[cssm] CPIF - RIDs 5,6,and 11 (Keyhole and CableWrap)

[Colin.Haddow at esa.int]

Dear all,
                  just been trying to do the updates to the schema as 
discussed yesterday at the Webex and was reading the red book before 
starting the updates (i.e. replace Keyhole and CableWrap with 
ProviderLimitation), only to find that we may already have this covered 
and all that needs to be done is remove the Keyhole and CableWrap events.

The reason for saying this is that we have RetComms and FwdComms events 
already defined and in a note at the bottom of table 3-4 it states;

"NOTE   ?       The Forward and Return Communication Start and End events 
are used by the provider to specify the possible start and end of 
communication service windows to a user platform, relative to any and all 
limitations and constraints under which that provider can execute user 
services.  The specific limitations and constraints are not implied and 
are left up to the provider to consider, so long as the user platform can 
plan and request any service whose Start and End times are contained 
(inclusive) within the timeframe bounded by the COMS_START and COMS_END 
events.
                Typical limitations and constraints accounted for when 
defining the COMS_START and COMS_END events are constraints associated 
with antenna elevation, cable wrap, visibility masks, slew rates, etc."

so the question is to we need the ProviderLimitation events in view of 
this ?

I can see there may be some use in indicating a limitation rather than 
just providing an available comms window, but would appreciate other vies.

Cheers for now,

Colin

---------------------------------------------------------------------------------------------------------
Dr. Colin R. Haddow,
HSO-GI, European Space Agency,
European Space Operations Centre,
Robert-Bosch-Str 5,
64293 Darmstadt,
Germany.

Phone; +49 6151 90 2896
Fax;      +49 6151 90 3010
E-Mail;  colin.haddow at esa.int
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