IR CAMERA EUSO BALLOON

JEM-EUSO Balloon CDR, CNES, Toulouse. December 18, 2012

José Santiago Pérez Cano. Orbital Aerospace, Madrid, Spain.Héctor Prieto, L. Del Peral & M. D. Rodriguez Frias. UAH, Madrid, Spain. http://spas.uah.es

Outline

•1st Flight Mission objectives

•IR Camera

•Mechanical configuration

•Thermal configuration

•Power Battery Subsystem

•IR Camera Budgets

•IR Camera schedule

1st Flight Mission Objectives To validate the IR camera mission concept

To obtain real data with ULIS UL 04171 micro bolometer IR camera

To assess the wavelength bands and filters selection 8.55 m band IR camera funding achieved to be on the 1st flight and test the 8.55 m filter band for the IR camera/JEM-EUSO baseline

To validate and optimize Temperature Retrieval Algorithms

To validate and optimize Stereo Vision Technique

To validate and assess part of Calibration Strategy (Shutter)

IR Camera

Detector (UL 04171)

Technology-SiManufacturer: ULISProximity electronics and Signal digitalizationResolution: 640x480-25m, 16bitsNETD < 120mKFrame Rate: 0,5 FPSPower consumption: <300 mW (without TEC)

IR CameraOperational Bands

Band 1:CWL: 10.80 (+0, -0.2) m FWHM: 0.85 ± 0.1 mTransmittance > 80;Transmittance Rejection Band: 7 to 10.0 m < 0.01; 11.4 to 20 m < 0.01

Band 2:CWL: 8.55 (+ 0.2, -0) mFWHM: 0.85 ± 0.1 mTransmittance > 80Transmittance Rejection Band: 7 to 11.3 m < 0.01; 12.7 to 20 m < 0.01

FOV≈12º

COTS IR Camera

ICU(CPU/MEM)

DC/DCconverter

IRX CAM640

FILTER1

FILTER 2

OPTICS

Battery PackSensors

On/offStatusleds

External power supply connection

Ethernet connection

Alluminium panel

12V

12V

5V

28V

IR Camera

Data Management and Storage Subsystem

CPU: TX-7800, with a TS-ETH10 expansion board by means of PC104 bus

Redundant storage system: 2 mirrored flash memory hard disks (Innodisk)

Watchdogs timers

OS: Debian Linux (Kernel 2.6)

Sensors: Temperature, Humidity and Presure digitizer board (TS-ADC24 board)

Baseline COTS IR Camera

IRX Camera

IR Camera

Mechanical Configuration

EUSO IR Camera accomodation

Located on the external side of the Gondola Totally isolated Autonomous batteries

EUSO IR Camera mechanical booth

Withstand environmental conditions Water proof Passive (alluminium panel radiator) and active thermal control (heater) EUSO Balloon Gondola

Mechanical Configuration

Mechanical Configuration

Complete system weight: 27.6 kg

15g (vertical) scenario

Weight @ 15g = 27.6x15 = 414 kg.

6x3 screw option:

Weight supported per screw: 414/18 = 23 Kg per screw

5x3 screw option:

Weight supported per screw: 414/15 = 27.6 Kg per screw

Thermal ConfigurationRadiator: emissivity 0,15

IR Earth load: 260W/m2Albedo: 0,12

Internal dissipation:-Camera 7.8W-CPU 5W-DCDC 5W-Other 2W

Housing-radiator: 300W/m2.K

Housing: emissivity 0,715mm thick Alu

Heat sinks:-Air @ -80ºC (0.0202 W/mK)-Space@-270ºC (View factors computed in ESARAD)

Thermal ConfigurationCold Case:-Operational, steady state-Night observation

Temperatures:-Camera 22ºC-CPU 14ºC-DCDC 14ºC

Thermal ConfigurationHot Case:-Non operational, steady state-No observation This thermal

case includes solar fluxes

IR Camera Battery Pack technical specifications

IR Camera PWP 24h

Altitude 40km

Pressure 3mBar

Power 30W/25.71Ah, 28V

Operation Duty 24h (R-5.3.8-1)

Operating Temperature

Range within -40˚C/+70˚C

Size (230x145x160)mm

Mass 5kg

IR CAMERA Budgets

Preliminary estimation has been done and reported:

SIZE 235 x 240 x 270 mm3 MASS 27.6 Kg POWER 30W

Functional Requirements

The EUSO Balloon IR camera subsystem will be reusable for all the balloon campaign opportunities.

IR Camera Schedule

IR CAM MILESTONES DATE

PDR/CDR December 18th @ CNES

Filter fabrication January 2013

Hardware assembly June 2013

Testing July 15th 2013

FM delivery September 15th 2013

FIRST EUSO-BALLOON FLIGHT

SPIRING 2014 @TIMMING, ONTARIO (CANADA)

Questions?

Thanks for your attention