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Simplifying Access to MODIS Data Products: A User Perspective

Learn how to select, stage, and receive MODIS data efficiently. Overcome roadblocks for novice and experienced users. Discover the EOS Data Gateway process and top requested improvements.

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Simplifying Access to MODIS Data Products: A User Perspective

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  1. Accessing MODIS Data Products Perspective from MODIS Atmospheres Research Community Bill Ridgway MODAPS Processing Representative for Atmospheric Discipline Science Systems & Applications, Inc. NASA GSFC Code 913 24 July 2002

  2. Archive to Desktop: A Simple Process? • Selection • What product? • What time or location? • Product file “as is” or subset or image? • Staging + [ subsetting, processing, reformatting, etc ] • Delivery • pull, push, tape, etc • Help • software tools, delivery failures, etc.

  3. Conclusions • Selection • EDG & No-Frills tools have perhaps 50% of desired functionality • Search-and-wait interface is not adequate for serious research • Geographic searches include excessive near misses • MODIS product packaging remains a big issue • Staging • Can take 5 minutes or 48 hours • Failures have come down a lot in the past year • Demand on system resources limits orders • Delivery • FTP pulls are most reliable • Product volume is probably the greatest obstacle • Help • Better tools, better examples, better images are still needed

  4. Selection Roadblocks • For the novice: • Navigating the ESDT and collection number maze • Products packaged with too many parameters • Selecting data with the right time and/or location • No useful browse images • For the repeat/experienced user: • Order size limits • EDG has useful functionality, but is torture to use • No Frills GDAAC interface can’t always do what I need • Both are painful for repetitive ordering • Acquiring multiple products should be easy, but isn’t • Geographic searches produce many near misses

  5. EOS Data Gateway: The Carpal Tunnel GUI • EDG Login • Select ESDT(s) and Granule search criteria • Click to Start Search & Wait for search... • Click to Select All • Click to Add to Cart • Click to Accept Data Quality Statement • Click to Accept Quality Assurance Disclaimer • Click Order Options • Click to Select Native Granule FTP Pull • Click to Accept my Choice • Click Go to Step 2 • Click Go to Step 3 • Click Go to Step 4 & Wait for search...

  6. Wish List of Most Requested Changes • Streamline EDG and No Frills for repeat customers • If I already know what I want, please just send it! • MOD021KM.A2002187.1550.003.xxxx • Ditto for MOD03, MOD35_L2, MOD04_L2, etc. • Data pool with FTP interface for machine data acquisition • A geographical search tool that really works • Easy ordering of many products for a single 5-minute granule

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