M00001615
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ISO 20208 1st Edition, August 15, 2015 Space data and information transfer systems - Delta-DOR Raw Data Exchange Format
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Availability date: 07/13/2021
Description / Abstract:
SCOPE AND APPLICABILITY
This Recommended Standard contains the specification for a
Delta-DOR RDEF designed for applications involving Delta-DOR raw
data interchange among space agencies.
The format here specified can be equally used for collecting and
exchanging more general open loop raw data.
This data format is suited to inter-agency exchanges that
involve automated interaction. The attributes of the RDEF make it
primarily suitable for use in computer-to-computer
communication.
The characteristics of the data recording (sampling rate and
quantization) are defined within the RDEF. There is no definition
of accuracy for raw Delta-DOR data, and hence no assessment of
accuracy is provided in the exchange format. An assessment of
accuracy for reduced Delta-DOR measurements is outside the scope of
this Recommended Standard. This Recommended Standard defines only
the data format and content, but not the means for its
transmission. The method of transmitting the data among partners is
beyond the scope of this document. Data transmission could be based
on a CCSDS data transfer protocol, filebased transfer protocol such
as SFTP, stream-oriented media, or other secure transmission
mechanism. In general, the transmission mechanism shall not place
constraints on the technical data content of an RDEF.
PURPOSE
Delta-DOR (Delta Differential One-Way Ranging) is a Very Long
Baseline Interferometry (VLBI) technique that can be used in
conjunction with Doppler and ranging data to improve spacecraft
navigation by more efficiently determining spacecraft angular
position in the plane of sky. It involves the use of multiple
ground stations, possibly belonging to different agencies, for
simultaneous acquisition of either spacecraft or quasar signals
(see reference [D2]).
This Delta-DOR Raw Data Exchange Format (RDEF) Recommended
Standard specifies a standard format for use in exchanging
Delta-DOR raw data among space agencies. Delta- DOR raw data
exchange is required every time the data correlation involves at
least one participating station not belonging to the agency
responsible for the correlation.This document includes
specifications on the parameter fields that the data format has
been designed to meet. For exchanges where these specifications do
not capture the needs of the participating agencies another
mechanism may be selected.