Output Format
Note
It is recommended to output the “improPhed” Level 2 data to the Level 2 directory, i.e. DIR_LOWER = DIR_HIGHER.
This way, the refined dataset is appended to the original dataset as a separate product.
Thus, after running this submodule, two surface reflectance versions are available for each date.
The new product will have higher spatial resolution (more pixels) than the other products (e.g. QAI).
higher-level can digest this data structure, and the user can choose to use the original BOA or the refined product (USE_L2_IMPROPHE).
Data organization
The data are organized in a gridded data structure, i.e. data cubes. The tiles manifest as directories in the file system, and the images are stored within.
See also
Check out this tutorial, which explains what a datacube is, how it is parameterized, how you can find a POI, how to visualize the tiling grid, and how to conveniently display cubed data.
Data Cube definition
The spatial data cube definition is appended to each data cube, i.e. to each directory containing tiled datasets, see Data Cube definition.
File format
Refer to Output format for details on the file format and metadata.
Naming convention
Following 29-digit naming convention is applied to all output files:
Example filename: 20160823_LEVEL2_SEN2A_IMP.tif
Digits |
Description |
|
|---|---|---|
1–8 |
Acquisition date as YYYYMMDD |
|
10–15 |
Product Level |
|
17–21 |
Sensor ID |
|
LND04 |
Landsat 4 Thematic Mapper |
|
LND05 |
Landsat 5 Thematic Mapper |
|
LND07 |
Landsat 7 Enhanced Thematic Mapper |
|
LND08 |
Landsat 8 Operational Land Imager |
|
23–25 |
Product Type |
|
IMP |
ImproPhed Bottom-of-Atmosphere Reflectance |
|
27–29 |
File extension |
|
tif |
image data in compressed GeoTiff format |
|
dat |
image data in flat binary ENVI format |
|
hdr |
metadata for ENVI format |
|
Product type
Reflectance
There is only one product type, i.e. the ImproPhed Bottom-of-Atmosphere Reflectance (IMP). The IMP product has the same specification as the BOA product (see Output Format), but spatial resolution was enhanced. The scale is 10000, and nodata value is -9999. IMP data contain multiple bands, which represent wavelengths, see metadata and following tables). All bands are provided at the same spatial resolution (see Parameter file).