Status of Delta-DOR interoperability Roma Oct 20 th , 2016 Mattia - PowerPoint PPT Presentation

Status of Delta-DOR interoperability Roma Oct 20 th , 2016 Mattia Mercolino E SA/ E SOC

Summary  Study on improved Delta-DOR performance  Ka-band Quasar catalogue activities  Full Delta-DOR interoperability validation with JPL / JAXA / BITTT / FSA  EXMO support  TTCP test/deployment  Radiometer deployments  Antenna array

Study on 1nrad DDOR  Addressed in a dedicated presentation

Ka-band Quasar catalogue activities [1]  Activities in MLG PRSR temporary import expired. Sent back to JPL  Expected to be back to MLG soon   Needed also for Cassini support  Dual freq.  Revised X-band quasar catalogue just published First issue of Ka-band Quasar catalogue still TBC  Several papers published (last at ESA TT&C conference  Sept 2016)  Comparisons with GAIA?

Ka-band Quasar catalogue activities [2]  Proposed activities in CEB JPL requested the possibility of a temporary installation of the  PRSR in CEB to allow frame-tie with Robledo. The PRSR can be temporary installed in CEB (following what  was done in 2012)  However at the moment it is not possible to have the same network arrangement (direct VPN connectivity) that we have with the PRSR in MLG  Also, FEC upgrade including star track functionality is still in the planning cycle for November 2016  Another PRSR will be installed in NNO (Cassini support)

Full interoperability validation [1]  With JPL: MRO/Maven – Completed (any report)?  With JAXA: can be done on Hayabusa-2 (TBC)  With BITTT: outstanding (ESA provided RDEF to china, apparently processed with good results)  With FSA: ESA provided RDEF files to FSA. Files were correctly interpreted. Plans for more validations in the frame of ExoMars 2020 (TBC)

E XOMARS support [1]  ExoMars support triggered a number of activities:  Latency requirement (16hours in critical phases)  SNR for quasar (2-bit quantisation issue)  6 nrad committed accuracy (on-board frequency estimation issue)  System improvements  IFMS open loop adjusted to allow actual 2-bit quantisation  Correlator improvements  New frequency estimation module  Faster processing (I/O handling)  Data transfer (it used to be limited to 2Mb/s)  From CEB: 50 Mb/s (actual 45 Mb/s)  From MLG: 40 Mb/s (actual 35 Mb/s)  From NNO: 20 Mb/s (actual 18 Mb/s)

E XOMARS support [2]  ExoMars support: 64 passes (half CEB-NNO / half CEB-MLG) + 4 test passes  First two test failed  Out of remaining 66 passes only 1 failed (plus 1 less data)  Most of passes provided 3 DDOR points  24-h latency always accomplished  Critical mission phases supported with 4-6 h latency for correlated product delivery

E XOMARS support [3]  Few details still to be worked out

TTCP test/ deployment  TTCP has passed the Factory acceptance and is now being tested at ESOC  OL functionality  16 channels (max 32 Msps per channel)  Max BW = 160MHz (can actually cover more, if needed)  RDEF output  E2E of full TTCP planned in the period February-April 2017  This will include all TC / TM / coding / Doppler / RNG and DDOR (OL) tests. DDOR tests will be done by using EXMO suitcase  Plan of initial deployment: Q2/Q3 2017 in CEB and MLG (1TTCP per station in parallel with 2 IFMS). A bit later in NNO.  After commissioning at the stations 3IFMS replaced by 2TTCP per station  NNO will be updated in 2018 (TBC)  Decommissioning of IFMS immediately after

Other activities [1]  Deployment of Microwave radiometers at ESA DS sites  A HATPRO (humidity/temperature profiler) has been deployed in Cebreros in November 2014  Main purpose: to collect attenuation statistics at X/Ka band  Can also be used to provide good estimations of tropospheric wet path delay  under testing (preliminary results good, more longer campaign being planned)  A second instrument has been procured for installation in MLG (current timeframe for installation: beginning 2017)  Will be used (upon demonstration of improved performance with CEB) also for DDOR measurements  A third instrument was also procured for NNO site. Installation foreseen in 2017/2018  Prototyping of Tropospheric Delay Calibration System (TDCS) for Radio-Science experiments. Target completion date end 2017

Antenna Arraying  Development of off-line correlator for antenna arraying  Purpose: develop algorithms and proof-of-concept for (future) on-line correlator  Only possible baseline is CEB-MLG (sufficient overlap and collecting area)  Will include demodulator and decoder  Will be tested on flying mission (probably EXMO)  It will be able to interface with the current receiver for SLE interface  Project start date: Jun 2016  Expected finish date: Q4 2017