CSDA Vendor - Teledyne Brown Engineering
NASA's Commercial Satellite Data Acquisition (CSDA) program has acquired commercial datasets from Teledyne Brown Engineering for scientific purposes.
Teledyne Brown Engineering operates the German Aerospace Center Earth Sensing Imaging Spectrometer (DESIS). DESIS is a push broom, hyperspectral instrument currently installed on the Multi-User System for Earth Sensing (MUSES) platform on the International Space Station. DESIS has the capability of recording hyperspectral image data using 235 closely arranged channels.
Authorized Data Use and Users
All members of the U.S. Government and researchers funded by the U.S. Government have access to DESIS data and imagery.
End User License Agreement
Obtaining Data
To request access to DESIS data:
- Contact NASA's Commercial Satellite Data Acquisition (CSDA) program and provide a name, email address, and other pertinent information (grant number, contract number, etc.) for data access approval and accept Teledyne Brown Engineering’s EULA
Copyright
Data products and derivatives must contain the following copyright markings (where YYYY is the year of the image acquisition):
- For DESIS data: “© Teledyne Brown Engineering, Inc., YYYY. All Rights Reserved.”
- For derivatives: "Includes copyrighted material of Teledyne Brown Engineering, Inc., All Rights Reserved.”
- A joint copyright notice may be used as appropriate
Authorized users should send Teledyne Brown Engineering a courtesy copy of any publications that include the downloaded data.
CSDA Acknowledgment
To help CSDA identify your publications, we request that you include the following acknowledgment when publishing work created using these data:
"This work utilized data made available through the NASA Commercial Satellite Data Acquisition (CSDA) program."
Current Research Using Teledyne Brown Engineering Data
K. F. Huemmrich
2022
Evaluating approaches relating ecosystem productivity with DESIS spectral information
K. F. Huemmrich
2022
Plant Characteristics, Primary Production
Teledyne Brown Engineering Commercial Data
DESIS Performance Specifications
| Parameter | DESIS values (Commissioning Phase) |
|---|---|
| Orbit (type, local time at equator, inclination, altitude, period, repeat cycle) | not Sun-synchronous, various, 51.6°, 405 ± 5 km, 93 min, no repeat cycle |
| Coverage | 55° N to 52° S |
| Tilt (across-track, along-track) | -45° to +5°, -40° to +40° by MUSES and DESIS |
| Sensor pointing | ±15° along-track to enable BRDF or Stereo acquisitions |
| Spectral coverage | 402 nm to 1000 nm |
| Number of spectral channels | 235 (no binning) ~2.5nm 118 (binning 2) 79 (binning 3) 60 (binning 4) ~10nm, this product will be available June 2019 |
| Defective spectral channels | Bands 1–7 (no binning) Bands 1–4 (binning 2) Bands 1–3 (binning 3) Bands 1–2 (binning 4) |
| Spectral sampling resolution | 2.55 nm (w/o binning); ~10.2 nm (binning 4) |
| Full Width Half Maximum (FWHM) | ~3.5 nm (w/o binning); ~10.0 nm (binning 4) |
| Radiometric resolution | 12 bits + 1 bit gain |
| Radiometric accuracy | +/-10% (based on on-ground calibration and with the support of inflight radiometric calibration) |
| Radiometric linearity | 99% |
| Swath | 30 km |
| Spatial resolution, pixels | 30 m, 1024 pixels (@400 km) |
| Geometric accuracy | ~20 m with GCPs1 ~300 m - 400 m w/o GCPs |
| MTF @ Nyquist | 30%–40% based on on-ground calibration / static MTF without smearing effects / wavelength depending |
| Signal-to-Noise ratio (albedo 0.3 @ 550 nm) | 195 (w/o binning) 386 (4 binning) (based on on-ground calibration) |
| Dark/Read noise (electrons) | 30–60e- (global shutter) 15–30e- (rolling shutter) |
| Quantum scale equivalent (e-/DN) | 0.04 e-/DN |
| Max frame rate | 235Hz (@235 spectral lines, rolling shutter) 117Hz (@235 spectral lines, global shutter) |
| Solar zenith angle restrictions (for L2A level processing) | > 55° produces reduced quality L2A product > 65° produces low quality L2A product > 70° not processable to L2A |