[SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS Spring Meeting

Tue Apr 21 08:09:26 EDT 2026

Ok perfect!

Thank you,

Tomaso

From: Felix Flentge <Felix.Flentge at esa.int> 
Sent: Tuesday, April 21, 2026 2:08 PM
To: de Cola, Tomaso <Tomaso.deCola at dlr.de>
Cc: sis-cfdpv1 at mailman.ccsds.org
Subject: RE: CFDP B6 Standard - Working Group Last Call / CCSDS Spring
Meeting

Dear Tomaso,

The book is available in CWE:

<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFD
PV1/Draft%20Documents/727x0b6_WhiteBook/CCSDS%20File%20Delivery%20Protocol_T
RACK_CHANGES_B5.docx?d=w1f0c1aaabbfb4d6caa5cedfa02f62a49&csf=1&web=1&e=aEXxU
d> CCSDS File Delivery Protocol_TRACK_CHANGES_B5.docx

<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFD
PV1/Draft%20Documents/727x0b6_WhiteBook/727x0b6_WhiteBook_March_2026_CLEAN.d
oc?d=w8536caec37314fa8a7e248ce89cd93ef&csf=1&web=1&e=Sl6tkf>
727x0b6_WhiteBook_March_2026_CLEAN.doc

Regards,

Felix

From: Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de>
<Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de> > 
Sent: 21 April 2026 14:01
To: Felix Flentge <Felix.Flentge at esa.int <mailto:Felix.Flentge at esa.int> >
Cc: sis-cfdpv1 at mailman.ccsds.org <mailto:sis-cfdpv1 at mailman.ccsds.org> 
Subject: RE: CFDP B6 Standard - Working Group Last Call / CCSDS Spring
Meeting

Ok Felix, once available please share the draft so that I can start with the
formalities towards the agency review. As such I agree that we don't need
any CFDP meeting in May.

As to the other pending points, I see as top priority finding an agency for
the second priority. This is something I can raise at CESG level and if the
case check with the CMC delegates to find out who could put the necessary
resources. I also agree about silverising the green books. They do contain a
lot of interesting and valuable material but they should be entirely
reworked and agencies certainly don't have the necessary resource for this
kind of work.

Regards,

Tomaso

From: Felix Flentge <Felix.Flentge at esa.int <mailto:Felix.Flentge at esa.int> > 
Sent: Tuesday, April 21, 2026 1:48 PM
To: Felix Flentge <Felix.Flentge at esa.int <mailto:Felix.Flentge at esa.int> >;
de Cola, Tomaso <Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de> >
Cc: sis-cfdpv1 at mailman.ccsds.org <mailto:sis-cfdpv1 at mailman.ccsds.org> 
Subject: RE: CFDP B6 Standard - Working Group Last Call / CCSDS Spring
Meeting

Dear All,

I haven't received any Working Group comments on the final draft of the CFDP
B6 book.

 <mailto:tomaso.decola at dlr.de> @Tomaso de Cola: I would suggest to trigger
agency review for CFDP B6.

Regarding my questions below, I have also received no answers. My
conclusions:

1)      I will cancel the CFDP WG Meeting for the CCSDS Spring Meetings.

2)      We still need to find a second implementation for interoperability
testing. Maybe this can be addressed at CESG level.

3)      No other topics to discuss.

I would suggest to put the CFDP Working Group to a 'dormant state' after:

A)      We have successfully published the CFDP B6 Blue Book

B)      We have decided what to do with the CFDP Green Books. It certainly
would make sense to update those to align with CFDP B6 and include
operational experience. However, I don't think anyone would currently put
resources into this. So, we might decide to silverize them after B6
publication to indicate that they may be slightly outdated.

Regards,

Felix

From: SIS-CFDPV1 <sis-cfdpv1-bounces at mailman.ccsds.org
<mailto:sis-cfdpv1-bounces at mailman.ccsds.org> > On Behalf Of Felix Flentge
via SIS-CFDPV1
Sent: 24 March 2026 07:19
To: Tomaso de Cola <tomaso.decola at dlr.de <mailto:tomaso.decola at dlr.de> >
Cc: sis-cfdpv1 at mailman.ccsds.org <mailto:sis-cfdpv1 at mailman.ccsds.org> 
Subject: Re: [SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS
Spring Meeting

Hi Tomaso,

We are currently implementing and will try to prepare the Yellow Book while
doing it.

We should be ready by summer. The main question is about the other
implementation.

Regards,

Felix

From: Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de>
<Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de> > 
Sent: 23 March 2026 17:58
To: Felix Flentge <Felix.Flentge at esa.int <mailto:Felix.Flentge at esa.int> >
Cc: sis-cfdpv1 at mailman.ccsds.org <mailto:sis-cfdpv1 at mailman.ccsds.org> 
Subject: RE: CFDP B6 Standard - Working Group Last Call / CCSDS Spring
Meeting

Hi Felix,

Thanks for starting this. My understanding is that this book once ready will
go in agency review and in parallel implementation will start to have in
turn the yellow book for the newly inserted procedures, isn't it?

Regards,

Tomaso

From: Felix Flentge <Felix.Flentge at esa.int <mailto:Felix.Flentge at esa.int> > 
Sent: Monday, March 23, 2026 5:05 PM
To: Felix Flentge via SIS-CFDPV1 <sis-cfdpv1 at mailman.ccsds.org
<mailto:sis-cfdpv1 at mailman.ccsds.org> >
Cc: de Cola, Tomaso <Tomaso.deCola at dlr.de <mailto:Tomaso.deCola at dlr.de> >
Subject: CFDP B6 Standard - Working Group Last Call / CCSDS Spring Meeting

Dear CFDP Working Group,

I would like to initiate a Working Group Last Call for the CFDP B6 standard
we have discussed in the past meetings.

The final draft is available with and without track changes wrt to B5 in
CWE:

<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFD
PV1/Draft%20Documents/727x0b6_WhiteBook/CCSDS%20File%20Delivery%20Protocol_T
RACK_CHANGES_B5.docx?d=w1f0c1aaabbfb4d6caa5cedfa02f62a49&csf=1&web=1&e=aEXxU
d> CCSDS File Delivery Protocol_TRACK_CHANGES_B5.docx

<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFD
PV1/Draft%20Documents/727x0b6_WhiteBook/727x0b6_WhiteBook_March_2026_CLEAN.d
oc?d=w8536caec37314fa8a7e248ce89cd93ef&csf=1&web=1&e=Sl6tkf>
727x0b6_WhiteBook_March_2026_CLEAN.doc

The change record contains a summary of the major changes. However,
editorial changes have been applied across the document, so I would
recommend to review the version with track changes. Please note that there
are still some minor formatting issues across the document which I haven't
been able to resolve completely (this will be done later by the CCSDS Tech
Editors).

Please let me have any comments, concerns or specific change requests you
may have until 20 April.

At that time, I will gather all feedback received from the WG and determine
whether we will need a dedicated discussion. If not, I will ask Tomaso to
initiate agency review.

Regarding a meeting of the CFDP WG during the CCSDS Spring Technical
Meetings: I assume I will be very busy with the DTN WG meetings but I could
arrange for a CFDP WG Meeting on Thursday, 28 May, 15:30-17:30 local time
(Puerto Rico, should be19:30 - 21:30 UTC). However, I assume that not many
CFDP WG participants will travel to the CCSDS meetings, so I would prefer to
not organise a CFDP meeting during that week unless many CFDP WG members are
present and wishing to meet. Otherwise, I will just call for a remote
meeting some other time (either before the Spring Meetings if we have to
discuss the B6 Final Draft or after we got agency feedback or want to
discuss interoperability testing). So, could you please let me know (until
20 April):

1)      If you are interested in a CFDP WG meeting during the CCSDS Spring
Technical Meetings (Thursday, 28 May, 15:30-17:30 local time) and whether
you would be able to join in person?

2)      If you are interested in participating in the interoperability
testing of B6 (implementation is on-going at ESA)?

3)      If there are any other CFDP topics you would like to discuss?

Regards,

Felix

_________________________________________ 
ESA - European Space Agency 
Dr. Felix Flentge (he, him, his)
Software Engineer, OPS-GSB
Ground Systems Engineering and Innovation Department
Directorate of Operations

ESA - ESOC
Robert-Bosch-Str.5, D-64293 Darmstadt, Germany 
Phone: +49 6151 90 4075 | Email:  <mailto:Felix.Flentge at esa.int>
Felix.Flentge at esa.int

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