AMAPS Services

AMAPS provides a suite of data query/access services that enable one to access aerosol data from MISR and MODIS, subset Level-2 MISR granules by parameter and by space/time region, and extract MISR aerosol data for overflights of specific geographic regions or of ground sites like the AERONET or AIRNow networks.

Users of the services access AMAPS via webpages that prompt the user to fill in necessary arguments (e.g. space-time bounding boxes), and then execute the service workflow by pushing a button. The execution web page is simply a 'graphical display' version (flowchart) of the underlying workflow (SciFlo XML) document. The user can monitor the processing steps in the workflow as they execute, and then retrieve results when the services complete.

The list below shows the currently available workflows. Please be sure to review the notes that go with each workflow for more details about how to use it. Several of the workflows are "throttled" so that they will reject requests which are too large in scope. For example, one cannot use the MISR Subsetter to request data for an entire year at one time, but month-long requests for regions are certainly possible.

New users can get a detailed walk-through of a typical workflow (MisrSubsetter).

Feel free to try out each workflow with the default inputs (a small request) to see what they produce.

Workflows:

• Get MISR URLs: Get a list of MISR Level-2 Aerosol granules (downloadable links) that intersect a space-time bounding box (GetMisrUrls notes).

• Get MODIS Aerosol URLs: Get a list of MODIS Level-2 Aerosol granules (downloadable links) that intersect a space-time bounding box (getModisAerosolUrls notes).

• Get MODIS Cloud URLs: Get a list of MODIS Level-2 Cloud granules (downloadable links) that intersect a space-time bounding box (getModisCloudUrls notes).

• MISR Subsetter: Get a list MISR Level-2 Aerosol granules that intersect a space-time bounding box, and then for each granule download a subset of the parameters (variable arrays) reformatted into an easily-readable netCDF file. (MisrSubsetter notes).

• Matchup Sites To MISR: Find MISR overflights of ground sites (e.g. AERONET or AIRNow) that are within a space-time bounding box, and then extract MISR aerosol optical depth (AOD) data from each (exact) overflight and return it as lines of text (MatchupSitesToMisr notes).

• Matchup Sites To MISR #2: Same as the previous workflow, but the list of site locations can be pasted in as text lines, rather than uploaded as a text file via a URL (MatchupSitesToMisr2 notes).