[Css-csts] SLE Issues

[John Pietras]

CSTSWG colleagues ---
The difference between the CMM-CLCW state tables that I had developed
and Wolfgang's proposal was that I had neglected to indicate that the
two-way round trip light time should be added to the completion of the
acquisition sequence as the incoming event that triggers the
production-status to transition to 'interrupted'  if the CLCW indicates
no bit lock. I have updated the state tables and uploaded them to the
CWE > Cross Support Services Area (CSS) > Documents > CSS-CSTS > CWE
Private > SLE Services folder at URL
 
http://cwe.ccsds.org/css/docs/CSS-CSTS/CWE%20Private/SLE%20Services/CMM-
CLCW%20state%20machine-R1.xlsx

I also corrected the column header for CMM-4 for PLOP-2 (it is now just
"CMM-4", since there are no separate preamble/trailer roles for CMM-4 in
PLOP-2).

However, adding the dependency on the round trip light delay raises a
question. Is the FCLTU service (or its associated production process)
expected to "know" the appropriate round-trip light delay, such that it
can know when to use lack of RF availability following uplink sweep and
lack of bit lock following completion of the acquisition sequence to
determine that the production-status should transition to 'interrupted'?
How do the FCLTU implementations handle this - do they automatically
compute the delays, are they somehow "dialed in" by an operator, or is
the user somehow expected to provide durations to be used in the
calculations?

Thanks for any insight/feedback on this question.

Best regards,
John
 
-----Original Message-----
From: css-csts-bounces at mailman.ccsds.org
[mailto:css-csts-bounces at mailman.ccsds.org] On Behalf Of
Wolfgang.Hell at esa.int
Sent: Thursday, October 18, 2012 8:21 AM
To: css-csts at mailman.ccsds.org
Subject: [Css-csts] SLE Issues


Dear Colleagues,

I have uploaded to CWE private - SLE the presentation that I gave
yesterday on the issues implementers ran into with the current SLE
Recommended Standards. As you may recall, we skipped the part that deals
with the interdependencies of production-status, CLCW evaluation and
PLOP states. As complementing material I have also uploaded a
spreadsheet kindly prepared by John that reflects the changes /
additions / clarifications I suggest be put into F-CLTU. I believe that
except for one minor point John's state machines match with what I
propose for the book. Can you please review this material with fresh
unbiased eyes so that we can come to a conclusion if the proposed
material fixes the related issues in the F-CLTU Book?

Thank you,

Wolfgang


This message and any attachments are intended for the use of the
addressee or addressees only. The unauthorised disclosure, use,
dissemination or copying (either in whole or in part) of its content is
not permitted. If you received this message in error, please notify the
sender and delete it from your system. Emails can be altered and their
integrity cannot be guaranteed by the sender.

Please consider the environment before printing this email.


_______________________________________________
Css-csts mailing list
Css-csts at mailman.ccsds.org
http://mailman.ccsds.org/cgi-bin/mailman/listinfo/css-csts