APS : Atmospheric Phase Screen
===============================

Product Description
-------------------
The product shows the APS computed from a Global Atmospheric Model. The name of the atmospheric model is given in the metadata:

- ``atmo`` (atmopheric correction used)
- ``ECMWF_model`` (atmopheric model used)

The geotiff file  has 2 bands:

+ **band 1** is the atmospheric phase delay of the interferogram (in rad), positive away from satellite
+ **band 2** is a shaded view of the topography (simulated SAR amplitude image from the DEM)

The png file has 1 band:

+ **band 1** is the atmospheric phase delay of the interferogram, normalized by a color palette.


Available products
-------------------

the Interferogram Atmospheric Phase Screen  is distributed in :

- runw = 8 (resolution of unwrapped interferogram )

The Interferogram Atmospheric Phase Screen  are available in two geometries:

.. toctree::
   :maxdepth: 3
   
   APS_radar
   APS_geo