[MOIMS] Time Services BoF

Mario.Merri at esa.int Mario.Merri at esa.int
Thu Nov 30 18:24:10 UTC 2017

Hi Peter,

I have polled the relevant MOIMS WGs to indicate their interest in 
supporting this work and to identify possible contact points:

NAV: the topics of "time exchange, time correlation, and time 
synchronization" are not in the FD domain (they are usually covered by the 
mission control system). As such the NAV CCSDS WG offers the support if 
required, but takes no active role.

SM&C: There is an interest in participating and Sam Cooper is the contact 

MP&S: time is an essential aspect, however we are more a user of Time 
services (e.g. in Plan Execution function) and of time based Events. Not 
knowing the scope, I wanted just to pass the request to also consider the 
specification of an "application level" time service that provides 
capabilities for 
- subscribing to time events in different systems (e.g. for receiving 
notifications for OBT or UTC if for instance a GPS flies onboard) in 
different resolutions
- request a time reset
- request a time synch
- request an event to be triggered on a given time (like an alarm clock)
- ...
We do not need to be involved directly but if the BOF is created, I would 
suggest that we formulate our needs (in form of capabilities needed for 
Mission Planning and Scheduling) in a technical note and pass it to them.

Best regards,


From:   "Shames, Peter M (312B)" <peter.m.shames at jpl.nasa.gov>
To:     "Burleigh, Scott C (312B)" <scott.c.burleigh at jpl.nasa.gov>, 
"Barkley, Erik J (3970)" <erik.j.barkley at jpl.nasa.gov>, Gian Paolo 
Calzolari <Gian.Paolo.Calzolari at esa.int>, "Wilmot, Jonathan J. 
(GSFC-5820)" <jonathan.j.wilmot at nasa.gov>, Mario Merri 
<Mario.Merri at esa.int>
Cc:     "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>, 
"Colin.Haddow at esa.int" <Colin.Haddow at esa.int>, "Kazz, Greg J (312B)" 
<greg.j.kazz at jpl.nasa.gov>, SEA-SA <sea-sa at mailman.ccsds.org>, 
"sea-time at mailman.ccsds.org" <sea-time at mailman.ccsds.org>, Nestor Peccia 
<Nestor.Peccia at esa.int>, "Tai, Wallace S (9000)" 
<wallace.s.tai at jpl.nasa.gov>
Date:   13/11/2017 07:33
Subject:        Time Services BoF

Dear CCSDS Colleagues,
As you heard mentioned during the CCSDS plenary, the IOAG has asked CCSDS 
to develop some standards for time exchange, time correlation, and time 
synchronization.   Organizing that cross area work has fallen on the 
shoulders of the Systems Engineering Area.  We do not, in and of 
ourselves, have all of the resources nor the expertise to do this work 
ourselves.  Consequently, we are asking each of you, who have area and 
working group responsibilities that are related to these topics, to 
indicate your interest in supporting this work and to identify one 
individual who will address the topics from your Area / WG point of view.
Assuming that there is sufficient interest we will convene an exploratory 
BoF session to determine if there is a path forward that makes sense at 
this time.  Please give some thought to how this fits into your area and 
also if there is someone you can identify to lead this work.  We will also 
poll the CMC to see if they have anyone they would like to propose as WG 
Thanks, Peter

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