PAYLOAD ÓPTICO 3U PARA OBSERVAÇÃO DA TERRA
The Opto S&D Earth Observation 3U Optical Payloads for Small Satellites and CubeSats is a family of space cameras that uses the most flight proven technologies present on high performance platforms. All family members share the same electronics, interface, command and control language, processing and storage, and mechanical chassis, everything self-contained in a 3U space, designed for 6U CubeSats or similar platforms.
MAIN FEATURES
- Fully operational camera in a 3U envelope, self contained with camera management, thermal control, optical system, image processing and storage unit
- Capable to operating on several LEO orbits, from 400 to 800km, polar or equatorial
- Ground resolution of about 3.5m, 6.8m or 20m @500km LEO, swath of 14.4km, 28km or 80km
- Fully reflexive optical system: “Mini-Korsch” and off-axis TMA. Composed by asphericals mirrors with low TCE ceramic substrate, carefully mounted and aligned on a matched metallic chassis, isostatic mounting regarding camera main structure
- “Push Broom” TDI sensor allowing acquisition of targets at low radiometric intensity, low illumination, up to 256 taps, for each band
- Designed to operate on four spectral bands (R, G, B, and NIR), each one in a TDI set, allowing multispectral coverage
- TDI sensor with programmable acquisition time, integration time, and TDI lines, allowing good adjustment of image acquisition
- TDI sensor and optical structures mounted on the same chassis
- Thermal focusing mechanism mounted on the optical train, allowing fine tune of focal position and best image capture
- Low power active thermal control, based on heaters and thermistors located on especially selected points in the optical system allowing performance stability and active control on optical alignment.
- Programmable power supply with peripheral on/off capabilities, allowing multiple operational modes in power management combined with mission schedule.
- All internal voltages are generated on board from a single common input power line.
- Mission planning capabilities in internal processor with RTC, image storage, pre and post processing for later deployment.
- Nine operating modes allowing better power management to reduce system consumption and flexibility on mission planning: acquisition, transmission, processing, data formatting, image processing, image compression, focus adjustment, and stand-by.
- One “direct” operation mode to explore high bandwidth “live” direct video.
- Main clock generator with variable range and fine tuning programing, allowing precise TDI adjustment on-orbit.
- Image storage unit capable of image acquisition and processing for later transmission.
- Onboard image deconvolution preprocessing allowing compensation for the diffraction effect due to small optical aperture.
- FPGA processing on board for image diffraction correction, preprocessing and compression, data pack and auxiliary data formatting.
- CAN bus interface for fast communication with satellite main bus TM/TC and command/control
- High speed dedicated video data interface with transmitter.
- CPU main board, camera management, watchdog, TM/TC processing allows complete camera management and control. High level on board command language, facilitates to program scheduled events, adjust parameters, selection of performance and data format, telemetry on internal conditions and processing options.
- CAN interface and control variables available on user mapped CAN address space, to allow user direct acquisition, direct setup and status request of critical configuration data, camera parameters, temperatures, errors and recovery information.
- Onboard image storage and data pack compression allowing transmission on reduced radio band links.
- Deployable Baffle for stray light control.
- Customizable optical performance, resolution, swath, detector, spectral bands, and processing. Features can be evaluated upon request.
MODELS DATASHEET
Model |
Mini-Korsch |
E3UCAM |
NanoMUX |
| Optical Layout |
TMA on–axis Korsch |
TMA on–axis Korsch |
TMA off–axis |
| Input optical aperture |
82mm x 120 mm |
φ82mm |
φ35mm |
| Resolution (GSD@orbit) |
≈3.5m @ 500Km |
≈6.8m @ 500Km |
≈20m @ 500Km |
| F-number effective |
9.4 |
5.6 |
4.5 |
| Swath across track @ orbit |
≈14.4Km @ 500Km |
≈28Km @ 500Km |
≈80Km @ 500Km |
| EFL |
~770mm |
~396mm |
~143mm |
| Sensor |
4096 x 5.4μm / TDI x 256 |
4096 x 5.4μm / TDI x 256 |
4096 x 5.4μm / TDI x 256 |
| Bands |
RGB-NIR (TDI) |
RGB-NIR (TDI) |
RGB-NIR (TDI or CCD) |
| Optical MTF @ Nyquist |
0.40 |
0.40 |
0.7 |
| NIIRS |
~2.0 |
~1.1 |
Not applicable |
| System MTF |
~0.15 |
~0.14 |
~0.25 |
|
Applications |
Tactical, law enforcement, city planning | Law enforcement, natural resources, city planning |
Environment monitoring, agro yield evaluation , forest monitoring |
GENERAL CHARACTERISTICS COMMON ON ALL MODELS
Characteristics |
Specification |
Comment |
| Dimensions |
100 x 100 x 340 mm |
3U compatible |
| Mass |
< 4 kg |
value depends on configuration |
| Power Supply Voltage |
12 to 24V |
Single voltage input line, internally generated working voltages |
| Power consumption @ 12V |
< 15 W |
maximum power due management using 9 operating modes |
| Spectral bands |
4 customer specified Bands |
400nm ~1000nm range available upon request |
| Sensor |
CCD 4096 pixels, 5.4μm, TDI x 256 , 4 bands |
primary option , other sensor available upon request |
| Electrical Interface |
CAN, power, Video |
Located on back side 3U, ICD upon request |
| Video Signal Coding |
10 bits |
primary option, other codding available upon request |
| Video Data rate (max, no compression) |
~336 Mbps |
programable, QPSK primary, other codding available upon request |
| Video Data rate (video output data compressed 4x) |
~84 Mbps |
Programable, Selectable by compression ratio or transmitter handshake |
| Storage memory |
32 Gbits |
depends on configuration, data pack format |
| Thermal control |
Active on optical system |
Thermal Radiator |