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Processing Services

This section of the user manual aims to describe the processing services available in the ESA Charter Mapper. Each of the services are described one by one with the provision of all essential information for their correct usage and related examples. This introduction aims to provide all the necessary information required to better understand product specifications and tutorials of the multiple services.

List of processing services

In Table 1 is given the list of the EO data pre-processing services currently available in the ESA Charter Mapper. All the services are mapped in the table below with service number, service name and short name. The summary given in Table 1 also includes how these services are employed in the ESA Charter Mapper according to the type of disaster and production mode.

# Service name Short name Flood large Flash flood Tsunami S & H rural S & H urban Earthquake Landslide Wildfire Volcano
1 Optical Products Calibration OPT-Calib S S S S S S S S S
2 Optical Pan sharpened Image Generation PAN-Sharp OD OD OD OD OD OD OD OD OD
3 Radar Products Calibration SAR-Calib S S S S S S S S S
4 Multi-Sensor Band Composite COMBI S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD
5 Advanced Multi-Sensor Band Composite COMBI-Plus S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD
6 Optical Spectral Index Generation OPT-Index S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD
7 Co-registered Stacking Co-Register S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD S and OD
8 Co-located Stacking STACK OD OD OD OD OD OD OD OD OD
10 Coherence and Intensity Composite SAR-COIN OD OD OD OD OD OD
11 SAR Amplitude Change SAR-Change OD OD OD OD OD OD OD OD OD
12 Flood Delineation HASARD OD OD OD OD OD
13 DInSAR Displacement Mapping DInSAR OD OD
15 Hotspot Detection HOTSPOT S and OD OD
17 Burned Areas Severity Analysis BAS OD OD
18 IRIS Change Detection IRIS OD OD OD OD OD OD OD OD OD

Table 1 - Outlook of the ESA Charter Mapper processing services and their application to specific disaster types. 'S' stands for Sytematic and 'OD' for On-Demand production modes

Different types of output products

In the ESA Charter Mapper two main types of Product can be derived from both systematic and on-demand processing services:

  1. Visual Products (Overview images as grayscale or RGB composite).
  2. Physical meaning Products (TOA reflectance, Brightness Temperature, Sigma Nought in dB, interferometric phase and coherence, LOS displacement, indexes, and flood/hotpsot bitmasks).

Each of them is given by following a dedicated data structure (e.g. unit, data type, scale factor, valid range) with respect to the nature of the product, as described in Table 2.

Product Type EO data Description Unit Data type Scale factor Valid Range From service #
Overview Visual OPT, SAR Overview image as RGBA band composite or grayscale product Uint 8 [0, 255] all
Reflectance Physical OPT TOA reflectance for VIS, RE and SWIR CBNs (e.g. blue, nir) Uint 16 0.0001 [0, 10000] 1
Brightness temperature Physical OPT TOA brightness temperature for LWIR CBNs (e.g lwir11) K Uint 16 0.01 1
Spectral index Physical OPT Spectral index (NDVI, NDMIR, NBR, NDWI, NDWI2, MNDWI, NDBI) as normalized difference of CBNs in TOA reflectance Float 32 [-1,1] 6, 17
Sigma nought Physical SAR Sigma nought for L-, C-, X-band SAR data in each polarization (e.g. sigma0-HH-db) dB Float 32 3, 10, 11, 12
Interferometric Coherence Physical SAR Interferometric Coherence from SAR complex imagery (a pair of SLC Datasets). Asset name is: coh_b_pp_YYYYMMDD_YYYYMMDD, where b the SAR-band [x,c,l], pp is the polarization [hh, vv], YYYYMMDD is the date of Reference and Secondary SLC Dataset - Float 32 [0,1] 10, 13
Interferometric Phase Physical SAR Interferometric Phase from SAR complex imagery (a pair of SLC Datasets). Asset name is: phase_b_pp_YYYYMMDD_YYYYMMDD, where b the SAR-band [x,c,l], pp is the polarization [hh, vv], YYYYMMDD is the date of Reference and Secondary SLC Dataset. rad Float 32 [-3.14,3.14] 13
LOS displacement Physical SAR Line of Sight Displacement in centimeters from SAR complex imagery (a pair of SLC Datasets). Asset name is: displacement_b_pp_YYYYMMDD_YYYYMMDD, where b the SAR-band [x,c,l], pp is the polarization [hh, vv], YYYYMMDD is the date of Reference and Secondary SLC Dataset. cm Float 32 13
Hotspot bitmask Physical OPT Hotspot bitmask from hotspot detection based on nir and swir22. (bitmask defined as 0=no-hotspot, 1=hotspot) 1-bit [0,1] 15
Flood bitmask Physical OPT Flood bitmask from the HASARD flood detection service. (bitmask defined as 0=flood, 1=no-flood) 1-bit [0,1] 12
dNBR Physical OPT Difference between the pre and post Normalized Burn Ratio Float 32 17
RBR Physical OPT Relativized Burn Ratio using the pre and post Normalized Burn Ratio Float 32 17
SSI Physical OPT SSI value from change detection assigned to every pixel of the image Float 32 18
Asset from band arithmetic OPT, SAR A single-band asset generated from a co-located/co-registered stack of N-images (reference plus all secondary assets) produced by the co-location /co-registered processors Float 32 7, 8

Table 2 - Description, unit, bit-depth, scaling factor, valid range and originated service for all ESA Charter Mapper product types.

More details about each of the physical meaning or visual products of the ESA Charter Mapper can be found in the specifications of each service.