| Import Deimos Products |
|
This command allows to import the data of Deimos 1 products in DIMAP format. The payload is a three-band multispectral imager system with 22m Ground Sample Distance (GSD) at nominal altitude (663 km) with 625 km swath, 8 or 10 bits radiometric depth available. Imager delivers data in three spectral bands, very close to the Near-Infrared (NIR), Red (R) and Green (G) bands in the Landsat series of US satellites. The satellite payload is a dual bank linear CCD push broom imager, so that banks are mounted at an angle to provide a wide imaging swath, one of the most characteristics DEIMOS-1 features.
For more details please see: DEIMOS-1 Product Guide
The spectral bandwidth and profiles of DEIMOS-1 imager, equivalent to those of Landsat ETM+ instrument, are outlined in the next table.
| SLIM-6 Sensor characteristics | ||
|---|---|---|
| Bands | Spectral Range (μm) | Spatial Resolution (m) |
| Green | 0.52 – 0.60 | 22 |
| Red | 0.63 – 0.69 | 22 |
| Near Infra-Red | 0.77 – 0.90 | 22 |
Images data products are delivered in the TIFF and GeoTIFF image formats by default, as shown in the table
| File extension | Description |
|---|---|
| dim | DIMAP file contains all information about the image, such as date and time of the acquisition, geolocation information, etc. The L1R product level tie-point used as the model transformation approach to provide a geographic image extension. |
| htm | HTML file easy to read using a web browser and contains most of the information stored in the DIMAP. |
| jpg | It is an image of small size, which provides a quick overview of the product shown in htm file. |
| sip | The SIP is the primary file metadata file of the image. It contains all the information stored in the DIMAP and a rigorous adjustment model coefficients for the image. SIP is a proprietary format developed by Spacemetric AB, SE. |
| tif | The data of the actual product. |
| tfw | ESRI Worldfile. Not included in L1R products. |
The metadata for image products are contained within the DIMAP (.dim) files. DMI DIMAP is based upon the DIMAP generic profile version 1.1 developed by SpotImage and CNES, and is implemented through the use of XML. A detail description is provided in DEIMOS-1 Product Guide.
Some elements of the DIMAP are not clearly defined and open for data providers to define their own parameters. For such elements used in the DMC DIMAP, a description of these elements and examples will be given in this section.
Documentation on DIMAP version 1.1 and the DIMAP XML implementation can be found at the following URL: http://www.spotimage.fr/dimap/spec/documentation/refdoc.htm. The DIMAP elements and their implementation are described in documents RD#02 and RD#03, which can be found at the following URL: http://www.spotimage.fr/dimap/spec/dictionary/dictionary.htm
Image files are provided with a standard file naming convention explained below by means of an example.
Example: DE01_SL6_22P_1T_20110616T092316_20110616T092427_DMI_0_2e9d
Convention meaning: