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@@ -49,7 +51,7 @@ After referring to related documents, this section continues with some InSAR-spe
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# EGMS PRODUCT OVERVIEW
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# EGMS Product Overview
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The European Ground Motion Service provides three main InSAR products for visualisation, analysis and download by users of the service's dissemination platform.
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# PROJECTION AND DATUM
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# Projection and Datum
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*Basic* and *Calibrated* products are **point** databases (i.e., 'vector data' in GIS jargon). As such, the choice of projection and datum does not affect the product quality - they can be reprojected on-the-fly without any geometric distortion. Modern GIS platforms can make such reprojections rapidly, so the choice of projection for storage and delivery of these products is not critical. However, a uniform projection is used for EGMS products using the European Grid (ETRS89-LAEA), a standard based upon the ETRS89 Lambert Azimuthal Equal-Area projection coordinate reference system, with the centre of the projection at the point 52° N, 10° E. In addition, non-projected (geographic) coordinates using the WGS84 datum are annotated for each measurement point in *Basic* and *Calibrated* products.
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EGMS *Ortho* products (which are in raster format) are based upon a 100 m grid, where each cell is dependent on the chosen projection and datum. When such data are reprojected, they must be resampled, and thus are susceptible to geometric distortions.
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# EGMS PRODUCT SPECIFICATIONS
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# EGMS Product Specifications
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This section details the specifications for each of the three EGMS products. Note, for *Basic* and *Calibrated* products, the specifications are common to both ascending and descending geometries. This does not apply to *Ortho* products that are made from the decomposition of both geometries.
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# EGMS PRODUCT ATTRIBUTES
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# EGMS Product Attributes
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This section details the data-fields (attributes) that are provided with each of the EGMS products. Note, for *Basic* and *Calibrated* products, the attributes are common to both ascending and descending geometries. This does not apply to *Ortho* products that are made from the decomposition of both geometries
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# EGMS PRODUCT FORMAT
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# EGMS Product Format
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This section details the standard format of EGMS products. Note, for *Basic* and *Calibrated* products, the formats are common to both ascending and descending geometries. This does not apply to *Ortho* products that are made from the decomposition of both geometries.
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```
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:::
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*Table 10 Example of XML header file*
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: Table 10 Example of XML header file
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## Convention for Burst Data Files Names
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assert uid_egms == "088-0282-IW2-VV"
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```
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*Table 11 Unique burst cycle ID for Sentinel-1*
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; Table 11 Unique burst cycle ID for Sentinel-1
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EGMS is a one-delivery-per-year project, and, for each delivery, data is contained in a pre-defined temporal range.
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assert uid_decoded["PIXEL"] == pixel
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```
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*Table 12 Unique MP\'s code over the entire Europe for Basic and Calibrated products.*
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: Table 12 Unique MP\'s code over the entire Europe for Basic and Calibrated products.
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Each Ortho product measurement point's code follows a precise convention, outlined by the formula in Table 13.
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@@ -1440,7 +1442,7 @@ EstimatedSTD_Acc = sqrt(invG(1,1))*EstimatedSTD_Noise; %%% in [mm/yr]
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