Status of Delta-DOR interoperability E SOC, Darmstadt October 19 - - PowerPoint PPT Presentation
Status of Delta-DOR interoperability E SOC, Darmstadt October 19 th , 2009 Mattia Mercolino E SA/ E SOC, Summary ESA-JAXA DOR tracking on Hayabusa / VEX Status and plans of ESA enhanced Wideband DOR for future supports to JPL
E SOC, Darmstadt October 19th, 2009 Mattia Mercolino E SA/ E SOC,
ESA-JAXA ΔDOR tracking on Hayabusa / VEX Status and plans of ESA enhanced Wideband ΔDOR for
ESA-JPL wideband ΔDOR interoperability testing and
Acquisitions: 2 acquisitions of Hayabusa were made during 2008 During the first tracking there were problems in DSN
antenna pointing for the uplink of ranging tones to the S/C, therefore only quasar and carrier signal were acquired
The second tracking was successful Data translation: After a first round of data translation / correlation, problems
with biases of JAXA data when correlated against either NNO data or DSN data, were detected
Any need for further investigation? How can ESA help on this?
timeframe
baseline validation on VEX
DDOR Date in 2009 UTC 2010 DoY CEB 10 DEG BOA BOT EOT EOA 06-Nov 05:43-07:43 310 06:28 05:43 06:28 07:28 07:43 14-Dec 07:25-09:25 348 08:10 07:25 08:10 09:10 09:25 DDOR Date in 2010 UTC 2010 DoY CEB 10 DEG NNO BOA NNO BOT NNO EOT NNO EOA Status with NNO Comments 16-Feb 08:25-10:25 47 08:38 08:25 09:10 10:10 10:25 OK 20-Mar 08:05-10:05 79 08:00 08:05 08:50 09:50 10:05 OK 11-Apr 07:40-09:40 101 07:41 07:40 08:25 09:25 09:40 NOK Move to DSN 10-May 07:50-09:50 130 07:43 07:50 08:35 09:35 09:50 NOK Move to DSN 23-Jun 08:50-10:50 174 08:52 08:50 09:35 10:35 10:50 NOK Move to DSN
From Phoenix support experience, the limiting factor of ESA ΔDOR
accuracy is the total spanned bandwidth at the receiver (maximum 28 MHz) that allows the reception of only one of the ΔDOR tones at X-band (19 MHz wrt the carrier)
ESA is undergoing an activity to upgrade its ΔDOR receiving
capabilities for wideband ΔDOR (i.e. use of both 19 MHz tones and/or 2nd harmonics of such tones)
Some rewiring of the back-end at both Cebreros and New Norcia
DSA was performed during summer 2009.
In order to be able to acquire the spectrum The wiring will be upgraded as follows
The new wiring was installed in Cebreros and New Norcia later
than expected due to the slip pf Herschel-Plank launch.
At both stations the wiring concept was successfully validated
during Summer 2009
Dry-run tests were run in late September showing that some
modification is needed in the IFMS receiver. Such modification has already been requested and work is currently on-going.
Modifications on the S/W correlator are also needed. These will be
undertaken during 2010.
The objective is to acquire data in Wide-band during the first
months of 2010 for later processing.
following options are foreseen:
First functional validation of the acquisition with one station only First end-to-end validation on ESA S/C (VEX in the frame of th eactivity
already foreseen)
Real-scenario validation using a S/C with DOR tones at X-band
candidate MRO. Is this feasible in the frame of the mutual agreement between JPL and ESA for Delta-DOR operations? Any other S/C that could be used?
Two are the configuration to be tested: Delta-DOR from ESA stations only Delta-DOR in mixed-baseline mode
Validate ESA wideband raw data capture Validate ESA capability of correctly correlate data acquired in wideband
at its stations
Validate ESA capability of correctly correlate data acquired in wideband
in mixed-baseline mode
ESA-JPL MRO Delta-DOR tentative schedule: JPL to provide ESA with possible tracking dates ESA to arrange such trackings within its station schedule
TBD 10 HW upgrades readiness SW upgrades readiness
Tracking and data processing and validation
ESA is undertaking an upgrade to wideband Delta-DOR in order to
be able to support recordings up to 100 MHz wide (the limitation in this case is the diplexer) in the band 8.4 – 8.5 GHz
This should enhance the Delta-DOR accuracy of the ESA system to
the same level of the JPL system
Once the capability is installed, verified and tested in a real-case
scenario (i.e. with VEX and then with MRO), JPL and ESA could jointly produce and distribute to the MSL project a Memo outlining the obtained results
Status of MSL project? Request for ESA DDOR support?