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 catalogue  Full interoperability validation

SA wideband  DOR E  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 Results in line with theoretical sigma calculations   End-to-end validation (including OD) still pending  Needed in the frame of In-Sight preparation  Validation with JAXA: still pending (needed in the frame of BepiColombo cross-support)

RDE F interface (1)  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 VLBI MK-V ESA DSN RDEF Correlator RDEF Translator ESA EOLP JPL VSR NASA DSN

RDE F interface (2)  Final RDEF implementation was integrated in the upgraded ESA translator/correlator S/W  Concerning the validation of the RDEF format, Validation with JPL: JUNO data have been used to this  purpose. The exercise showed no issues between JPL implementation and ESA S/W. Validation with JAXA: still pending (needed for the  BepiColombo cross-support)  Validation with BITTT: initiated (on VEX data translated to 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.

Low SNR  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

Ka-band Quasar survey [1]  Following the meeting in Boulder, a roadmap was set together with C. Jacobs to target a Ka-band quasar observation campaign from 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 12/13 th of April (data still to be processed)

Ka-band Quasar survey [2] 8400 km 9900 km 10,600 km 8500 km 9810 km  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

Ka-band Quasar survey [3]  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

Full interoperability validation [1]  In order to have a full interoperability validation between ESA and any other Agency, the following has to be addressed  I/F validation  Validation of RDEF format Validation of TDM (for processed DDOR and meteo data)  Validation of OEM (for orbit predication data)   Functional validation  Validation of wideband DDOR (necessary to support S/C with DOR tone according CCSDS 401-B)  Validation of low SNR (in case S/C with weak signal have to be supported)  End-to-end validation Validation of OD solutions obtained with interoperability  exercise

Full interoperability validation [2] Validation with JPL  I/F validation Validation of RDEF format  OK (on JUNO)  Validation of TDM  OK (several instances, also new TDM)  Validation of OEM  OK (several instances)   Functional validation Validation of wideband DDOR  OK (on JUNO)  Validation of low SNR  Not exercised yet   End-to-end validation Validation of OD solutions  OK (for narrowband DDOR)  Validation of OD solutions  Not done yet (for wideband DDOR)  Priority: exercise end-to-end validation of wideband DDOR (for In-Sight)

Full interoperability validation [3] Validation with JAXA  I/F validation Validation of RDEF format  Not exercised yet  Validation of TDM  OK (TBC)  Validation of OEM  OK   Functional validation Validation of wideband DDOR  Not exercised yet  Validation of low SNR  Not exercised yet   End-to-end validation Validation of OD solutions  Not done yet (for narrowband DDOR)  Validation of OD solutions  Not done yet (for wideband DDOR)  Priority: validate RDEF, end-to-end narrow-band DDOR and end-to-end of wideband DDOR (for BepiColombo)

Full interoperability validation [4] Validation with BITTT  I/F validation Validation of RDEF format  On-going  Validation of TDM  On-going  Validation of OEM  OK   Functional validation Validation of wideband DDOR  Not exercised yet  Validation of low SNR  Not exercised yet   End-to-end validation Validation of OD solutions  Not done yet (for narrowband DDOR)  Validation of OD solutions  Not done yet (for wideband DDOR)  Priority: validate RDEF, end-to-end narrow-band DDOR and end-to-end of wideband DDOR (for Chang’E3)