Vision-1

Long name	Vision-1
Short name	VIS1
Sensor type	SSTL S1
Platform	Vision-1
Key file name (use to open dataset)	VIS1_*_Meta.xml
Supported file name extensions	.xml, .tif, .jp2, .txt, .jpg
Sections	Data product name and description Distribution disk files Returned data for supported format References

Data product name and description

Vision-1 provides 0.87m resolution imagery in the panchromatic band and 3.48m in the multispectral bands (NIR, RGB), with a 20.8km swath width.

As the Panchromatic and Multispectral data are simultaneously acquired, imagery can be provided as single products or as a bundle delivered together in a single, non-merged product. Pansharpened products combine the visual coloured information of the multispectral data with the details provided in the panchromatic data, resulting in a single higher resolution colour product.

The following Vision-1 data products are supported by GDB:

Primary/Sensor

The Primary product contains the geometric processing level closest to the natural image acquired by the sensor. Data is acquired in the S-N direction, sensor geometry for Vision-1 means that, if not displayed correctly using rpc or tiff world file, the image can appear as if it is flipped in the along-track direction.

Projected

The projected product is created by the application of an additional mapping process to project the image onto an Earth cartographic system at a fixed altitude. The projected product is mapped onto the Earth using a standard reference datum and projection system at a constant terrestrial altitude, relative to the reference ellipsoid.

Standard Orthorectified

Georeferenced image in Earth geometry, including the application of a DEM and GCPs. It is created via a fully automated procedure. The Standard Ortho product is created using our accurate sensor model. Height information is provided via the Airbus World DEM for Ortho (WD4O) DEM; and precision is improved via GCPs applied using the Airbus Intelligence One Atlas BaseMap as reference.

Tailored Orthorectified

It is custom orthorectification, using projection, height and/or reference information provided by the client as required. Each Tailored Ortho product is subject to a feasibility study and specific delivery timeframes.

Note: The information provided herein is based on the data distributor's documentation cited under References.

Spectral bands: Spectral range (nm)	Spatial resolution (m)* (spectral resolution)	Maximum image dimensions (Across track x along track, km)	Notes
Blue: 440 - 510 Green: 510 - 590 Red: 600 - 670 NIR: 780 - 910 Panchromatic: 450 - 650	MS – GSD At-Nadir: 3.48 m PAN – GSD At-Nadir: 0.87 m	Image swath at nadir: 20.8	Sensor Dynamic Range: 10 bits per pixel Imagery Data Type: 16-bit Unsigned Integer Viewing angle: Standard:+/- 20 Extended: +/-45 Period/Inclination: 96.2 minutes/97.5 Detectors: 4 x CCD array assembly cross track

Spectrally available image products are as follows:

Product type	Description	Notes
Bundle (BUN)	4-band multispectral and panchromatic data from same acquisition in a single product package.	Data is provided in either GeoTIFF or Jpeg200 format, with pixel sizes of 3.48m and 0.87m for MS and PAN data respectively.
Pansharpened (PMS)	Pansharpened products combine lower resolution multispectral bands with the high-resolution panchromatic data resulting in a single 0.87m colour product.	Include 4-band 16-bit Pansharpened (PMS4) and 3-band 8-bit natural colour Pansharpened with DISPLAY radiometry (PMS3).
Multispectral only (MS4)	The single multispectral product includes four multispectral (colour) bands.	They are : Blue, Green, Red and Near Infrared. The product pixel size is 3.48m
Panchromatic only (PAN)	Data contained within a single high resolution black and white band.	It covers wavelengths between 450 and 650nm within the visible spectrum. The product pixel size is 0.87m.

Distribution disk files

Warning: Data sets for this sensor are organized in a specific folder structure on disk. GDB uses this structure and the file names to identify the data product type. Do not alter the folder structure or any file names prior to data ingestion to ensure the image data and auxiliary information are imported correctly.

You can open a Vision-1 data set by selecting the VIS1_*_Meta.xml file.

When opening a Vision-1 dataset, the files read by GDB are described in the following table.

File name	Format	Required	Contents/details
VIS1_*_Meta.xml	XML	Yes	Key file name, contains data set metadata
VIS1_.jp2 VIS1_.tif VIS1__RC.jp2 VIS1__RC.tif	GeoTIFF or JP2	Yes	Image data
VIS1_.rpc*	RPC data	Yes	Text file of Rational Polynomial Coefficients (Only availiable for primary products)
VIS1__Preview.jpg*	JPG	Optional	Browse file

Returned data for supported format

Vision-1 data can be opened directly in its raw vendor format or imported into a PCIDSK (*.pix) file using the key file name (*_Meta.xml). For optimal processing, use the PCIDSK format.

The following table describes the data structure after it is opened by GDB.

Data product	Data returned	Details/notes
Multi Spectral	4 x [16U] raster channels 1 x [TEX] product annotation 1 x [ORB] orbit segment 1 x [BIN] rational function model	4-band MS Image (Blue, Green, Red and NIR) ORB and BIN only available for non-ortho products
Panchromatic	1 x [16U] raster channel 1 x [TEX] product annotation 1 x [ORB] orbit segment 1 x [BIN] rational function model	1-band Panchromatic Image ORB and BIN only available for non-ortho product
Pansharpened	3 (or 4) x [16U] raster channel 1 x [TEX] product annotation 1 x [ORB] orbit segment 1 x [BIN] rational function model	3-band Image (Blue, Green, Red) or 4-band Image (Blue, Green, Red and NIR) ORB and BIN only available for non-ortho product

References

Airbus Vision-1 Imagery user guide_ISSUE_V2.0.pdf June 2023 (v2.0)

Vision-1_QuickInfo_v2.1.pdf May 2023 (v2.1)

For more information, visit: https://earth.esa.int/eogateway/missions/vision-1