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

Status of Delta-DOR interoperability

Roma Oct 20th, 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)

• n-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