From Felix.Flentge at esa.int  Tue Apr 21 07:47:33 2026
From: Felix.Flentge at esa.int (Felix Flentge)
Date: Tue, 21 Apr 2026 11:47:33 +0000
Subject: [SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS
 Spring Meeting
In-Reply-To: <PA1PR05MB11716348EA026FFD945B14DEFF748A@PA1PR05MB11716.eurprd05.prod.outlook.com>
References: <PA1PR05MB11716DEB7321AF9296E4107E9F74BA@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <63c2b62760ce4e66877221d9656b9351@dlr.de>
 <PA1PR05MB11716348EA026FFD945B14DEFF748A@PA1PR05MB11716.eurprd05.prod.outlook.com>
Message-ID: <PA1PR05MB1171627D0AC19747EF40F4160F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>

Dear All,

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

@Tomaso de Cola<mailto:tomaso.decola at dlr.de>: 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:


  1.  We have successfully published the CFDP B6 Blue Book
  2.  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 So, we might decide to silverize them after B6 publication to indicate that they may be slightly outdated.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> On Behalf Of Felix Flentge via SIS-CFDPV1
Sent: 24 March 2026 07:19
To: Tomaso de Cola <tomaso.decola at dlr.de>
Cc: 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:

CCSDS File Delivery Protocol_TRACK_CHANGES_B5.docx<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/CCSDS%20File%20Delivery%20Protocol_TRACK_CHANGES_B5.docx?d=w1f0c1aaabbfb4d6caa5cedfa02f62a49&csf=1&web=1&e=aEXxUd>

727x0b6_WhiteBook_March_2026_CLEAN.doc<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/727x0b6_WhiteBook_March_2026_CLEAN.doc?d=w8536caec37314fa8a7e248ce89cd93ef&csf=1&web=1&e=Sl6tkf>

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: Felix.Flentge at esa.int<mailto:Felix.Flentge at esa.int>

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int<mailto:dpo at esa.int>).
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int<mailto:dpo at esa.int>).
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).
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From Tomaso.deCola at dlr.de  Tue Apr 21 08:01:03 2026
From: Tomaso.deCola at dlr.de (Tomaso.deCola at dlr.de)
Date: Tue, 21 Apr 2026 12:01:03 +0000
Subject: [SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS
 Spring Meeting
In-Reply-To: <PA1PR05MB1171627D0AC19747EF40F4160F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
References: <PA1PR05MB11716DEB7321AF9296E4107E9F74BA@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <63c2b62760ce4e66877221d9656b9351@dlr.de>
 <PA1PR05MB11716348EA026FFD945B14DEFF748A@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <PA1PR05MB1171627D0AC19747EF40F4160F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
Message-ID: <50ca1cefca3e485b9e9c2cbbe294df81@dlr.de>

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> 
Sent: Tuesday, April 21, 2026 1:48 PM
To: Felix Flentge <Felix.Flentge at esa.int>; 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 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

 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

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From Felix.Flentge at esa.int  Tue Apr 21 08:07:52 2026
From: Felix.Flentge at esa.int (Felix Flentge)
Date: Tue, 21 Apr 2026 12:07:52 +0000
Subject: [SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS
 Spring Meeting
In-Reply-To: <50ca1cefca3e485b9e9c2cbbe294df81@dlr.de>
References: <PA1PR05MB11716DEB7321AF9296E4107E9F74BA@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <63c2b62760ce4e66877221d9656b9351@dlr.de>
 <PA1PR05MB11716348EA026FFD945B14DEFF748A@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <PA1PR05MB1171627D0AC19747EF40F4160F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <50ca1cefca3e485b9e9c2cbbe294df81@dlr.de>
Message-ID: <PA1PR05MB117167E7A8CA745E392264C99F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>

Dear Tomaso,

The book is available in CWE:

CCSDS File Delivery Protocol_TRACK_CHANGES_B5.docx<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/CCSDS%20File%20Delivery%20Protocol_TRACK_CHANGES_B5.docx?d=w1f0c1aaabbfb4d6caa5cedfa02f62a49&csf=1&web=1&e=aEXxUd>

727x0b6_WhiteBook_March_2026_CLEAN.doc<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/727x0b6_WhiteBook_March_2026_CLEAN.doc?d=w8536caec37314fa8a7e248ce89cd93ef&csf=1&web=1&e=Sl6tkf>

Regards,
Felix

From: Tomaso.deCola at dlr.de <Tomaso.deCola at dlr.de>
Sent: 21 April 2026 14:01
To: Felix Flentge <Felix.Flentge at esa.int>
Cc: 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.

@Tomaso de Cola<mailto:tomaso.decola at dlr.de>: 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:

CCSDS File Delivery Protocol_TRACK_CHANGES_B5.docx<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/CCSDS%20File%20Delivery%20Protocol_TRACK_CHANGES_B5.docx?d=w1f0c1aaabbfb4d6caa5cedfa02f62a49&csf=1&web=1&e=aEXxUd>

727x0b6_WhiteBook_March_2026_CLEAN.doc<https://spacecomm.sharepoint.com/:w:/r/sites/SIS/Shared%20Documents/SIS-CFDPV1/Draft%20Documents/727x0b6_WhiteBook/727x0b6_WhiteBook_March_2026_CLEAN.doc?d=w8536caec37314fa8a7e248ce89cd93ef&csf=1&web=1&e=Sl6tkf>

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: Felix.Flentge at esa.int<mailto:Felix.Flentge at esa.int>

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int<mailto:dpo at esa.int>).
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int<mailto:dpo at esa.int>).
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int<mailto:dpo at esa.int>).
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).
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From Tomaso.deCola at dlr.de  Tue Apr 21 08:09:26 2026
From: Tomaso.deCola at dlr.de (Tomaso.deCola at dlr.de)
Date: Tue, 21 Apr 2026 12:09:26 +0000
Subject: [SIS-CFDPV1] CFDP B6 Standard - Working Group Last Call / CCSDS
 Spring Meeting
In-Reply-To: <PA1PR05MB117167E7A8CA745E392264C99F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
References: <PA1PR05MB11716DEB7321AF9296E4107E9F74BA@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <63c2b62760ce4e66877221d9656b9351@dlr.de>
 <PA1PR05MB11716348EA026FFD945B14DEFF748A@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <PA1PR05MB1171627D0AC19747EF40F4160F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
 <50ca1cefca3e485b9e9c2cbbe294df81@dlr.de>
 <PA1PR05MB117167E7A8CA745E392264C99F72C2@PA1PR05MB11716.eurprd05.prod.outlook.com>
Message-ID: <2733914359dd4f21a9a33b156e18b25f@dlr.de>

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

 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

This message is intended only for the recipient(s) named above. It may
contain proprietary information and/or protected content. Any unauthorised
disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA
applies appropriate organisational measures to protect personal data, in
case of data privacy queries, please contact the ESA Data Protection Officer
(dpo at esa.int <mailto:dpo at esa.int> ). 

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From Felix.Flentge at esa.int  Mon Apr 27 09:42:55 2026
From: Felix.Flentge at esa.int (Felix Flentge)
Date: Mon, 27 Apr 2026 13:42:55 +0000
Subject: [SIS-CFDPV1] DTN ConOps Presentation & Summary / Spring Meetings
 Agenda
Message-ID: <PA1PR05MB11716FFEEA40C5C17B8497C12F7362@PA1PR05MB11716.eurprd05.prod.outlook.com>

Dear All,

You will find the DTN ConOps Presentation and the AI Summary (not checked) from last week's WG telecon in CWE --> 260423_DTN_ConOps<https://spacecomm.sharepoint.com/:f:/r/sites/SIS/Shared%20Documents/SIS-DTN/Telecons/260423_DTN_ConOps?csf=1&web=1&e=EFjlmC>. This will serve as the basis for the discussion at the CCSDS Spring Meetings. (From now on, I plan to put all telecon presentation +AI summary into Telecons<https://spacecomm.sharepoint.com/:f:/r/sites/SIS/Shared%20Documents/SIS-DTN/Telecons?csf=1&web=1&e=qnEwYs>).

The rough planning for the Spring Meeting is the following (see SIS-DTN_Spring_2026_Topics+Schedule.xlsx<https://spacecomm.sharepoint.com/:x:/r/sites/SIS/_layouts/15/Doc.aspx?sourcedoc=%7B585F306B-074E-469A-AC4A-B2D70DFF1EDB%7D&file=SIS-DTN_Spring_2026_Topics%2BSchedule.xlsx&action=default&mobileredirect=true>)

Day
Time (local)
Time (UTC)
Topic
Tuesday, 26 May
08:45 - 12:30
12:45 - 16:45
13:30 - 17:30
17:30 - 21:30
Wednesday, 27 May
08:45 - 12:30
12:45 - 16:45
Joint session with SEA-SEC
13:30 - 16:30
17:30 - 20:30
Joint session with SEA, CSS:
DTN ConOps / Network Management:
- DTN ConOps (Felix)
- LunaNet ConOps (Simon)
- SEA-SA ?
16:30 - 17:30
20:30 - 21:30
Thursday, 28 May
08:45 - 12:30
12:45 - 16:45
13:30 - 14:30
17:30 - 18:30
Joint session with SEA-TIME
14: 30 - 17:30
18:30 - 21:30
Wrap-up

Suggested topics are:

  *   Reference Scenarios: Management of variations
  *   DTN Network Management / ConOps (joint session)
  *   DTN Managed Information Orange Book
  *   Bundle-In-Bundle Encapsulation
  *   BPSEC, COSE Security Context, BPSEC Green Book?
  *   BPv7 Blue Book Interop Testing & Finalisation / BPv7 Book Updates
  *   BP Multicast Naming Scheme
  *   Review of project / book status
  *   3-tuple IPN Naming Scheme

If  we have sufficient time, we can add:

  *   BP UQOS - implementation experience
  *   BP Custody & Compressed Reporting - implementation experience
  *   BPSEC Key Management Approaches

Please let me know if there are additional topics to cover.

We will discuss the exact schedule in our telecon on 7 May (no telecon this week).

Regards,
Felix

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).
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From Felix.Flentge at esa.int  Mon Apr 27 09:50:38 2026
From: Felix.Flentge at esa.int (Felix Flentge)
Date: Mon, 27 Apr 2026 13:50:38 +0000
Subject: [SIS-CFDPV1] DTN ConOps Presentation & Summary / Spring
 Meetings Agenda
In-Reply-To: <PA1PR05MB11716FFEEA40C5C17B8497C12F7362@PA1PR05MB11716.eurprd05.prod.outlook.com>
References: <PA1PR05MB11716FFEEA40C5C17B8497C12F7362@PA1PR05MB11716.eurprd05.prod.outlook.com>
Message-ID: <PA1PR05MB11716C66D465DA30ECBCD2E13F7362@PA1PR05MB11716.eurprd05.prod.outlook.com>

Sorry,

Wrong mailinglist.

The CFDP WG meeting during the CCSDS Spring Meetings is cancelled.

Regards,
Felix

From: Felix Flentge
Sent: 27 April 2026 15:43
To: Felix Flentge via SIS-CFDPV1 <sis-cfdpv1 at mailman.ccsds.org>
Subject: DTN ConOps Presentation & Summary / Spring Meetings Agenda

Dear All,

You will find the DTN ConOps Presentation and the AI Summary (not checked) from last week's WG telecon in CWE --> 260423_DTN_ConOps<https://spacecomm.sharepoint.com/:f:/r/sites/SIS/Shared%20Documents/SIS-DTN/Telecons/260423_DTN_ConOps?csf=1&web=1&e=EFjlmC>. This will serve as the basis for the discussion at the CCSDS Spring Meetings. (From now on, I plan to put all telecon presentation +AI summary into Telecons<https://spacecomm.sharepoint.com/:f:/r/sites/SIS/Shared%20Documents/SIS-DTN/Telecons?csf=1&web=1&e=qnEwYs>).

The rough planning for the Spring Meeting is the following (see SIS-DTN_Spring_2026_Topics+Schedule.xlsx<https://spacecomm.sharepoint.com/:x:/r/sites/SIS/_layouts/15/Doc.aspx?sourcedoc=%7B585F306B-074E-469A-AC4A-B2D70DFF1EDB%7D&file=SIS-DTN_Spring_2026_Topics%2BSchedule.xlsx&action=default&mobileredirect=true>)

Day
Time (local)
Time (UTC)
Topic
Tuesday, 26 May
08:45 - 12:30
12:45 - 16:45
13:30 - 17:30
17:30 - 21:30
Wednesday, 27 May
08:45 - 12:30
12:45 - 16:45
Joint session with SEA-SEC
13:30 - 16:30
17:30 - 20:30
Joint session with SEA, CSS:
DTN ConOps / Network Management:
- DTN ConOps (Felix)
- LunaNet ConOps (Simon)
- SEA-SA ?
16:30 - 17:30
20:30 - 21:30
Thursday, 28 May
08:45 - 12:30
12:45 - 16:45
13:30 - 14:30
17:30 - 18:30
Joint session with SEA-TIME
14: 30 - 17:30
18:30 - 21:30
Wrap-up

Suggested topics are:

-          Reference Scenarios: Management of variations

-          DTN Network Management / ConOps (joint session)

-          DTN Managed Information Orange Book

-          Bundle-In-Bundle Encapsulation

-          BPSEC, COSE Security Context, BPSEC Green Book?

-          BPv7 Blue Book Interop Testing & Finalisation / BPv7 Book Updates

-          BP Multicast Naming Scheme

-          Review of project / book status

-          3-tuple IPN Naming Scheme

If  we have sufficient time, we can add:

-          BP UQOS - implementation experience

-          BP Custody & Compressed Reporting - implementation experience

-          BPSEC Key Management Approaches

Please let me know if there are additional topics to cover.

We will discuss the exact schedule in our telecon on 7 May (no telecon this week).

Regards,
Felix

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).
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