.. _lower-level:


Lower Level
===========

**Table 1.** Components.

+--------+-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Module | Program                 | Level | Short description                                                                                                                                                                                                           |
+========+=========================+=======+=============================================================================================================================================================================================================================+
| L1AS   | The FORCE :ref:`l1as` is intended to assist in organizing and maintaining a clean and consistent Level 1 data pool, downloading of Sentinel-2 data, and maintaining file queues                                                                               |
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`level1-csd`       | 1     | Download Sentinel-2 data from Google Cloud Storage, and maintenance of Level-1 data pool (also works for Landsat, but only Collection 1 data are available on GCS)                                                          |
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`level1-landsat`   | 1     | Download Landsat Level-1 data and maintenance of the Level-1 data pool                                                                                                                                                      |
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`level1-sentinel2` | 1     | Download of data and maintenance of Level-1 data pool, Sentinel-2 (deprecated, consider using :ref:`level1-csd`)                                                                                                            |
+--------+-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| L2PS   | The FORCE :ref:`l2ps` is intended to generate Analysis Ready Data (ARD), i.e. harmonized, standardized and radiometrically consistent Level 2 products. This includes cloud and cloud shadow detection, radiometric correction and data cubing                | 
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`level2-bulk`      | 2     | Level 2 processing of image archives                                                                                                                                                                                        |
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`level2-core`      | 2     | Level 2 processing of single image                                                                                                                                                                                          |
+--------+-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| WVDB   | The FORCE :ref:`wvdb` component can be used to generate and maintain a water vapor database used for atmospheric correction of Landsat data                                                                                                                   | 
+        +-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|        | :ref:`lut-modis`        | /     | Generation and maintenance of water vapor database using MODIS products                                                                                                                                                     |
+--------+-------------------------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+


**Content:**

.. toctree::
   :hidden:
   :maxdepth: 2

   level1/index.rst
   level2/index.rst
   wvdb/index.rst