14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 1

EVLA Hybrid Array

&

Transition Plan

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 2

Hybrid Array

• The Hybrid Array is the VLA with a mix of VLA & EVLA hardware and software– VLA antennas with EVLA antennas

– VLA correlator with prototype WIDAR correlator

– VLA correlator with WIDAR correlator subset

– VLA correlator with full WIDAR correlator

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 3

Transition Plan

• The Transition Plan is the plan by which – Control of EVLA hardware is implemented as EVLA

software

– Control of VLA hardware is moved to EVLA-hosted software

– With no significant periods of downtime on the array

• Hybrid Array operation ends when all VLA hardware and software has been replaced by EVLA hardware and software

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 4

Required Functionality

– Control of EVLA antennas

– Control of VLA Correlator• To do so via EVLA-hosted software requires the new VLA

Correlator Controller

– Control of VLA antennas

– Science data archiving in VLA format

– Control of prototype WIDAR correlator

– Control of WIDAR correlator

– Science data archiving in EVLA format

DCS

Serial LineController

Modcomp(Spectre)

Samplers Delays X +

SystemController

DRacks

ArrayPrcsr

AnalogSum

Baseband IFs

Correlator

Modcomp(Monty)

SharedMem

Modcomp(Boss)

VisibilityData

Monitor data

Commands

Waveguide(to/frm antennas)

9 trk tape

Workstations

Operator Cntrl TerminalRS232

I/O bus

IPS IPSdisk

Ethernet

VisibilityData

ArchivePath

VLA Antenna Control

OperatorControl

OperatorControl

MonitorData

ArchivePath

CorrelatorControl

Visibility Data,Monitor DataVLA Archive

Format

Linux/Wintel (igloo)

Visibility Data,VLA Archive

Format

DCS

File: /users/bsahr/EVLA/architecture_design/hybrid_array/EVLA_antcntrlflow.vsd

Serial LineController

Modcomp(Spectre)

Samplers Delays X +

SystemController

DRacks

ArrayPrcsr

AnalogSum

Baseband IFs

Correlator

Modcomp(Monty)

SharedMem

Modcomp(Boss)

VisibilityData

Waveguide to/frmVLA antennas

9 trk tape

Visibility Data,Monitor DataVLA Archive

Format

Workstations

I/O bus

IPS IPSdisk

Ethernet

VLA Operator Cntrl

CMP

VLA Cmnds & Monitor Data

VLA Cmnds &Monitor Data

RS

2 32

Linux/Wintel

(mchost)

Linux/WintelOracle(c3po)

EVLAnetwork

Monitordata,

VLA &EVLA

Raw

ant

enna

dat

aM

onito

r da

ta

Cm

nds

EVLA Antennas

DRacks

DTSRcvr

Cm

nd

sM

on

ito

r D

ata

EVLA IFDTS

Reconstitutedanalog data

Workstation

Linux/Wintel (igloo)

EVLA Op Cntrl

. . .

EVLAAntennaControl

VLAAntennaControl

DCS

File: /users/bsahr/EVLA/architecture_design/hybrid_array/VLA_correlcntrlr.vsd

Serial LineController

Samplers Delays X +

DRacks

AnalogSum

Baseband IFs

Correlator

Modcomp(Monty)

SharedMem

Modcomp(Boss)

VisibilityData

Waveguide to/frmVLA antennas

9 trk tape

Visibility Data,Monitor DataVLA Archive

Format

Workstations

I/O bus

IPS IPSdisk

Ethernet

VLA Operator Cntrl

CMP

VLA Cmnds & Monitor Data

VLA Cmnds &Monitor Data

RS

2 32

Linux/Wintel

(mchost)

Linux/WintelOracle(c3po)

EVLAnetwork

(Ethernet)

Monitordata,

VLA &EVLA

Raw

ant

enna

dat

aM

onito

r da

ta

Cm

nds

EVLA Antennas

DRacks

DTSRcvr

Cm

nd

sM

on

ito

r D

ata

EVLA IFDTS

Reconstitutedanalog data

Workstation

Linux/Wintel (igloo)

NewSystem

Controller

NewArrayPrcsr

CorrelatorControl

via Modcomp

EVLA Op Cntrl

. . .

Path for EVLAcontrol of

old Correlator

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 8

New Correlator Controller

CPU(Motorola)

ArrayProcessorInterface

CPUArchiving

Telcal

VME bus

VSB bus

VLA correlatorintegrator

Ethernet

Boss(Modcomp)

Archive

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 9

New Correlator Controller

• Phase I– Replaces present correlator controller (including the FPS

array processor)– Provides visibility data to present, Modcomp-based VLA

monitor & control system– Accepts commands over the Ethernet

• Phase II– Add a 2nd CPU card to handle archiving & Antsol/Telcal

functionality– Allows for parallel operation of Modcomp-based VLA

software and Linux/Wintel-based EVLA software– Can retire the Modcomps without disturbing the EVLA

File: /users/bsahr/EVLA/architecture_design/hybrid_array/EVLA_archiving.vsd

Serial LineController

Samplers Delays X +

DRacks

AnalogSum

Baseband IFs

Correlator

VisibilityData

Waveguide to/frmVLA antennas

Cntrl Bldg Ethernet

CMP

VLA Cmnds &Monitor Data

Linux/Wintel

(mchost)

EVLA PatchPanels &Switches

Raw

ant

enna

dat

aM

onito

r da

ta

Cm

nds

EVLA Antennas

DRacks

DTSRcvr

Reconstitutedanalog data

NewSystem

Controller

NewArrayPrcsr

. . .

Dig

itiz

ed a

nte

nna d

ata

Cm

nds

Monitor

Dat

a

Workstation

EVLA Op Cntrl

Linux/WintelOracle(c3po)

Monitordata,

VLA &EVLA

Archiving,VLA Format,

TelCalStorage

ArchiveData

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 11

Milestones, Near Term

• mid-June 2004 First Fringes on Ant 13 at L band (done)• mid-July 2004 Routine test observing using Ant 13

(VLA Operators controlling the antenna)• mid-July 2004 Ant 13 moved into the array, 2 IFs,

Bands L, X, K, & Q usable • Early Sept 2004 Ant 14, first fringes• Late Sept 2004 Ant 14 moved into the array• Late Sept 2004 Ant 16, begin retrofit to EVLA design,

full production electronics• Q4 2004 Inclusion of EVLA antennas in VLA

observing (on a regular basis)

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 12

Milestones, Mid-term,Revision

• Q1 2005 Control of new VLA Correlator Controller by Modcomp hosted software

• Q1 2005 WIDAR Correlator PDR (3/29-3/30/2005)• Q2 2005 Control of new VLA Correlator Controller by

EVLA-hosted software• Q3 2005 Archiving and Telcal functionality added to

new Correlator Controller• Q4 2005 Control of VLA antennas by EVLA-

hosted software• End of Modcomps retired

Q4 2005

File: /users/bsahr/EVLA/architecture_design/hybrid_array/EVLA_archiving.vsd

Serial LineController

Samplers Delays X +

DRacks

AnalogSum

Baseband IFs

Correlator

VisibilityData

Waveguide to/frmVLA antennas

Cntrl Bldg Ethernet

CMP

VLA Cmnds &Monitor Data

Linux/Wintel

(mchost)

EVLA PatchPanels &Switches

Raw

ant

enna

dat

aM

onito

r da

ta

Cm

nds

EVLA Antennas

DRacks

DTSRcvr

Reconstitutedanalog data

NewSystem

Controller

NewArrayPrcsr

. . .

Dig

itiz

ed a

nte

nna d

ata

Cm

nds

Monitor

Dat

a

Workstation

EVLA Op Cntrl

Linux/WintelOracle(c3po)

Monitordata,

VLA &EVLA

Archiving,VLA Format,

TelCalStorage

ArchiveData

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 14

Milestones, Long Term

• Q1-Q2 Assembly, HW tests, On-Sky tests of 2006 prototype WIDAR correlator at VLA site

• Q2 2006 WIDAR Correlator CDR (6/19-6/20/2006)

• Q4 2007 Acceptance of WIDAR Correlator subset

• Q4 2007 Science data archiving, EVLA format

• Late Q4 Start of “shared-risk” observing with 2007 WIDAR Correlator subset

14-Jun-2004 EVLA Software Design ReviewTransition Plan

Bill Sahr 15

Milestones, long term

• End of Turnover of full WIDAR CorrelatorQ4 2008

• End of Earliest possible date to retire the VLAQ4 2008 Correlator

• Q3 2010 Last VLA antenna retrofitted to the EVLA design

End of Hybrid Array Operations

• Late Q2 Last EVLA receiver installed2012