IR CAMERA EUSOBALLOON JEM-EUSO Balloon meeting, November 8-9, 2012 SPAS-UAH team S. Pérez Cano, H. Prieto, L. Del Peral & M. D. Rodríguez-Frías ORBITAL AeroSpace Company L. Ramírez SENSIA IR Company F. Cortés
Outline • Missionobjectives • IR CAM technicalspecifications • Baseline IR Camera • Backup IR Camera • PowerBatterySubsystem • 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)
Baseline COTS IR Camera Detector (UL 04171) Technology-Si Manufacturer: ULIS Proximity electronics and Signal digitalization Resolution: 640x480-25m, 16bits NETD < 120mK Frame 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 m • Transmittance > 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 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 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
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 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 • Capacity @ 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
Battery Box IR Camera Upperside and Under side Lateral 100.08 mm 170 mm 250.2 mm 100.08mm 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 100.08 mm Front Side and RearSide 170 mm
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 • Capacity @ 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
Battery Box IR Camera Upperside and Under side Lateral 100.08 mm 170 mm 500.4mm 100.08mm 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 100.08 mm Front Side and RearSide 170 mm
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 The Voltage regulator suitable for this project is the Military grade LM317/Texas Instruments Selected fuses are Thermal Fuse Klixon C Series and MIL-PRF-23419Space Coast IC
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
Thanks for your attention Questions?