IR CAMERA EUSO BALLOON

SPAS-UAH team

S. Pérez Cano, H. Prieto, L. Del Peral & M. D. Rodríguez-Frías

ORBITAL AeroSpace CompanyL. Ramírez

JEM-EUSO Balloon meeting, November 8-9, 2012

SENSIA IR CompanyF. Cortés

Outline

•Mission objectives

• IR CAM technical specifications

•Baseline IR Camera

•Backup IR Camera

•Power Battery Subsystem

•IR Camera development plan

•Work plan and objectives

Mission Objectives

To validate the IR camera mission concept.

To obtain real data with a micro bolometer IR camera.

To assess the wavelength bands and filters selection

To validate and optimize Temperature Retrieval Algorithms.

To validate and optimize Stereo Vision Technique.

To validate and assess part of Calibration Strategy (TBC)

IR Camera EUSO Balloon Technical Specifications

Factor ValueAltitude 40km

Pressure 3mbar

Energy Range Thermal Infra Red (TIR)

Optical Subsystem Devoted for missions objectives

Frame Rate 1Hz (TBD)

Wavelength Range (10-12.5)µm

IR Bands 10.8 & 12 µm (TBC)

Absolute Temperature Accuracy TBD

FoV TBD (depending on the final mechanical box location)

Angular Resolution TBD

Temperature Measurement (220-320) K

Power (Including 20% margin) 30 W

Digitalization 12 Bits (TBC)

Operating Duty Cycle 1/2 days (TBC)

Operating Temperature Range within -30°C/+55°C

Mass Memory Solid State memory (TBC)

Power Supply IR Camera Battery pack 28V

Service Electronics TBD

Control Interface TBD

Size (Including 20% margin) 300x400x500 mm

Weight (Including 20% margin) 16kg (TBC)

Data Link Internal storage (TBC)

Baseline COTS IR Camera

Detector (UL 04171)

Technology-SiManufacturer: ULISProximity electronics and Signal digitalizationResolution: 640x480-25m, 16bitsNETD < 120mKFrame Rate: 1 FPS (TBD)Power consumption: <300 mW (without TEC)

Baseline COTS IR Camera

Operational Bands

Band 1:CWL: 10.80 (+0, -0.2) m; (TBC)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: 12.00 (+ 0.2, -0) m (TBC)FWHM: 0.85 ± 0.1 mTransmittance > 80Transmittance Rejection Band: 7 to 11.3 m < 0.01; 12.7 to 20 m < 0.01

Baseline COTS IR Camera

Baseline COTS IR Camera

GPS? Possible link (cable, wifi)?

Baseline COTS IR Camera

Data Manage and Storage Subsystem

CPU: VIA EITX-3000

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

Watchdogs timers

OS: Linux Debian “Squeeze” (6.0.6) (TBC)

Backup COTS IR Camera option

IRX Camera

Backup COTS IR Camera option

Backup IR Camera “IRX Camera”

Main Advantages:

Detector ULIS (IRCAM main mission representative) ITAR free (Canadian supplier) Heritage @ IAC

Drawback:

Data interface with CPU Back up solution FLIR Photon 640

Backup IR Camera “IRX Camera”

Preliminary 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 thermal control (TBC)

EUSO Balloon Gondola

IR Camera Battery Pack technical specifications

IR Camera PWP 12h IR Camera PWP 24h

Altitude 40km 40km

Pressure 3mBar 3mBar

Power 30W/25.71Ah, 28V 30W/51.5Ah, 28V

Operation Duty 12h (R-5.3.8-1) 24h (R-5.3.8-1)

Operating Temperature

Range within -40˚C/+70˚C Range within -40˚C/+70˚C

Size (250.2x100.8x170)mm (500.4x100.8x170)mm

Mass 4.8kg 9kg

IR Camera Battery Pack connection diagram

IR Camera Battery Pack 12 h

ComponentBattery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours)Battery SelectionCapacity @ 12hours = (30W/28)*(24h) = 25.71Ah•1of 10 Cell Series Saft G62/1.2 = 34.5Ah

* Calculations over 24 hours instead of 12 to guarantee the operation of the IR camera PWP

IR Camera Battery Pack Mechanical Architecture 12 h

Upperside and Under side

Front Side and Rear

Side

100.08 mm

Battery BoxIR Camera

250.2 mm

100.08 mm

170 mm

Lateral

100.08mm

170 mm

Mass Calculations

Density = Aluminum Box = 2.69g/cm3 = 0.00269g/mm3

Thickness = 3mm

Lateral Sides Volume = LSV=170mm*100.08mm*3mm*2*0.00269g/mm3 = 275g

Upper and Under Side Volume = USV =250.2mm*100.08mm*3mm*2*0.00269g/mm3 = 404.14g

Front and Rear Side Volume = FBV= 100.08mm*170mm*3mm*2*0.00269g/mm3 =275g

Total Case Mass = LSV + USV + FBV = 275+ 404.14 + 275 = 1kg

TOTAL MASS INCLUDING CELLS AND CASE = (10Cells*300g) + (Case Mass = 1kg) = 4kg+20% of margin = 4.8kg

IR Camera Battery Pack 24 hrs

ComponentBattery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours)Battery SelectionCapacity @ 24hours = (30W/28)*(48h) = 51.5Ah•2of 10 Cell Series Saft G62/1.2 = 69Ah

*48 hrs instead of 24 to guarantee the operation of the IR camera PWP

IR Camera Battery Pack Mechanical Architecture 24hrs

Upperside and Under side

Front Side and Rear

Side

100.08 mm

Battery BoxIR Camera

500.4mm

100.08 mm

170 mm

Lateral

100.08mm

170 mm

Mass Calculations

Density = Aluminum Box = 2.69g/cm3 = 0.00269g/mm3

Thickness = 3mm

Lateral Sides Volume = LSV=170mm*100.08mm*3mm*2*0.00269g/mm3 = 275g

Upper and Under Side Volume = USV =500.4mm*100.08mm*3mm*2*0.00269g/mm3 = 808.3g

Front and Rear Side Volume = FBV= 100.08mm*170mm*3mm*2*0.00269g/mm3 =275g

Total Case Mass = LSV + USV + FBV = 275+ 808.3 + 275 = 1.35kg

TOTAL MASS INCLUDING CELLS AND CASE = (20Cells*300g) + (Case Mass = 1.35kg) = 4kg+20% of margin = 9 kg

Battery Cells, Connectors and Cables

•Cells

•Connectors

•Cables

Option I: In case of 30W /12hrs power consumption it will be necessary 10 cells of Saft G62/1.2Option II: In case of 30W /24hrs power consumption it will be necessary 20 cells of Saft G62/1.2

The Connectors we are going to use are 9 pins D-Sub connectors for all interfaces and subsystems.

The Cables we are going to use are THERMAX MIL-DTL-22759/91,92 for all interfaces and subsystems.

Battery Voltage Regulator and Fuses

•Voltage Regulator

•Fuses

Selected fuses are Thermal Fuse Klixon C Series and MIL-PRF-23419 Space Coast IC

The Voltage regulator suitable for this project is the Military grade LM317/Texas Instruments

Preliminary Budgets

Preliminary estimation has been done and reported:

SIZE 300 x 400 x 500 mm3 MASS 16 Kg POWER 30W

Updated budgets will be provided during Phase B study. A reduction of the allocated budget is foreseen.

Functional Requirements

The EUSO Balloon IR camera shall be designed as the lower cost hardware but sufficient for mission objectives. Moreover, this hardware will be reusable for all the balloon campaign opportunities, including possible standalone campaigns.

IR Cam development Plan

Due to the utilization of COTS equipment, it is foreseen to build the EUSO balloon IR camera flight hardware assembly. The flight hardware shall be qualified for the environmental constrains of the balloon campaign. This approach can be considered similar that the Proto-Flight unit in a Space Mission.

The foreseen qualification facilities are placed on the Instituto Nacional de Técnica Aeroespacial (INTA).

All the components will be ITAR free

The Mechanical box will be designed to fulfill waterproof requirement.

The EUSO balloon IR camera will be qualified and validate according to the environmental constrains of the Balloon Flight Campaign.

Work Plan and objectives

To assess a technical solution of the IR Camera To Verify the IR filter availability Optical Design similar to FM? To Analize and study the Environmental operating condition of the commercial cameras To Define an image acquisition strategy (similar to FM?) To study the IR Calibration operation To evaluate the impact of a Day-light Flight Radiative Algorithms and StereoVision method Plan? Define the I/F Budgets reduction

Questions?

Thanks for your attention