Status of Delta-DOR interoperability Bordeaux Apr 15 th , 2012 - - PowerPoint PPT Presentation
Status of Delta-DOR interoperability Bordeaux Apr 15 th , 2012 Mattia Mercolino E SA/ E SOC Summary Validation of ESA enhanced Wideband DOR Validation of RDEF format Validation of low SNR development Ka-band Quasar
Bordeaux Apr 15th, 2012 Mattia Mercolino E SA/ E SOC
Validation of ESA enhanced Wideband DOR Validation of RDEF format Validation of low SNR development Ka-band Quasar catalogue Full interoperability validation
All 3 ESA DS antennas are equipped with wide-band DDOR wiring
(latest being MLG, tested from June 2012 on)
Functional tests of wideband implementation was carried out during
Spring/Summer 2012
Final test with flying S/C with DOR tones executed on JUNO (Sept
2013)
Validation with JPL: Data correlated by ESA/JPL in the frame of the
RDEF validation
Validation with JAXA: still pending (needed in the frame of
BepiColombo cross-support)
RDEF format has been implemented at both data translator and
correlator level
The current implementation of the data translator / correlator
provides all possible translation combinations
RDEF Translator NASA DSN JPL VSR ESA DSN Correlator MK-V VLBI ESA EOLP RDEF
Final RDEF implementation was integrated in the upgraded ESA
translator/correlator S/W
Concerning the validation of the RDEF format,
purpose. The exercise showed no issues between JPL implementation and ESA S/W.
with JAXA: still pending (needed for the BepiColombo cross-support)
RDEF and provided to BITTT) in the frame of the Chang’E3 Delta-DOR support. No data received so far from BITTT. No end-to-end exercise completed to date.
Last enhancement of the ESA DDOR correlator regards the
capability to process data at very low SNR (i.e. 1 dBHz)
Such capability has first been implemented and tested with
simulated data in February 2012
Final test was performed on VEX data, which were artificially
manipulated in order to add “thermal-like” noise and lower down the signal-to-noise density ratio on the S/C signal.
Test demonstrated that current ESA implementation agrees with
theoretical expectations given the signal-to-noise density ratio level and the integration time used
Test/Use with actual data may be planned with Hayabusa TBC
with JAXA
Following the meeting in Boulder, a roadmap was set together with
Malargüe, in late 2012, early 2013
An IA and a dedicated TAA were signed between NASA/ESA First set of test was organised, involving Robledo and Canberra
antennas on JPL side and Cebreros on ESA side, in July 2012.
After validation of set-up the PRSR (JPL receiver) has been
shipped to ESA DS-3 (Malargüe) and installed there in November.
First tests executed in December 2012 with detection of fringes in
Ka-band
More
tests (including 12-h long runs) were performed in January/February
Latest tests performed on 12/13th of April (data still to be
processed)
ESA DS-3 adds 3 baseline to the current JPL configuration, allowing for
full southern sky coverage
Almost perpendicular baselines between W-E and N-S directions
9810 km 8400 km 8500 km 10,600 km 9900 km
Tests with MLG allowed the addition of 95 new sources in Ka-band to date Accuracy can be improved only by further observations The continuation of the activity needs a formal request by JPL
In order to have a full interoperability validation between ESA and
any other Agency, the following has to be addressed
I/F validation
Functional validation
DOR tone according CCSDS 401-B)
supported)
End-to-end validation
OD solutions
with interoperability exercise
Validation with JPL
I/F validation
Functional validation
End-to-end validation
Priority: exercise end-to-end validation of wideband DDOR (for In-Sight)
Validation with JAXA
I/F validation
Functional validation
End-to-end validation
Priority: validate RDEF, end-to-end narrow-band DDOR and end-to-end of wideband DDOR (for BepiColombo)
Validation with BITTT
I/F validation
Functional validation
End-to-end validation
Priority: validate RDEF, end-to-end narrow-band DDOR and end-to-end of wideband DDOR (for Chang’E3)