back-end overview (both analog and digital) for vlbi2010 east coast geodetic vlbi meeting 23-24 feb,...

Back-end overview (both analog and digital) for VLBI2010 East Coast Geodetic VLBI Meeting 23-24 Feb, 2011, Haystack Observatory Bill Petrachenko

Upload: tobias-phelps

Post on 18-Jan-2016

213 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

TRANSCRIPT

Back-end overview (both analog and digital) for VLBI2010

East Coast Geodetic VLBI Meeting

23-24 Feb, 2011, Haystack Observatory

Bill Petrachenko

Goals for the VLBI2010 back-end system Handle VLBI2010 mode of observation

4 bands each using both linear polarizations 1-GHz bandwidth per band 2-14 GHz input frequency range

Achieve Optimum use of on-source time and record capability Burst mode Switch for routing to recorders

Handle multiple inputs, e.g. More than one VLBI antenna on-site Holography antenna Reference antenna for antenna deformations and site

ties

Page 3: Back-end overview (both analog and digital) for VLBI2010 East Coast Geodetic VLBI Meeting 23-24 Feb, 2011, Haystack Observatory Bill Petrachenko

H-switch4321

V-switch4321

UV_512

UH_512

LV_512

LH_512

RDBE

UDC(2-14 GHz)

UV_512

UH_512

LV_512

LH_512

RDBE

UDC(2-14 GHz)

UV_512

UH_512

LV_512

LH_512

RDBE

UDC(2-14 GHz)

UV_512

UH_512

LV_512

LH_512

RDBE

UDC(2-14 GHz)

BurstMode

&Switch

Recorder

To external processinge.g. GPS

log

rap

fere

nce

log

rap

fere

nce

VLBI2010 Back-endsignal path

block diagram

Antenna inputs

Page 4: Back-end overview (both analog and digital) for VLBI2010 East Coast Geodetic VLBI Meeting 23-24 Feb, 2011, Haystack Observatory Bill Petrachenko

Notes on back-end features (1 of 2)

4-to-1 switches on H- and V-inputs to allow automatic switching between, for example: Two antennas (Ant1 and ant2) of a 2-antenna site where the

antennas are never scheduled to observe simultaneously. Reference antenna for determining antenna deformations

and site ties Holography antenna for measuring antenna surface.

Extra splitter outputs For external processing, e.g. GPS.

Enhancements to UDC 2-14 GHz frequency range 2x anti-alias filtered V-output @ 512-MHz 2x anti-alias filtered H-output @ 512-MHz

Page 5: Back-end overview (both analog and digital) for VLBI2010 East Coast Geodetic VLBI Meeting 23-24 Feb, 2011, Haystack Observatory Bill Petrachenko

Notes on back-end features (2 of 2) Enhancements to RDBE

2x V-input @ 512-MHz 2x H-input @ 512-MHz No gain-control? (already in UDC)

Burst mode processor and switch (needed to avoid inefficient use of media (see attached plot) Max 32-Gbps input bandwidth, 8-Gbps from each RDBE Max 16(32?)-Gbps output bandwidth, 4(8?)-Gbps to each of

up to 4 record systems Up to 30(?)-s record capacity at 32-Gbps input rate. Simultaneous read and write capability

Page 6: Back-end overview (both analog and digital) for VLBI2010 East Coast Geodetic VLBI Meeting 23-24 Feb, 2011, Haystack Observatory Bill Petrachenko

E-VLBI Development at Haystack Observatory 5 th Annual e-VLBI Workshop Haystack Observatory 20 September 2006 Alan R. Whitney Kevin Dudevoir Chester Ruszczyk

TheDevelopmentoftheVLBI2010Global$ … · 2018-12-12 · VLBI2010#–V2C#Progress#Report " “Design#Aspects#of#the#VLBI2010#System”# Current VLBI2010 antenna size 5–100 m dish

The Mark 5B VLBI Data System Alan Whitney MIT Haystack Observatory 10 Jan 2006 IVS General Meeting Concepion, Chile

E-VLBI: Connecting the World’s Radio Telescopes with High-Speed Networks Alan R. Whitney MIT Haystack Observatory Westford, Massachusetts, USA

High Sensitivity VLBI Sheperd Doeleman MIT Haystack Observatory

E-VLBI: A Brief Overview Alan R. Whitney MIT Haystack Observatory

VLBI2010 in NASA’s Space Geodesy Project

e-VLBI International Research Networking Needs Alan R. Whitney MIT Haystack Observatory

1 1 January 27, 2009 VLBI2010 Proof-of-Concept Signal Chain Arthur Niell MIT Haystack Observatory

VLBI Standard Interface – Electronic (VSI-E) Protocol Fundamentals Chet Ruszczyk MIT Haystack Observatory

Overview of the NASA/Haystack VLBI2010 Receiver FrontendsOverview 1. Description of NASA Broadband VLBI Receiver Frontend 2. Receiver Performance 3. Calibration Signal Injection 4

E-VLBI Development Program at MIT Haystack Observatory Alan R. Whitney Chester A. Ruszczyk MIT Haystack Observatory 13 July 2005 e-VLBI Workshop Australia

VLBI with ALMA - MIT Haystack Observatory · PDF fileVLBI with ALMA Geoff Crew and the ALMA Phasing Project Team 5th International VLBI Technology Workshop ... EHTC% Some Additional

IVS GM 20061 January 10, 2006 Interaction of Atmosphere Modeling and VLBI Analysis Strategy Arthur Niell MIT Haystack Observatory

“VLBI2010: Current and Future Requirements for Geodetic ... · generation geodetic VLBI system was established based on the recommendations for future IVS products detailed in the

Phase calibration in prototype VLBI2010 systems Brian Corey (MIT Haystack Observatory) With thanks for contributions by: Alan Rogers, Roger Cappallo, Mike

E-VLBI Development at Haystack Observatory Alan Whitney Chet Ruszczyk MIT Haystack Observatory 10 Jan 2006 IVS General Meeting Concepion, Chile

VDIF (VLBI Data Interchange Format) as a common data format in e-VLBI era. M. Sekido (NICT) M.Kettenis(ATNF), C.Phillips(JIVE), A.Whitney(MIT/Haystack),

First broadband results with a VLBI2010 system · 2012 March 6 IVS General Meeting 6 VLBI2010 signal chain Cooled broadband QRFH feed and LNAs (Caltech) UpDown Converters (4) (Haystack)

E-VLBI over TransPAC Masaki HirabaruDavid LapsleyYasuhiro KoyamaAlan Whitney Communications Research Laboratory, Japan MIT Haystack Observatory, USA Communications

An Event Horizon Telescope: (sub)mm VLBI of Sgr A* Shep Doeleman MIT Haystack Observatory

NEXPReS and the EVN - MIT Haystack ObservatoryInternational VLBI Technology Meeting, Haystack, October 2012. huib 08/06/1 0 /28. WP 7: Work flow Manager (PSNC) • Simplifies and enhances

Twin Radio Telescope Wettzell Technical Specifications€¦ · IVS WG 3 –VLBI2010: Current and future requirements for geodetic VLBI Systems • Determination of the relative position

E-VLBI Development at Haystack Observatory Alan Whitney Chet Ruszczyk Kevin Dudevoir Jason SooHoo MIT Haystack Observatory 24 March 2006 EVN TOG meeting

Mark 6: design and status update VLBI Technical Meeting MIT Haystack Observatory 2012.10.23 Roger Cappallo Alan Whitney Chet Ruszczyk

Phasing ALMA for VLBI - Max Planck Society · Collaboration • ALMA Phasing collaborators: NRAO, Haystack, MPIfR, ASIAA, NAOJ, U. Concepcion • Other (sub)mm VLBI collaborators:

Overview of (sub)mm-VLBI Shep Doeleman MIT Haystack Observatory

e-VLBI Development Program at MIT Haystack Observatory

Design Aspects of the VLBI2010 System

Mark 6 VLBI Data System Alan Whitney Roger Cappallo Chet Ruszczyk Jason SooHoo MIT Haystack Observatory 11 Oct 2013 2 nd International VLBI Technical Jeju,

E-VLBI – Creating a Global Radio-Telescope Array via High-Speed Networks Alan R. Whitney MIT Haystack Observatory Internet2 Fall Member Meeting San Diego,

The Gala-V, our unique solution for the VLBI2010 Kazuhiro Takefuji On behalf of VLBI Group of NICT/Kashima

e-VLBI Development at Haystack Observatory

EVGA – Looking back at the early beginnings · 4 Oct. 1980 Bonn geodetic VLBI group, Werthhoven - Haystack MkIII- X-band fast slewing experiment Haystack-MIT, NASA GSFC (test of

The Green Bank Telescope Frank Ghigo, National Radio Astronomy Observatory 7 th US VLBI Technical Meeting, Haystack, Nov 2009