HyperSTREEGO A Reactive Multispectral Optical Payload for Small Satellites

Transcription

1 Driving Innovation in Space Optics and Optical Systems HyperSTREEGO A Reactive Multispectral Optical Payload for Small Satellites Giovanni Bianucci 1

2 Introduction Demand for remote sensing data is increasing rapidly Earth observation with frequent revisits is expensive Costs include the satellite, launch, monitoring operations, data processing But, computing power has increased by Moore s Law And, has decreased computing power consumption ~ ~ ~ The HyperSTREEGO concept makes use of this by combining: 1. Wide FoV multispectral optics - HyperScout 2. On-board compute power and, 3. High resolution multispectral EO optics STREEGO HyperSTREEGO is an autonomous early warning optical payload system 2

3 HyperSTREEGO technology STREEGO STREEGO is a high-resolution multispectral imager with a hyperspectral upgrade 1.4 / 2.7 m GSD (300 / 600 km orbit) 11 km swath (with 20 km option) 9 bands in nm (upgradable to 40) HyperScout HyperScout is a miniaturized wide field-of-view hyperspectral sensor with real-time image processing capability 40 / 80 m GSD (300 / 600 km orbit) 700 km swath (in Panorama configuration) 80 bands in nm 3

4 STREEGO STREEGO is a Multispectral Earth Observation Payload for Small Sat platforms * with an easy upgrade path to Hyperspectral capability * Headline Specifications Panchromatic 1.4 m 300 km orbit 2.7 m 600 km orbit Swath up to 425km orbit Multispectral 9 bands nm 40 bands - upgradable Payload mass 19 kg Power budget 48 W Rendering of STREEGO on a Small Sat platform 4

5 Coverage of the Most-demanded Applications Panchromatic Multispectral Hyperspectral STREEGO Multispectral FORESTRY AGRICULTURE HYDROLOGY SURVEILLANCE RESOURCES MONITORING URBAN DEVELOPMENT TOPOGRAPHY Panchromatic GSD [m] STREEGO covers Agriculture, Infrastructure Development, Disaster Monitoring and others 5

6 New Technologies and Solutions Bonnet polishing New CTE matched alloys Aspheric surfaces Large format CMOS sensors Passive thermal control Accurate metrology Adoption of new technologies and design solutions addressing a market segment that requires medium-high resolution payloads for agriculture, topography, security, infrastructure dev, etc. 6

7 High-performance TMA unobscured Optics Aperture 200 mm F/no. 6.0 FOV x GSD 2.75 m Nyquist > 64 % SNR (Pan) > 100 MS Channels 9 (Ref. Sentinel 2) Mirrors DoF Tolerance Range Dxy ± mm Dz ± mm Dq x Dq y ± Driving design parameters imposed by system requirements, such as resolution, field of view, SNR, and multispectral capability, inclusive of sensitivity manufacturing and integration tolerances. 7

8 CTE-matched Mirror Technology Primary Mirrors made of Nickel-Phosphor coated Aluminum New material, designed for space applications Tertiary Secondary Light-weighted structure Ag/SiO 2 reflective coating Shape accuracy < 20 nm RMS Roughness 1 nm RMS Media Lario in-house capability 8

9 STREEGO Focal Plane and Main Electronics Electrical architecture characterized by very few interfaces, low on-board processing complexity, and by the adoption of commercial components and CMOS technology. Credit: Techno System Developments Pixel rate: Mpx/s (10 bit /px) Frame rate: 4096x fps (10 bit /px) Pixel size: 5.5 µm Pixel Res.: 8, 10 and 12 bit Exp. Time: Min. 92us with 0.1us steps (10 bit /px) I/F: RS-644 LVDS SerDes Video Data Redundant CAN bus I/F RS-644 LVDS External trigger input 2 Heaters + 3 Thermistors Memory: 512Mbyte of SDRAM Power: VDC and 17W@28V Volume: FPA 110x92.5x25mm 3 Mass: Main elect: 262x216x25mm g including 20% contingency 9

10 STREEGO Integrated System Athermal optical system realized with CTE-matched RSA443 Aluminum mirrors and structure Mass 19 kg 1 st Eigenfrequency > 170 Hz Volume envelope L 541, W 513, H 308 mm Design temp. 20 C Operating Temp C Non-operating temp C Thermal control Passive System WFE 45 nm RMS Front view of STREEGO EM showing the stray light baffle 10

11 HyperScout Hyperspectral Imager HyperScout is a miniaturized hyperspectral imager, developed by cosine measurements system, with on-board data handling system for real-time L2 image processing Credit: Cosine Measurement Systems FOV 31 x 16 GSD Swath Active resolution Spectral range / resolution (high res) Spectral range/ resolution (ext range) 80 m 350 km ~ 4000x2000 px nm / 5 nm nm / 12 nm SNR ~100 Mass Volume Average power 1.2 kg 1.2 l 10 W 11

12 HyperScout Panorama Panorama is a quad configuration of Hyperscout for very wide field of view Two HyperScouts in VNIR range used to double the swath and derive level 2 geophysical information in real time Two HyperScouts in the SWIR range used to identify the cloud free pixels to be used for processing As such, Panorama is a view finder with 80 m GSD over a combined swath of 700 km Credit: Cosine Measurement Systems 12

13 HyperSTREEGO Configuration HyperSTREEGO is a combination of high resolution camera (STREEGO) with wide swath, 45 forward looking viewfinder (Panorama) with sophisticated on-board image processing. High-res camera The result: Space-borne autonomous sensor Forward looking wide FoV sensor capable of finding ground anomalies (forest fires, floods, land slides, etc.) With high-res optics to capture events and transmit only the images of interest. 45 forward looking viewfinder Rendered Image of STREEGO multispectral EO payload and Panorama viewfinder on a satellite platform 13

14 HyperSTREEGO in orbit operation Credit: ESA HyperScout points forward 45 along track, 1 min earlier than STREEGO nadir s coverage Panorama spots changes or anomalies in 40 s over a 700 km swath Platform re-points STREEGO field of view on anomaly in 20 s (max ±30 across track at >1 /s) High resolution multispectral images taken, and transmitted with anomaly warning Result is a low bandwidth early detection system, minimizing ground-support cost 14

15 Extended Coverage Credit: ESA Panorama s wide FoV allows to overlap the ground tracks of two satellites in the same orbit Complete coverage of an area such as the whole of Europe in only four hours 15

16 Earth Coverage Capability 2 days with two satellites 5 days with one satellite Credit: ESA 16

17 Shorter Revisit Time An example constellation : Four HyperSTREEGO satellites Two satellites per orbit Two orthogonal orbital planes An area like Europe covered twice a day First coverage from 8:30 to 12:30 Second coverage from 12:30 to 17:30 Credit: ESA Maximum coverage achieved with a minimized constellation size 17

18 Summary << Wide swath >> and High resolution Credit: DigitalGlobe Credit: ESA First to See & First to Know Credit: DigitalGlobe 18

19 Authorship Credits HyperSTREEGO: A Reactive Payload G. Bianucci (a), I. Ferrario (a), M. Rossi (a), A. Ritucci (c), M. Terraneo (a), F. E. Zocchi (a), S. S. Conticello (b), M. Esposito (b), L. Maresi (c), A. Zuccaro Marchi (c), M. D. Miranda (c)(d), S. K. Mahalik (c)(d), G. Capuano (e), G. Formicola (e), P. Longobardi (e) (a) Media Lario (b) cosine measurement systems (c) ESTEC (d) ATG Europe (e) Techno System Developments 19

20 Thanks to our Partners Driving Innovation in Space Optics and Optical Systems Media Lario S.r.l. Località Pascolo Bosisio Parini (LC), Italy Ph: Fax: and thanks to you 20