[CESG] Response for CMC-A-2015-05-05
Barkley, Erik J (3970)
erik.j.barkley at jpl.nasa.gov
Tue Jun 2 23:34:49 UTC 2015
For your convenience, the CMCA AI reads as follows:
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
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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