GSAC Workshop at UNAVCO Boulder Facility

11-12 November 1997

-prepared by Wayne Shiver

Participants:

Rober Casey, IRIS, DMC
Jeff Dean, SOPAC
Maury Dube, NASA/CDDIS
Lou Estey, UNAVCO Boulder
Dan Johnson, PANGA
Hadley Johnson, SCEC
Tom Lockhart, JPL
Marty Marcin, JPL
Myron McCallum, UNAVCO Boulder
Chuck Meertens, UNAVCO Boulder
Barb Perin, UNAVCO Boulder
Chris Roelle, SOPAC
Bob Schutz, Univ. Texas-Austin
Paul Spofford, NGS
Bill Strange, NGS
Randolph Ware, UNAVCO Boulder
Wayne Shiver, UNAVCO Boulder
 

Need for Seamless Archive

• Meet sponsor and community demand for efficient, cost-effective and complementary GPS archives
• Improve efficiency of individual archive operations, e.g. shared tools, efficient off-site back-ups, shared development costs, reduced data storage costs, etc.
• Increase data availability
• Improve user access to data
• Ensure future availability of raw campaign and continuous GPS and all related data (e.g., meta-data and orbits) necessary for research applications
• Promote research based on archived GPS data

Goals for Seamless Archive

Identify ways to:

• Promote better mutual understanding of requirements and goals for individual archive centers
• Respond affirmatively and visibly to sponsor and community demand for ensuring future access to high quality data
• Promote common archiving standards and formats to extent deemed in the mutual best interest of participants
• Preserve ability of archives to meet their "unique" archiving requirements
• Save participants time and money resources in meeting archive responsibilities
• Apply new technology to old problems

Participant Input to Workshop Goals

Hadley Johnson

"Coordinate what we're doing with appropriate overlap - consider there might be a single primary location - from user point of view, this process should be hidden."

Jeff Dean

"Primary location is not the issue - primary source is what is important."

Tom Lockhart

"Reliable data delivery is critical."

Mark Murray

"Need to define data - raw data should be unique but RINEX can differ."

Chuck Meertens

Presented a list of data types for general discussion.

Bob Schutz

"Looking for one-stop-shopping for any data, meta-data and data products."

Bill Strange

"Need to factor in resource issues that may limit what can be done."

Hadley Johnson

"The above discussion highlights the fundamental difference in continuous and campaign data."

Random Thoughts from Participants

Coordinate what "active" archives are doing

Value added process

Consider data storage capacity/cost and network speed and bandwidth

Must know what data exists and where

Improve user access to data and use of archives

Improve access to meta-data

Make transparent the issue of data location

Deal with primary "cultural" differences between real-time data archives and non-real-time archives

Short-Term Goals

1. Four short-term development goals were identified:
• Table (1) of meta-data describing data available by year (w/periodic updates)
• Table (2) of meta-data describing data available by day
• Table (3) providing information on how to obtain data identified in Tables (1) and (2)
• Process for distributing data between centers



2. Hadley Johnson, Chuck Meertens, Mark Murray and Duncan Agnew will develop draft of standard content for Tables (1) and (2) by December 6, 1997
3. SOPAC and UNAVCO Boulder will develop exchange files for their Tables (1) and (2) by end of February 1998
4. CDDIS, NGS (Table 1 only), SCEC, BARD and PANGA will develop exchange files for their Tables (1) and (2) by end of April 1998. Other archive centers and regional GPS networks will be encouraged to join in this process
5. Tables (1) and (2) files will be exchanged between all groups by early May 1998
6. Target date of June 1, 1998 to have ability to "browse" Tables(1) and (2) at multiple "Data Center" locations
7. JPL (Tom Lockhart) and SOPAC (Jeff Dean) will immediately initiate a pilot demonstration to exchange data between centers to be completed by mid-December 1997. CDDIS (Maury Dube) and UNAVCO (Myron McCallum) will support and participate in the demonstration. The results of the demonstration will be used to develop the format and content of Table (3).
8. The next seamless archive meeting will be June 1998, tentatively at Scripps.

Comments or questions about this page? Send e-mail to Lou Estey (louunavco.org).

Last modified Thursday, 17-Nov-2005 04:21:00 UTC

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