Example: Access GPM IMERG Data Using Giovanni
Giovanni is a web-based application that allows for easy and quick exploration of many NASA data products
(
http://giovanni.gsfc.nasa.gov/giovanni/)
On the Giovanni page you will see the following options:
Select Plot: Allows selection of analysis options
Select Date Range: Allows selection of time period
Select Region (Bounding Box or Shapefile): Allows section of a geographic region
(By latitude-longitude, by map, or by shapefiles)
Keyword: Search data parameter by keyword
Plot data (bottom right): Make desired plot
Learn to select, analyze, visualize, and download IMERG data for a country or a river basin using Giovanni
Learn to generate -- map and time series of rain rates for a selected country or river basin
Time-averaged Rain Map
Go to (
http://giovanni.gsfc.nasa.gov/giovanni/)
Enter the following options
Keyword: Enter IMERG
Select Merged satellite-gauge precipitation estimate - Final Run (recommended for general use) (GPM_3IMERGM v03) Monthly
Select Plot: Maps: Time Averaged Map
Select Date Range: Month or Season and YYYY Range
Click the calendar icon and select ‘Seasons’, then select
Select 2015 June as the start date
Select 2015 August as the end year
Select Region (Bounding Box or Shapefile): Click on ‘Show Map’ to see the region
Example : Rain Rate Map for Mekong Basin (Select the following options)
Then Click on
‘Plot Data’ (at the bottom right)
You will get a map of rain rate averaged over June to August 2015
You can click the upper left ‘+’ symbol to zoom in.
Click on
‘Download’ and save the image as png, kmz (to view in Google Earth)
