下载modis数据的方法.

1、How to Download MODIS Images Dr. A.K.M. Saiful Islam, IWFM, BUET Dr. Sujit Kumar Bala, IWFM, BUET Mr. M. Golam Mahboob, BARI December 2007 MODIS Web site / Discipline We are mostly interested in Land and Atmospheric data MODIS Vegetation Indices http:/modis-land.gsfc.nasa.go

2、v/vi.htm MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid V005 EDG Data Set NameShortName MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid V005 MOD13Q1 Versi on Acquisition Range Science Quality Status 003 August 29, 2002 October 7, 2002 Provisional from 11/01/2000 004 Febr

3、uary 24, 2000 December 31, 2006 Validated Stage 1 from 04/06/2000 005February 24, 2000 - Validated Stage 2 from 02/18/2000 MODIS NDVI and EVI Data Characteristics Area: 10 degrees x 10 degrees lat/long Dimensions: 4800 x 4800 rows/columns File Size: 5 - 270 MB Resolution: 250 meters Projection: Sinu

4、soidal Data Format: HDF-EOS Science Data Sets (SDS HDF Layers): 12 Product Description Global MODIS vegetation indices are designed to provide consistent spatial and temporal comparisons of vegetation conditions. Blue, red, and near-infrared reflectances, centered at 469-nanometers, 645- nanometers,

5、 and 858-nanometers, respectively, are used to determine the MODIS daily vegetation indices. The MODIS NDVI and EVI products are computed from atmospherically corrected bi-directional surface reflectances that have been masked for water, clouds, heavy aerosols, and cloud shadows. Version-5 MODIS/Ter

6、ra Vegetation Indices products are Validated Stage 2, meaning that accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Although there may be later improved versions, these data are ready for use in scientific publica

7、tions. Download Retrieve the MOD13Q1.5 MODIS product through the LP DAAC Data Pool Via Search Tool: :22000/WebAccess/drill?attri b=esdt&esdt=MOD13Q1.5&group=MOLT Via FTP Directory: /MOLT/MOD13Q1.005/ Order Data through the EOS Data Gateway (http:/

8、/pub/imswelcome/) 1.EOS Data Gateway Search Tips Data Center:LPDAACSensor:MODISDataset:MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid V005Spatial:HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/MinGeographic Extent:Type Lat/Long Range or Draw on MapTemporal Ex

9、tent:2000-02-18 to present Order Data through the EOS Data Gateway Please register and create your own account /pub/imswelcome/ Enter as Registered User After registration Enter the site as registered user Primary Data Search Tool By Discipline Choose Data set 16-day globa

10、l 250m Sin grid V005 Spatial Coverage For Bangladesh entire Dhaka coordinates Temporal coverage Select Date and time Annually Repeating Time Period Julian data January to March (001 to 090) From 2000 to 2007 Additional Search Options Thermal data : you may select day or night You can change from def

11、ault 100 to desire no of data granular Each year 6 (16 day) x 8 years (2000-2007) = 48 data version 005 Start search First Save Your search and save as file You can also restore search Finally start search Search in progress Will show partial results List result data set Click on List data granules

12、Click on Box Listing Data Granular Select All data and items selected in all pages Show Map coverage Zoom Spatial coverage North part of Bangladesh is in another spatial coverage Add selection to Cart Choose order option Choose order option Select FtpPull Every data granule Click on OK! Order as FTP Pull Go to Step 2: Order form Review order form At the end of the order form Please click on Go to Step 3: Review order summary Before submitting order OR, you can directly Sub