Minimize AVNIR-2 Products and Algorithms
Minimize Products Information

ALOS products follow the standard CEOS format convention. The detailed product format specifications have been defined and are maintained by JAXA and are available here.

Products provided by ADEN are generated using the JAXA processor, integrated in the ADEN ground segment. Therefore, product format and auxiliary information provided in the product (product coordinates, calibration parameters, etc.) are those defined by JAXA.







Uncompressed, reconstructed digital counts appended with radiometric calibration coefficients and geometric correction coefficients (appended but not applied)


Separate image files for each band


Radiometrically calibrated data at sensor input


Separate image files for each band


The following correction options are available: R: Geo-reference data; G: Geo-corded data; D: Rough DEM (Digital Elevation Model) correction: this option corrects the topographical influence to the areas where DEM was covered. DEM correction is effective only in Japanese region. There is a possibility that DEM correction error will occur when pointing angle is large. In this case, accuracy is not guaranteed because interpolation is carried out in the error area. If specifying this option outside the Japanese region, D option becomes effective, however, DEM applied product is not generated. That is; the product, which is defined as altitude = 0m, will be generated.



Polar Stereographic


Nearest Neighbour

Cubic Convolution


Separate image

files for each band

NB : Level 0 is not available for use

  • AVNIR-2 Product Characteristics
  • Level 1A is not calibrated.
  • A summary file (ASCII file) is provided with all data processed. This ASCII file embeds basic information on product metadata.
  • Pixel spacing, to be applied for transformation from level 1B1 to level 1B2, is strongly dependent on the pointing angle of the AVNIR-2 instrument when observing the area of interest. This parameter is fixed by the processor based on the following pointing angles:

Pointing angle

0 to 31.6 degrees

angle 31.6 to 40.3 degrees

More than 40.3 degrees

Pixel spacing (m)




  • Radiometric rescaling gain and offset values for each band are expressed in W/m2str­m and can be retrieved from products processed into CEOS format. These values are stored in the scene header record. It should be noted that the processing chain applies a pre-flight calibration and the coefficients have been determined before launch. No in-flight calibration was applied.
  • Solar spectral irradiance values are not provided with the products processed into CEOS format. They can be computed using the following values (Thuillier 2003):


Band 1

Band 2

Band 3

Band 4






Solar spectral






  • For the projection parameter, users can choose between UTM or Polar Stereographic. The projection parameters are fixed by the processor. The Polar stereographic parameter corresponds to the latitude/longitude of the scene centre.
  • Rational  Polynomial Coefficients (RPC) are not provided with the product format. If users want to apply map projection; to transform geo referenced product to geo coded product, they  need to use the polynomial coefficients provided with the CEOS format.
  • Product Availability
  • To search and browse the available AVNIR-2 products in the ADEN archives, please refer to ESA's multi-mission catalogue.
    Searching is possible without registration; ordering is only possible for registered users.