39 of these were resolved during the meeting, 2 were held over
till next meeting, and 1 was held over for offline resolution.

The revised schedule for the CFDP documents was tentatively established
as follows:

(a) Interoperability testing: November 2000-May 2001

(b) Issue-3.3 Red Book: Mid-February 2001

(c) CFDP flight test on STRV 1D: March -- April 2001

(d) Subpanel meeting: prepare Draft Blue Book May 2001

(e) Formal Agency review of Draft Blue Book: June 2001 -- October 2001

(f) Blue Book-1/Green Book-1: November 2001

It was noted that the Blue Book schedule could be accelerated if
required in order to meet space mission baselining requirements. The
Subpanel chairman agreed to synchronize the CFDP Red Books with the ISO
draft international standard review cycles.

**[C. RESOLUTIONS:]{.underline}**

**R00-11-01:**

CCSDS Subpanel-1F resolves to thank its host, BNSC-RAL, and in
particular Dr. David Giaretta for the excellent hosting arrangements,
and in particular the provision of Internet connectivity to all
participants.

**R00-11-02:**

CCSDS Subpanel-1F resolves to recommend to Panel-1 that the Blue Book
for "Audio, Video and Still Image Data Transfer" should be moved to the
\"Obsolete/Withdrawn\" section of the CCSDS website.

ESA is invited to attempt to assemble resources to review and suggest
updates to the book, in which case they should update the specification
and circulate Pink Sheets for review

**R00-11-03:**

CCSDS Subpanel-1F resolves to issue "update 3.3" to the current (stable
Red Book 3) technical specification of the CCSDS File Delivery Protocol
(CFDP).

**R00-11-04:**

CCSDS Subpanel-1F resolves that Agencies should continue the ongoing
program of implementation and interoperability testing of the CFDP. In
particular, Agencies should attempt to conduct an actual flight test of
the protocol, using the STRV 1D spacecraft.

**[D. ACTION ITEMS:]{.underline}**

**A00-11-01:**

Notify Panel-1 that the Subpanel recommends that the Blue Book for
"Audio, Video and Still Image Data Transfer" should be moved to the
\"Obsolete/Withdrawn\" section of the CCSDS website.

**Assigned to:** Adrian Hooke

**Due Date:** 00-11-28

**A00-11-02:**

Identify IP header fields necessary to support carrying IPv4
Authentication Header by the SCPS-NP, and draft a spec that shows how
these fields shall be organized in relation to the SCPS-NP and the IPv4
AH.

**Assigned to:** Bob Durst

**Due Date:** 00-12-15

**A00-11-03:**

Create an Internet Draft that defines how IP may be mapped into the
various underlying CCSDS Link layer data structures.

**Assigned to:** Bob Durst

**Due Date:** 01-01-15

**A00-11-04:**

Deliver draft CFDP Red-3.3 text to Dick Carper.

**Assigned to:** Scott Burleigh

**Due Date:** 01-02-14

**A00-11-05:**

Synchronize the CFDP Red Books with the ISO draft international standard
review cycles.

**Assigned to:** Adrian Hooke

**Due Date:** 00-11-30

**A00-11-06:**

Continue the ongoing program of implementation and interoperability
testing of the CFDP

**Assigned to:** BNSC/DERA: Rob Smith

ESA: Max Ciccone

NASA: Tom Huynh

NASDA: Hiroaki Miyoshi

**Due Date:** Ongoing.

**[E. NEXT MEETING:]{.underline}**

The next meeting of CCSDS Subpanel-1F will tentatively be held as
follows:

***Date:*** Week of 14 May 2000.

***Place:*** USA, West Coast: provisionally at or near JPL in Pasadena,
California.

**Attachment-1: Meeting Agenda**

[Thursday, 09 November]{.underline}

0900 Welcome, Introductions, Agenda Review Adrian Hooke

Hosting Arrangements Dave Giaretta

0915 Proposal to downgrade Audio/Video Adrian Hooke

Blue Book

0930 SCPS Status Report Bob Durst

\- specifications

\- reference software

\- test and implementation experience

\- Discussion

1030 Break

1045 STRV 1D SCPS Flight Experiment John Pietras

1115 STRV 1D CFDP Flight Experiment Dick Carper

1145 Status of CFDP Red Book Scott Burleigh

1200 Status of CFDP Green Books Dick Carper

1215 Lunch

1345 Status of Agency CFDP Implementations:

1345 - ESA Max Ciccone

1405 - BNSC/DERA Rob Smith

1425 - NASDA Hiroaki Miyoshi

1455 - NASA Scott Burleigh

1515 DERA interoperability testing report Rob Smith

1530 Break

1545 Study of CFDP over Packet TC/TM Marjorie de Lande Long

1630 Discussion of CFDP issues

1700 Demonstration of CFPD Simulation ESA/ESOC/deLL

& Validation Tool

1730 Adjourn.

[Friday, 10 November]{.underline}

0830 Summary of CFDP issues needing discussion Scott Burleigh

Agenda for Technical discussions

0900 Technical discussions, Session-1

1230 Lunch

1330 Technical discussions, Session-2

1600 Summary and wrap-up session Adrian Hooke

\- Reports from technical discussions

\- Plan for next 6-months

\- Resolutions and Actions

1700 Adjourn

### Attachment-2

**Attendance, P1F Meeting, RAL, November 2000**

**Name Affiliation**

  -------------------------------------------- --------------------------
  **Bornschlegl, Eric**                        **ESA/ESTEC**

  **Brosi, Fred**                              **NASA/ST**

  **Burleigh, Scott**                          **NASA/JPL**

  **Calzolari, Gian Paolo**                    **ESA/ESOC**

  **Carper, Richard**                          **NASA/GST**

  **Ciccone, Massimiliano**                    **ESA-ESTEC**

  **de Lande Long, Ian**                       **ESA/deLL**

  **de Lande Long, Marjorie**                  **ESA/deLL**

  **Dubon, Lydia P.**                          **NASA/JPL**

  **Durst, Robert**                            **NASA/MITRE**

  **Greenberg, Edward**                        **NASA/JPL**

  **HOOKE, Adrian J**                          **NASA JPL**

  **Kenny, Gavin**                             **BNSC/Logica**

  **Levesque, Mike**                           **NASA JPL**

  **Pietras, John**                            **NASA/GST**

  **Pritchard, Jim**                           **NASA/GSFC**

  **Repaci, Max**                              **NASA/GST**

  **RUMEAU, Robert**                           **CNES**

  **Smith, Rob**                               **DERA/BNSC**

  **Travis, Eric**                             **NASA/GST**

  **Weiss, Howard**                            **NASA/SPARTA**
  -------------------------------------------- --------------------------