Recipe: Retrieve data subsets using download tool: Difference between revisions

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Back to [[G5NR Data Access Guide]].
== Problem ==
== Problem ==
We want to download data subsets using the download tool.


== Solution ==
== Solution ==


==== Download global data ====
The download tool can be used for '''server-side subsetting''' of collections. This can be done either via the tool's web interface or the command line.
 
==== Web interface ====
 
The base url for the download tool for G5NR data is
https://portal.nccs.nasa.gov/cgi-lats4d/opendap.cgi?&path=/OSSE/G5NR/Ganymed/7km
 
To download a subset of the collection inst01hr_3d_T_Cv, from the above url, one can follow links [0.5000_deg → inst → Download (for the appropriate collection)] to the collection's download page at
 
https://portal.nccs.nasa.gov/cgi-lats4d/webform.cgi?&i=OSSE/G5NR/Ganymed/7km/0.5000_deg/inst/inst01hr_3d_T_Cv.


The download tool can be used for server-side subsetting of collections. This can be done either via the tool's web interface or the command line.
Here one can select
* variables
* begin/end times
* vertical levels (for 3D data)
* spatial subset (by drawing a box or specifying the lats/lons)


* Web interface - The base url for the download tool for G5NR data is
and download the resulting data in a format of choice (compressed NetCDF-4, little endian binary etc.).
http://portal.nccs.nasa.gov/cgi-lats4d/opendap.cgi?&path=/OSSE/GEOS-5.12.
To download a subset of the collection inst01hr_3d_T_Cv, from the above url, one can follow links [0.5000_deg → inst → Download (for the appropriate collection)] to the collection's download page at http://portal.nccs.nasa.gov/cgi-lats4d/webform.cgi?&i=OSSE/GEOS-5.12/0.5000_deg/inst01hr_3d_T_Cv. Here one can select variables, the begin and end times, vertical levels (for 3D data), spatial subset (by drawing a box or specifying the lats/lons) and download the resulting data in a format of choice (compressed NetCDF-4, little endian binary etc.).


==== Command line interface ====
<!--
* Command line/Python script - There has to be a way to construct the POST request and then potentially use the Python requests module???
* Command line/Python script - There has to be a way to construct the POST request and then potentially use the Python requests module???
-->


== See Also ==


==== Download data subset ====
# File Spec: [[File:G5NR-Ganymed-7km FileSpec-ON6-V1.0.pdf]]

Latest revision as of 10:23, 9 April 2019

Back to G5NR Data Access Guide.

Problem

We want to download data subsets using the download tool.

Solution

The download tool can be used for server-side subsetting of collections. This can be done either via the tool's web interface or the command line.

Web interface

The base url for the download tool for G5NR data is 

https://portal.nccs.nasa.gov/cgi-lats4d/opendap.cgi?&path=/OSSE/G5NR/Ganymed/7km

To download a subset of the collection inst01hr_3d_T_Cv, from the above url, one can follow links [0.5000_deg → inst → Download (for the appropriate collection)] to the collection's download page at 

https://portal.nccs.nasa.gov/cgi-lats4d/webform.cgi?&i=OSSE/G5NR/Ganymed/7km/0.5000_deg/inst/inst01hr_3d_T_Cv.

Here one can select

  • variables
  • begin/end times
  • vertical levels (for 3D data)
  • spatial subset (by drawing a box or specifying the lats/lons)

and download the resulting data in a format of choice (compressed NetCDF-4, little endian binary etc.).

Command line interface

See Also

  1. File Spec: File:G5NR-Ganymed-7km FileSpec-ON6-V1.0.pdf
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