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Primary processing materials
from the Resurs-P spacecraft

Specifics of primary processing
Resurs-P satellite images in IMC

Resurs-P

"Resurs-P No. 1 was launched on June 25, 2013 from Baikonur Cosmodrome, and was put into normal operation on September 30, 2013. "Resurs-P No. 2 was launched on December 26, 2014 from Baikonur Cosmodrome. Resurs-P No. 3 was launched on May 13, 2016 from Baikonur Cosmodrome.Head developer: RSC Progress. Operator: NTs OMZ JSC Russian Space Systems.

The spacecraft has the capabilities of object and route surveys. It is possible stereo survey of routes up to 115 km in size; survey of sites up to 100x300 km.

"Resurs-P is designed to update maps, to support the economic activities of the Ministry of Natural Resources of Russia, Ministry of Emergency Situations of Russia, Rosselkhoz, Rosrybolovstvo, Rosgidromet and other consumers, as well as to obtain information in the field of environmental control and protection.

Stages of processing materials of Resurs-P type satellites

The IMAGE MEDIA CENTER program complex allows to perform primary processing of the data from Resurs-P satellites №1,2,3 of Geoton and KSHMSA-BP equipment. processing technology processing technology is fully automated and includes the following stages:

Processing stage Processing result
1. Refinement of route georeferencing by reference points (mode: manual/not mandatory). Georeferencing error in degrees
2. Obtaining terrain relief on the route for correction of survey geometry (GMTED 2010, 250 m). Terrain in IMG format
3. RPC-transformation on separate channels taking into account terrain and georeferencing error defined at step 1. Transformed channels in IMG format
4. Binding of spectral channels to panchromatic channel to remove the bias between channels. Assembling a composite image from the spectral channels. File in IMG format
5. Increasing the detail of the panchromatic image. Increase of detail by 10-12%
6. Obtaining a complexed image in natural colors with panchromatic image resolution. File in IMG format
7. Elimination of noise in the image. Before processing signal/noise ratio=10 dB After processing signal/noise=13 dB.
8. Checking the accuracy of georeferencing and resolution of the obtained materials. Accuracy of georeferencing about 10 m (with OT)

Input data

Input data are materials of processing level 1A (images on separate channels, without radiometric correction, without orthotransformation, not color-synthesized, with coefficients of RPC-polynomials in XML format).

1A processing level input data. Left - stitched compensation areas in spectral channels (Blue (0.45-0.52 μm), Green (0.52-0.60 μm), Red (0.61-0.68 μm), Near-IR-1 (0.72-0.80 μm), Near-IR-2 (0.80-0, 90 μm)), in the middle are the stitched compensation zones in the panchromatic channel (0.58-0.80 μm), Last are the coefficients of the RPC polynomials in XML format to each channel.

Radiometric correction

The result of radiometric correction. On the left - before radiometric correction; on the right - result of radiometric correction.

At this stage radiometric correction of input data, elimination of defects caused by peculiarities of imaging equipment (uneven sensitivity of elements) is performed.

Orthotransformation

At this stage orthotransformation of images is performed taking into account RPC-coefficients and digital elevation model to the projection specified by the operator.

Result of orthotransformation. On the left - before orthorectification, on the right - after orthorectification.

Channel meshing

Example of channel matching. On the left - offset of the red channel relative to the panchromatic channel. In the middle - offset of the green channel relative to the panchromatic channel. On the right - the result of processing

Binding of spectral channels to panchromatic channel to eliminate the offset between channels. Composite image assembly from spectral channels.

Output data

Output data are the following materials:

  • Processing level 2A product (panchromatic image with radiometric and geometric correction, ortho-transformed into map projection at mean altitude according to on-board automatic navigation system with planned accuracy (RMS) of 30-50 m, with RPC-polynomials coefficients);
  • Processing level 2A1 product (color-synthesized image from 3 channels (RGB) with radiometric and geometric correction, orthotransformed into map projection at mean height according to data of onboard automatic navigation system with planned accuracy (RMS) 30-50 m, with RPC-polynomials coefficients);
  • Processing level 4A product (complexed image of panchromatic (processing level 2A) and multispectral (processing level 2A1) images (Pansharpening);
  • Passport to each output image in XML format;
  • A frame for the survey route in SHP format.

If reference data and DEM are available, output data are products of processing levels 2B, 2B1, 4B (images orthotransformed using reference data and DEM, planned accuracy of which depends on accuracy of reference information).

The image shows the output data from Resurs-P. On the left is a panchromatic image (processing level 2A, 2B), the second image is a multispectral image (processing level 2A1, 2B1) standard processing, the third image is a complex image (processing level 4A, 4B) additional processing.
View User Manual on primary
data processing from the Resource-P spacecraft