[CMC] [CESG] Response for CMC-A-2015-05-05

[Nestor.Peccia at esa.int]

Dear all,

Please find attached the CCSDS CSS Area response to the action mentioned 
above

ciao
nestor
================================
For your convenience, the CMCA AI reads as follows:

CMC-A-2015-05-05 
The Cross Support Services Area was requested to consider using 
Terrestrial Generic File Transfer Service along with the Tracking Data 
Message (TDM) to potentially eliminate the need for a new CSTS Offline 
Radiometric Service standard. 
Action: Cross Support Services Area 
Due Date: 30 June 2015 
Status: Open
 
Summary Response:
As written the action is already satisfied and can be closed.  The plan is 
already to use TDM via TGFT.    More detailed discuss can be found below.
 
More detailed discussion:
 
Other than it's identification, the off-line radiometric data transfer 
service is only mentioned in IOAG service catalog one, June 2013 version, 
as part of the validated radiometric service type. Therefore, from the CSS 
area perspective, the question is really about what is meant by 
"validated" radiometric service. To that end the cross support services 
area is pursuing a study which can be projected to be available at the 
fall 2015 meetings as to the concerns, issues, and suggestions with regard 
to producing validated radiometric data. As a result of this, if we 
proceed in defining the validator radiometric service it will likely only 
be a relatively thin recommendation that addresses concerns for packaging 
of TDM's in the validated context and indicating also the rather thin 
profile needed for putting this on top of TGFT.  Below is the extract from 
the IOAG service catalog describing this service.
 
---from IOAG June 2103 service catalog---
 
VALIDATED DATA RADIO METRIC SERVICE TYPE
This Service enables a Control Center to receive the data involved in 
orbit computation as received
and validated by a Ground Tracking Asset. Validated data include 
traditional and Pseudo-Noise
ranging results as well as correlated Delta-DOR data. Such data are 
provided to a Control Center
within files assembled by the Ground Tracking Asset. This Service relies 
on the following Space
Link Interface Standards and Ground Link Interface Standards.
? Radio Frequency and Modulation [RFM] limited to module for ?Radio 
Metric?
? Pseudo-Noise (PN) Ranging Systems [PNR]
? CSTS Offline Radio Metric Service [CORS] over
? CSTS Transfer File Service [CFXS]
 
Remark - The [DDORO] Recommended Practice addresses Delta-DOR aspects as 
e.g.,
configuration requirements for interagency Delta-DOR measurement; 
interagency exchange of
measurement data; parameters that are necessary in order to correlate and 
process the data at one of
the agencies; interagency transfer of the generated observables; and the 
end-to-end flow of control.
Remark - The two CSTS File Services listed above are ?to be written?. It 
is assumed that a generic
transfer file service allowing to transfer files between two units, i.e. 
[CFXS], will be available and
- on top of this generic service ? more ?specialized? file services will 
allow requesting the
dedicated processing for the file being transferred. In this case, it is 
expected that the CSTS Offline
Radio Metric Service will allow the Ground Tracking Asset to inform the 
Control Center about
applied processing and file contents (i.e. Tracking Data Messages (TDM) 
according to the [TDM]
standard specifying a format for use in exchanging spacecraft tracking 
data).
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