Presentation EddiCam consortium, FF, Madrid 13/06/2002 Eddington programmatic status Fully approved...

Presentation EddiCam consortium, FF, Madrid 13/06/2002

Eddington programmatic status

• Fully approved by SPC as part of ESA’s science program as project (“reserve status” dropped) in May 2002.

• Single project w/ Herschel and Planck:– Herschel platform reuse– Integrated project team

• Launch 2007/2008– Flexibility in launch date depending on P/L availability– Extremely tight development schedule requires fast P/L procurement


P/L procurement approach

• Integrated approach to P/L (telescope + camera)• Joint procurements, ESA + PI contribution• Define PI-procured items now


Next steps

• Prepare Science Management Plan (SMP)• SMP describes the implementation of the mission

– Must define PI responsibilities, data rights, etc.– Pre-requisite for an AO

• Define PI-procured items now


Eddington P/L definition• Eddington P/L current baseline (Astrium study) comprises 4

(identical) telescopes• Each telescope includes

• Optical assembly (OA)

• Optical bench (OB)

• Focal plane assembly (FPA)

• Front-end electronics (FEE)

• Data processing unit (DPU)

• Complete P/L to be procured by ESA+PI+Industry team• Industrial components will be procured through open ITT• PI components to be procured through AO


The Telescope

• Innovative approach, split aperture• 4 x folded Schmidt cameras, 60 cm aperture• Optical design: Collecting area + Field of view.

– 6º FOV, planar, unvignetted, and fully corrected.– Symmetric PSF– 1.5 x 106 photo-electrons/s for V = 11

• Mirrors– SiC.– Coating with flat spectral response 400-900 nm.


riveted Al rings

payload / spacecraft I/F

Telescope optical design


riveted Al rings

payload / spacecraft I/F

Telescope mechanical design


Satellite w/ solar panels folded


EddiCam

• A single focal plane instrument:– Array of 8 CCDs covering the 6º FOV ( 12 cm).– Frame-store operation

• CCD detectors: 20 x 80 mm in size– 740 x 2900, 27 (1.5 arcsec), pixels.– Full-well capacity: 1.6 x 106 e-/pix. – Operation at -90o (passive cooling) in L2 orbit.


EddiCam configuration

3

1

5

7

2

6

4

8

4000 pix

2000 pix

Pixel size 14 x 14

•CCD dimensions = 112mm x 28mm

• Image size = 112 mm

• Fully buttable = Gaps < 1mm


Eddington definition: further steps

• ESA project team to be formed soon• No detailed schedule, etc. available prior to

establishment of formal project team. But:– SMP to be submitted to AWG on Oct. 1, 2002– Definition phase (A+B1) to be completed by 1Q 2003 to

allow start of phase C/D in 2004– Option for (cheap) copy of Herschel bus expires in July

2003

• Define PI contributions now


Eddington possible PI contributions

• PI contributions must be realistic– Financially (compatible w/ available national funds)– Technologically (compatible w/ available facilities,

expertise in national labs)– Schedule-wise (must not risk impacting project schedule –

specially important given special Eddington status)

• Today’s discussion beginning of this project• AO (and SIP) will be written keeping into account

today’s discussion


Eddington possible PI contributions (1)

• Support to ESA– Support in requirement definition and optimization

• During ITT preparation, for P/L studies and implementation• During industrial contract execution

– Support in system definition– Support in design definition

• Both at the scientific as well as at the technical level



• Scientific characterization of CCDs– Development of Eddington CCD test-bed facility– Screening of industrially procured chips for EM, QM, FM’s

and FS– Scientific characterization of representative CCD’s for

Eddington FPA in relevant configuration, environment– Radiation testing and analysis of relevant chip(s)– Long-term performance characterization of relevant chip(s)– Support to FPA characterization, calibration at industrial site– Filter, grism characterization (if any)



• Support to industry– Support in the analysis of telescope test and calibration data– Science support for the design and test of the mirror

assembly– Science support for the specification, design and test of each

FPA unit/model– As above for FEE– Specification of DPU functionality



• Calibration– Provision of telescope calibration SW– Post-delivery testing and calibration of all units (EM, QM,

FM, FS)– Scientific analysis of all calibration data– Provision of relevant calibration data and information to ESA– Provision of optical calibration test facility (major task, could

e.g. use Liege facility)



• Software and ops support– Science software (boundary TBD)

• On-board (DPU)• On-ground (science reduction and calibration)

– Analysis SW in support of ESA and industry for test and calibration

– Check-out and commissioning support– In-flight calibration support

Presentation EddiCam consortium, FF, Madrid 13/06/2002 Eddington programmatic status Fully approved...

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