the field camera unit project definition, organization, planning s. scuderi inaf – catania

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The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

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Page 1: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

The Field Camera UnitProject definition,

organization, planning

S. Scuderi

INAF – Catania

Page 2: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

FCU subsystems

Field Camera Unit (FCU)

FC-PSUMechanical

FrameLF-UV

CameraSF-UV

Camera

OCOptical Camera

Thermal Control

FC-DHU

WIC Meeting, Moscow, 27-30 June 2006

Page 3: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Phase A objectives

• Definition of scientific objectives – Science team constitution – FCU top level requirements definition – Filter passbands definition

• Analysis of technical (optics, mechanics, electronics) solutions to satisfy system and scientific requirements.

• Identification of solutions through trade-off processes

• Development of AIV and GSE principles

WIC Meeting, Moscow, 27-30 June 2006

Page 4: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Phase B1 objectives

• Identification of critical elements• Analysis of expected performances• Finalization of trade off processes• Consolidation of the project through

feasibility of subsystems• Costs assessment

WIC Meeting, Moscow, 27-30 June 2006

Page 5: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Project development plan

Phase Duration Milestones Dates

Kick-off Meeting To

Phase A 4 months PRR To + 4 months

Phase B1 4 months SRR To + 4 months

Phase B1 2 months End B1 To + 2 months

TTo o = 09/2006?= 09/2006?

Time

ID Task Name

1 WSO-FCU Phase A/B1

2 Kick-off

3 Riunione con Team Russo WSO

4 PRR (RA1)

5 ISRR (RA2)

6 Riunione Finale

7 Proj ect Office

8 Project Management (WP 1100)

9 System Engineering (WP 1200)

10 FCU Science Activities (WP 1300)

11 Italian Science with HIRDES & LSS

12 Camera Engineering

13 Management (WP 2100)

14 SF-UV Camera Design & Req. (WP 2200)

15 Design Concept (Phase A)

16 Requirement Definition (Phase B1)17 Schedule & Cost Assessment (Phase B1)

18 LF-UV Camera Design & Req. (WP 2300)

KO

PRR (RA1)

ISRR (RA2)

Riunione Finale

M-2 M-1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12 M13 M14 M15 M16 M17 M18

Page 6: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

FCU Work Breakdown Structure

Page 7: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Cameras: objectives• Definition of cameras performances specifications: iterative process

with science team• Opto-mechanical design of the cameras• Definition of the architecture of the detector (science & availability)

– Geometric characteristics (dimensions, format, pixel size…)– Opto-electronics characteristics (QE, temporal resolution, dynamical

range, operational modes, dark current, read-out noise…)• Definition of mechanisms

– filter wheels– shutters

• Preliminary design of electronics architecture (detector & mechanisms front-end electronics)

• Definition of cameras mass, power and thermal budget• Definition of interface requirements with main frame (optics,

mechanics, electronics, thermal)• Preliminary definition of operational modes of the cameras• Preliminary definition of calibration requirements: pre-flight & in-

flight• Telemetry requirements

WIC Meeting, Moscow, 27-30 June 2006

Page 8: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Cameras: top level requirements

Camera SF-UV LF-UV OC

Wavelength range

110-350nm 110-350nm 250-1000nm

Focal Ratio f/10 f/50 f/50

Field of View ~5’ ~1’ ~1’

Scale 0.15”/pixel 0.03”/pixel 0.03”/pixel

Resolution 0.3” 0.1” 0.1”

WSO-VIL-INST-CNF-0003 (21 Feb 2006)

Page 9: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

FCU accommodation

Page 10: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

FCU constraints definition

• Available volume: =550mm h=170mm

• Power Budget: 51W– 15W Imagers– 36W DHU & PSU

• Mass Budget: 24kg– 2kg per camera– 8kg Imager case– 10kg DHU & PSU

• Optical bench temperature: 20°C (E3°C)

Page 11: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Mechanical Frame• Mechanical Frame Design Concept

– Requirements definition of mechanical frame– Analysis of mechanical interfaces– Analysis of materials– Analysis of masses and volumes– 3D Model

• Thermal Control Design Concept – Requirements definition of FCU thermal control– Analysis of thermo-mechanical interfaces– Analysis of materials

WIC Meeting, Moscow, 27-30 June 2006

Page 12: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Data Handling Unit• Analysis of interfaces requirements

– Requirements of transmission protocol– Requirements of data bus– Definition of packets format– Definition of bit rate– Specification of electrical & mechanical interfaces with

cameras and spacecraft DHU• Analysis of central DHU characteristics

– Definition of handshake sequences– Definition of operational sequences

• Reliability requirements: detection and recovery of failures• Definition of mass and power budget• Environmental requirements (radiation, EMC, thermal,

mechanical…)• SW budget• Specification of telemetry and commands

WIC Meeting, Moscow, 27-30 June 2006

Page 13: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Power Supply Unit• Power budget analysis • Definition of electrical characteristics of

PSU in its various operational modes (Stand-by, normal, peak values, ecc.).

• Definitions of environmental requirements for PSU (temperature, radiation, EMC, vibration, pressure etc…)

• Analysis of power distribution from PSU towards FCU subsystems (cameras, filter wheels, shutters, DHU, etc.)

• Analysis of PSU thermal output

WIC Meeting, Moscow, 27-30 June 2006

Page 14: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Ground Support Equipment

• Definition of subsystem requiring GSE• GSE design concept: definition of requirements

and procedures for FCU pre-flight calibration and definition of in-flight calibrations

• Optical design of OGSE calibration system and proposals for in-flight calibrations

• Definition of interfaces requirements among OGSE, EGSE, MGSE

• Definition of data format, procedures for data archiving, database access, pipeline procedures for data reduction

• Definition of GSE development plan • Costs assessment for realization of PFU GSE

WIC Meeting, Moscow, 27-30 June 2006

Page 15: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

Assembly Integration Verification

• Identify the approach for all the activities for assembling, integrating and verifying the Field Camera Unit in terms of objectives, procedures, facilities, resources e type of test to perform

• The AIV Plan will deal with the activities starting since the delivery of the subsystems (UV cameras Optical camera, mechanical frame,…) until the end of the integration phase and the verification of FCU performances

WIC Meeting, Moscow, 27-30 June 2006

Page 16: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

• Performance requirements– MTF at specified spatial frequencies– Radial energy distribution– Encircled energy at specific wavelengths or numerical aperture

• Focal length• Magnification• Angular or linear field of view• Entrance and exit pupil sizes and locations• Spectral transmission requirements• Image orientation for a given object• Sensor characteristics

– Dimensions– Spectral Response– Element Size and spacing and/or frequency response

• Size, shape, weight limitations• Survival and operating environmental conditions• Interfaces (optical, mechanical, electrical, etc.)• Thermal stability requirements• Duty cycle and useful life requirements• Maintenance and servicing provisions (access, fits, clearances, torquing, etc.)• Emergency or overload conditions• Center of gravity location and lifting provisions• Human-instrument interface requirements (including safety aspects)• Electrical requirements and restrictions (power consumption, frequency, phase, grounding, etc.)• Material selection recommendations and limitations• Finish/color requirements• Inspection and test provisions• Electromagnetic interference restrictions and susceptibility• Storage, packaging, and shipping requirements

Specifications and Constraints for Optical Instruments

Page 17: The Field Camera Unit Project definition, organization, planning S. Scuderi INAF – Catania

• General topics– Focal plane layout, numbers and types of camera, related general question– Optical and mechanical design

• Camera digital interface– Choice between existent MIL1553 interface and other hi-speed interface.– General discussion about cameras protocol with onboard computer

• Camera calibration problem– Flat field calibration problems for optical and UV camera.– Discussion about additional flat field source (optical/UV)

• Optical camera details– Type of detector, general characteristic – Shutter.– Filters.– Analog binning on chip (if CCD chosen)– Pre-flash system (if CCD chosen)– Read-Out speed, ADC– Required temperature for detectors.– Type of cooling system.– Power consumption and dissipation.

• UV camera details– Type of detector, general characteristics– Filters.– Read-Out speed, ADC– Estimation for power consumption