IR CAMERA EUSO BALLOON SPAS-UAH team S. Pérez Cano, H. Prieto, L. Del Peral & M. D. Rodríguez-Frías ORBITAL AeroSpace Company L. Ramírez JEM-EUSO Balloon meeting, November 8-9, 2012 SENSIA IR Company F. 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 FactorValue Altitude40km Pressure3mbar Energy RangeThermal Infra Red (TIR) Optical SubsystemDevoted for missions objectives Frame Rate1Hz (TBD) Wavelength Range( )µm IR Bands 10.8 & 12 µm (TBC) Absolute Temperature AccuracyTBD FoVTBD (depending on the final mechanical box location) Angular ResolutionTBD Temperature Measurement( ) K Power (Including 20% margin)30 W Digitalization12 Bits (TBC) Operating Duty Cycle1/2 days (TBC) Operating TemperatureRange within -30°C/+55°C Mass MemorySolid State memory (TBC) Power SupplyIR Camera Battery pack 28V Service ElectronicsTBD Control InterfaceTBD Size (Including 20% margin)300x400x500 mm Weight (Including 20% margin)16kg (TBC) Data LinkInternal storage (TBC)

Baseline COTS IR Camera Detector (UL 04171) Technology  -Si Manufacturer: ULIS Proximity electronics and Signal digitalization Resolution: 640x  m, 16bits NETD < 120mK Frame Rate: 1 FPS (TBD) Power consumption: <300 mW (without TEC)

Baseline COTS IR Camera Operational Bands Band 1: CWL: (+0, -0.2)  m; (TBC) FWHM: 0.85 ± 0.1  m Transmittance > 80; Transmittance Rejection Band: 7 to 10.0  m < 0.01; 11.4 to 20  m < 0.01 Band 2: CWL: (+ 0.2, -0)  m (TBC) FWHM: 0.85 ± 0.1  m Transmittance > 80 Transmittance Rejection Band: 7 to 11.3  m < 0.01; 12.7 to 20  m < 0.01

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)  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 12hIR Camera PWP 24h Altitude40km Pressure3mBar Power30W/25.71Ah, 28V30W/51.5Ah, 28V Operation Duty12h (R )24h (R ) Operating Temperature Range within -40˚C/+70˚C Size(250.2x100.8x170)mm(500.4x100.8x170)mm Mass4.8kg9kg

IR Camera Battery Pack connection diagram

IR Camera Battery Pack 12 h Component Battery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours) Battery Selection 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 mm Battery Box IR Camera mm mm 170 mm Lateral mm 170 mm Mass Calculations Density = Aluminum Box = 2.69g/cm3 = g/mm3 Thickness = 3mm Lateral Sides Volume = LSV=170mm*100.08mm*3mm*2* g/mm3 = 275g Upper and Under Side Volume = USV =250.2mm*100.08mm*3mm*2* g/mm3 = g Front and Rear Side Volume = FBV= mm*170mm*3mm*2* g/mm3 =275g Total Case Mass = LSV + USV + FBV = = 1kg TOTAL MASS INCLUDING CELLS AND CASE = (10Cells*300g) + (Case Mass = 1kg) = 4kg+20% of margin = 4.8kg

IR Camera Battery Pack 24 hrs Component Battery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours) Battery Selection 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 mm Battery Box IR Camera 500.4mm mm 170 mm Lateral mm 170 mm Mass Calculations Density = Aluminum Box = 2.69g/cm3 = g/mm3 Thickness = 3mm Lateral Sides Volume = LSV=170mm*100.08mm*3mm*2* g/mm3 = 275g Upper and Under Side Volume = USV =500.4mm*100.08mm*3mm*2* g/mm3 = 808.3g Front and Rear Side Volume = FBV= mm*170mm*3mm*2* g/mm3 =275g Total Case Mass = LSV + USV + FBV = = 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 G62/1.2 Option 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 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