== Useful links for working with ECMWF's MARS archive and flex_extract ==


== General overview ==


https://software.ecmwf.int/wiki/display/WEBAPI/ECMWF+Web+API+Home [[BR]]
https://software.ecmwf.int/wiki/display/SUP/Home

Follow instructions to register

  https://software.ecmwf.int/wiki/display/WEBAPI/Access+MARS

Available public datasets and accept licence

  https://software.ecmwf.int/wiki/display/WEBAPI/Available+ECMWF+Public+Datasets

Member-state !WebApi access

  http://apps.ecmwf.int/archive-catalogue/

Website to download directly public datasets and monitor !WebApi activity

  http://apps.ecmwf.int/datasets/

General user documentation

  https://software.ecmwf.int/wiki/display/UDOC/User+Documentation

MARS user documentation

  https://software.ecmwf.int/wiki/display/UDOC/MARS+user+documentation
  -> specifically the keywords!!!! [[BR]]
  https://software.ecmwf.int/wiki/display/UDOC/MARS+keywords
  
Libraries:
  https://software.ecmwf.int/wiki/display/SUP/2015/05/11/Building+ECMWF+software+with+gfortran [[BR]]
  http://www.fftw.org [[BR]]
  https://software.ecmwf.int/wiki/display/EMOS/Emoslib [[BR]]
  https://software.ecmwf.int/wiki/display/GRIB [[BR]]
  https://software.ecmwf.int/wiki/display/ECC

=== Information on data sets: ===

Overview: https://www.ecmwf.int/en/forecasts/datasets/archive-datasets

EA5

  https://software.ecmwf.int/wiki/display/CKB/What+is+ERA5 [[BR]]
  https://software.ecmwf.int/wiki/display/CKB/How+to+download+ERA5+data+via+the+ECMWF+Web+API [[BR]]
  https://software.ecmwf.int/wiki/display/CKB/ERA5+data+documentation

CERA-20C
  https://software.ecmwf.int/wiki/display/CKB/What+is+CERA-20C [[BR]]
  https://www.ecmwf.int/en/forecasts/datasets/archive-datasets/reanalysis-datasets/cera-20c

ERA-Interim

  https://www.ecmwf.int/en/forecasts/datasets/archive-datasets/reanalysis-datasets/era-interim

=== Plotting GRIB fields: ===

https://software.ecmwf.int/wiki/display/CKB/How+to+plot+GRIB+files+with+Python+and+matplotlib


=== Installation hints: ===

  1. Read Emoslib installation instructions
  2. Read ECMWF blog about gfortran
  3. Install `fftw` 
  4. Install `emoslib` (2 times make! one without any options and one with single precision option)
  5. Install `eccodes` (or `gib_api`)
  6. Register for MARS access
  7. Install !WebApi
  8. Make sure that `LD_LIBRARY_PATH` environment variable contains paths to all the libs
  9. Check availability of python packages required (e.g. `import eccodes` / `import grib_api` / `import ecmwfapi`) and install them if not present
  10. Start test retrieval
  11. Install flex_extract

Notes:
  - use the same compiler and compiler (major) version all the time
  - adapt makefile