DEIMOS-2 is a Very-High Resolution (VHR), multispectral, agile satellite capable of providing 75-cm pan-sharpened imagery.
The Ground Sampling Distance (GSD) is 1.0 m for the Panchromatic channel and 4.0 m for the Multispectral channels. DEIMOS-2 standard pan-sharpened product (ortho) has a pixel size of 75 cm, after re-sampling. All resolutions refer to at Nadir observation conditions. Products with other spatial resolutions and resampling are available under request.
The DEIMOS-2 system includes panchromatic and multispectral cameras, acquiring data simultaneously. The multispectral capability includes 4 channels in visible and near infrared spectral range (red, green, blue, and NIR). The spectral range of each band is listed below:
560 nm to 900 nm
Blue: 466 nm – 525 nm
Green: 532 nm – 599 nm
Red: 640 nm – 697 nm
NIR: 770 nm – 892 nm
Temporal Resolution: Revisit Time
In order to minimize the revisit time, DEIMOS-2 is configured to have ±45 degrees off nadir pointing capability. With maximum tilt, the field of regard (FOR) can be extended to more than 600 km from nadir. The average global revisit time (±45 degrees) is 2 days.
DEIMOS-2 has four imaging modes: single strip imaging, multi-pointing imaging, single-pass stereo imaging and tessellation imaging:
Single Strip Imaging
12 km wide and up to 1,400 km long image. The satellite has a ±45 degrees across-track tilting capability (being ±30 degrees the nominal range).
DEIMOS-2 is capable of performing multi-pointing imaging, switching from one target to another with minimum idle time.
Single Pass Stereo Imaging
Two acquisitions of the same area in the same orbit, with different pitch angles. Images are 12-km wide and up to 200 km long. The viewing angles are different for the two images, in order to allow the generation of 3D models.
Two acquisitions of the same area in the same orbit, with different pitch and roll angles. Images are 24-km wide and up to 200 km long (composed from the acquisition of two adjacent strips, 12-km wide each, and captured with a lag of a few seconds).
DEIMOS-2 has a capacity to capture up to 200,000 Km2 per day. The data volume is managed using a 256 Gbits (32 Gbytes) storage capacity using SDRAM memory devices, which allows to image a ground strip longer than 1,400 km in a single pass. Data are downloaded using a 160 Mbps X-band Image Transmission Unit (ITU).
- Pan-sharpened: a four-band image, resulting from adding the information of each multispectral band to the panchromatic band. The fusion does not preserves all spectral features of the multispectral bands, so it should not be used for radiometric purposes.
- Panchromatic: a single-band image coming from the panchromatic sensor.
- Multispectral: a four-band image coming for the multispectral sensor, with band co-registration.
- Bundle (Panchromatic + Multispectral bands): a five-band image containg the panchromatic and multispectral products packaged together, with band co-registration.
- Stereo Pair: The image products obtained from two acquisitions of the same target performed from different viewpoints in the same pass by using the agility feature of the platform. It can be provided as a pair of pan-sharpened or panchromatic images.
All products are generated at 10 bits, but can be provided at 8-bits format upon Customer’s request.The following table resume the nomenclature used to define DEIMOS-2 standard products.
|Pan-sharpened 4 bands
Pan-sharpened 321 Natural Colors
Pan-sharpened 432 False Colors
|Multispectral||MS4||4 Multispectral files only|
|Bundle||PM4||Bundle (Pan + Multispectral)|
Table 1: DEIMOS-2 Product Type Naming Convention
DEIMOS-2 products are available in two different processing levels:
A calibrated and radiometrically corrected product, but not resampled. The geometric information is contained in a rational polynomial.
The product includes: the Rational Polynomial Coefficients (RPC); the metadata with gain and bias values for each band, needed to convert the digital numbers into radiances at pixel level, and information about geographic projection (EPGS), corners geolocation, etc.
A calibrated and radiometrically corrected product, manually orthorectified and resampled to a map grid. The geometric information is contained in the GeoTIFF tags. By default, the reference base for orthorectification is Google Earth. Other user-provided bases can be used on demand. Typical geometric error of this product (RMSE) is < 20 m.
JPEG-2000 format is also available on demand for all processing levels.
Table 2 summarizes DEIMOS-2 products and characteristics. Note that Spatial Resolution refers to resolution at Nadir, and it depends on observation angle.
|Processing Level and Spatial Resolution|
|Product Type||L1B (native)||L1C (ortho)||Spectral Bands|
|Pan-sarpened||1.0 m||75 cm||All||R,G,B||NIR,R,G|
|Pan||1.0 m||75 cm||Only Pan Band|
|MS||4.0 m||3.0 m||Only MS Bands|
|Bundle (Pan+MS)||1.0 m (P), 4.0 m (MS)||75 cm (P), 3.0 m (MS)||All|
Table 2: DEIMOS-2 Products Characteristics vs. Processing Level
Table 3: Example of DEIMOS-2 Products
DEIMOS-2 products are provided in DIMAP format. It consist of two parts, one for the image and the other for a description of the image (Metadata). The image products for DEIMOS-2 are provided by default in GeoTIFF. Other formats are also available such as jpg, dim, html and tif.
Deimos Imaging offers a wide variety of delivery methods for DEIMOS-2 products, which can be adapted to Customer’s requirements.Usually, products are delivered via FTP Pull, being placed in an FTP hosted by Deimos Imaging. On Customer’s request, data can be delivered via FTP Push (i.e. on an FTP set up by the Customer), or via a physical mean sent by courier (USB stick, hard disk or DVD).
24/7 end-to-end service
Rush tasking orders for DEIMOS-2 images are accepted in support of emergency events, global security, maritime surveillance and various other applications in which fast delivery of satellite data is crucial. We can provide image data within a few hours after the rush activation and deliver them via FTP.
|Bands||Spectral Range (nm)||Spatial Resolution (m)|
|Green||520 – 600||22|
|Red||630 – 690||22|
|NIR||770 – 900||22|
Table 1: DEIMOS-1 Sensor’s Features
Its three spectral bands (R, G, NIR) are similar to those of Landsat missions, ensuring continuity with existing tools and harmonization with historical data. A synthetic blue band can also be generated to produce natural-color imagery.
|Radiometric Resolution||8 or 10 bits|
|Revisit time||3-day worldwide|
|System Capacity||5,000,000 km/2 daily|
Table 2: DEIMOS-1 Characteristics
DEIMOS-1 products are available at different processing levels:
|L1R||Basic Geopositioned product|
|L1T||L1R data Orthorectified to sub-pixel accuracy (10 meters RMS error)|
Table 3: DEIMOS-1 Products
The L1T products are delivered using UTM/WGS84 projection by default. Alternatively, it is possible to orthorectify DEIMOS-1 images to any projection using reference imagery and DEM datasets supplied by the customer.
|L1R||L1T (R-G-NIR)||L1T (R-G-B)|
Table 4: Example of DEIMOS-1 data
DEIMOS-1 products are provided in DIMAP format. It consist of two parts, one for the image and the other for a description of the image (Metadata). The image products for DEIMOS-1 are provided by default in GeoTIFF. Other formats are also available such as jpg, dim, html and tif.
Deimos Imaging offers a wide variety of delivery methods for DEIMOS-1 products, which can be adapted to Customer’s requirements.Usually, products are delivered via FTP Pull, being placed in an FTP hosted by Deimos Imaging. On Customer’s request, data can be delivered via FTP Push (i.e. on an FTP set up by the Customer), or via a physical mean sent by courier (USB stick, hard disk or DVD).
24/7 end-to-end service
Rush tasking orders for DEIMOS-1 images are accepted in support of emergency events, global security, maritime surveillance and various other applications in which fast delivery of satellite data is crucial. We can provide image data within a few hours after the rush activation and deliver them via FTP.