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Status of Delta-DOR interoperability Berlin October 14 th, 2008 Mattia Mercolino ESA/ESOC,
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Summary ESA DOR support to Phoenix Mixed baseline DOR support to Phoenix ESA DOR support to Hayabusa ESA-JAXA DOR tracking on MEX ESA-JAXA DOR tracking on VEX
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ESA DOR support to Phoenix
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ESA support and results ESA-only baseline (New Norcia – Cebreros 35 m antennas) 20 passes: 19 operational (4 of which critical passes with delta-DOR reduced data delivery within 24 hours) 1 test pass Results indicates a post-fit residual of 0.12 ns ESA – JPL mixed baseline (New Norcia – Robledo) 6 passes: 5 operational passes (among the 19 operational passes with ESA-only baseline) 1 test pass (carried out on December 1 st 2007) Results Pre-fit residuals in the order of 0.3 ns Post-fit residuals in the order of 0.1 ns
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ESA translator to VSR validation ESA – JPL and JPL – only data were used to validate the ESA data translator and correlator vs. JPL data correlator Data acquired on three different DOYs (and different baselines) were translated into VSR format and shipped to JPL Data Correlation was performed with identical settings (start time, integration time, block accumulation time) with both JPL and ESA correlators Results indicate that the single DOR differs always for less than 0.1 ns, below the theoretical accuracy achievable with the used settings
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ESA DOR support to Hayabusa
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Hayabusa observations (1) Prerequisites: ESA to be authorised to track Hayabusa no authorisation needed Steps to be done: Check whether the possibility to track Hayabusa from either Cebreros or New Norcia exists, in the frame of the NASA/JAXA yearly cross-support ok Provision from JAXA of OEM data of Hayabusa ok Capture data from New Norcia (simultaneously with Usuda and Goldstone) on August the 11 th a first tracking test was executed for New Norcia ESA to translate captured data to VSR format and transfer them to JAXA TBD JAXA to translate collected data into either Mk5 or VSR and to transfer them to ESA (if Usuda is used) ok ESA to correlate the raw data and to provide the results to JAXA Orbit determination Group TBD JAXA to correlate the raw data and to provide the results to JAXA Orbit determination Group TBD JAXA to perform an end-to-end validation, at Orbit Determination level
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Tentative schedule Hayabusa DDOR tracking June 2008 November 2008 November + 6 months Jan 2008 Campaign preparation Tracking campaign Data processing and validation JAXA / ESA agreement Translator readiness
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ESA-JAXA DOR tracking on MEX
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MEX observations The following steps need to be foreseen: Capture data from New Norcia and Usuda (and possibly Cebreros) JAXA to translate collected data into either Mk5 or VSR and to transfer them to ESA ESA to translate collected data into VSR and to transfer them to JAXA ESA to correlate the raw data and to provide the results to ESA Orbit determination Group JAXA to correlate the raw data and to provide the results to ESA Orbit determination Group ESA to provide information on final validation, based on MEX known orbit What do we achieve with that? Validation of mutual raw data capture Validation of the mutual translation function Validation of the mutual correlation function Validation of a pre-operational environment ESA to check possible dates for a MEX tracking in the timeframe end 2008 beginning 2009
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Tentative schedule MEX DDOR tentative tracking: JAXA to confirm whether a JAXA/ESA agreement is needed as a prerequisite No agreement needed November 08January 09TBD 09 Translators readiness Tracking campaign October 2008 Data processing and validation
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ESA-JAXA DOR tracking on VEX
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VEX observations VEX is currently being observed monthly (once per month) by ESA in order to provide JPL with plane-of-the-sky measurement of the S/C The following steps need to be foreseen: Capture data from New Norcia and Usuda (and possibly Cebreros) JAXA to translate collected data into either Mk5 or VSR and to transfer them to ESA ESA to translate collected data into VSR and to transfer them to JAXA ESA to correlate the raw data and to provide the results to ESA Orbit determination Group JAXA to correlate the raw data and to provide the results to ESA Orbit determination Group ESA to provide information on final validation, based on MEX known orbit What do we achieve with that? Validation of mutual raw data capture Validation of the mutual translation function Validation of the mutual correlation function Validation of a pre-operational environment ESA to provide JAXA the dates for a VEX tracking in the timeframe end 2008 beginning 2009
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Tentative schedule MEX DDOR tentative tracking: JAXA to confirm whether a JAXA/ESA agreement is needed as a prerequisite No agreement needed November 08January 09TBD 09 Translators readiness Tracking campaign October 2008 Data processing and validation
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