[Help Page] Home takes the user back to the home page of this site. QuickSearch allows user to search document database.

Finding a Document

The EDHS contains a collection of documents related to the EOSDIS Core System (ECS) project, part of NASA's Earth Science Enterprise program. This collection includes Contract Data Requirements List Items (CDRLs), White Papers, Technical Papers, and other ECS-generated documents. The collection is broken into many catalogs, as well as, a collection of milestone review and workshop presentations.

The easiest way to find a document is to use the QuickSearch function. All documents have associated metadata and an abstract that are indexed into a WAIS (Wide Area Information Server) database. The QuickSearch page contains complete details on how to perform a search. Below is an example of the metadata information that is indexed.

* If you are unable to reach this person, you may contact the EDHS Administrator (Landover_EDHSadmin@raytheon.com) and an attempt will be made to locate another contact.

Users may also want to view the Latest Postings page. This page contains a list of documents that have been posted in (approximately) the past 30 days. The list is in chronological order with the most recent posting(s) at the top of the list. All documents on this page are also maintained in other document catalogs.

The Document Catalogs contain all of the documents posted on the EDHS website, arranged in specific collections. Within each collection, documents are arranged in numerical order and each listing contains links to the abstract information as well as the actual downloadable files. Be advised that a document can be listed in more than one catalog as it can pertain to many different areas of the project. This does not mean that there are multiple copies of a specific document file on the server. All links for a specific document file point to the same location on the server.

Documents are posted to the EDHS in PDF (Portable Document Format) and PostScript file formats. Some older documents may also be available in rtf (Rich Text Format) and text file formats. Milestone presentation packages are usually posted in PowerPoint and PDF file formats.


Portable Document Format was created by Adobe Systems, Inc. and is a platform-independent, compressed file format. PDF files are presented as a WYSIWIG document that can be searched, zoomed, and easitly navigated. To view a PDF file, the user must have (at a minimum) the Adobe Acrobat Reader software. This is freeware and can be easily obtained from the Adobe Systems web site.


PostScript is the page description language developed by Adobe and is generally used for printing to PostScript printers. MacIntosh users may download a PostScript file and print it with the help of the DropPS print driver. PC and Unix users may download Postscript files for viewing and printing with the help of Ghostview or Ghostscript software. We currently create Postscript files as Level 2 files with the font inclusion of "all but the standard 13" fonts.

File/MIME Types

Web browsers contain list of file/MIME (Multipurpose Internet Mail Extension) types which tell the browser what action to perform when it encounters various file types. This list is usually labelled helpers or applications and can be found in preferences. If a user downloads a file that is not in configured in this list, the browser should prompt the user for an action (i.e. either saving the file to disk or launching an application to view the file). The following list includes the most common file types/extension used on the EDHS:




Acrobat Reader


Save to Disk

.doc, .rtf

MS Word


MS Excel


MS PowerPoint

.txt Simpletext (Mac); Notepad (PC)

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