Center for Earth Observation

...supporting the remote sensing needs of the University


Where can I get MODIS "point" data - NASA AppEEARS

The NASA Application for Extracting and Exploring Analysis Ready Samples (AppEEARS) site allows users to access MODIS and Landsat data for selected point locations without the need to actually download these raster datasets.  You can manually enter one or more point locations or upload a file of sites for analysis.  On the site you can generate charts and graphs of these data individually or in combination, over various tim

Where can I get MODIS time seris data?

The Oak Ridge National Laboratory distributes global subsets of many MODIS land products.  The subsets are spatially limited to a maximum of 200 km X 200 km in size but can cover the entire time of the MODIS program.  This is an easy way to obtain a time series of data for you research projects.

The data are available at the ORNL DAAC at:

Importing MODIS Products with ENVI

ENVI can open and process most MODIS HDF data.  However, the data formats and specific processing steps differ for daily scenes and the various domain products.  Daily scenes have geographic coordinate information embedded in the file.  Instructions for importing these data are covered in another FAQ.  MODIS products are typically distributed using the sinusoidal projection in 10º tiles.  Instructions for processing several types of data are described below. 

What is MODIS?

MODIS is an extensive program using sensors on two satellites that each provide complete daily coverage of the earth.  The data have a variety of resolutions; spectral, spatial and temporal.  Because the MODIS sensor is carried on both the Terra and Aqua satellites, it is generally possible to obtain images in the morning (Terra) and the afternoon (Aqua) for any particular location.  Night time data are also available in the thermal range of the spectrum.  You should consider time of day when ordering a scene for a specific day.

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