Mars Pathfinder

Internet users around the world may begin following the Mars Pathfinder spacecraft as it approaches Mars and prepares for a July 4 landing by way of a variety of local mirror sites that are now online.

The Internet sites feature updates on mission activities, and will provide Pathfinder photographs of the Martian surface once they become available. The sites also feature a bird's eye view of the Mars Pathfinder mission operations area at NASA's Jet Propulsion Laboratory, Pasadena, CA, via a live video camera feed that is updated every 15 minutes.

"We're expecting a siege of hits on July 4," said David Dubov, Mars Pathfinder webmaster at JPL. "Our best estimate, based on past events such as Galileo, the Comet Shoemaker-Levy 9 collision in 1994, Comet Hale-Bopp's return and other celestial events has led us to plan for at least 25 million hits on July 4, and a similar level of hits per day during the week following landing."

To accommodate the overwhelming interest among the public, JPL will have about 20 mirror sites around the world by the end of June so that people can use the sites closest to their homes rather than trying to access the JPL site. "Most of the domestic sites were picked because of their connection to the National Science Foundation backbone, a very robust network that can handle high traffic," said Kirk Goodall, Mars Pathfinder web engineer. "Combined, these mirror sites will be able to service up to 30 million hits per day."

During landing day activities and the Pathfinder rover's primary, seven-day mission, members of the public should access the following Pathfinder mirror sites closest to their homes:

CORPORATE MIRROR SITES

Silicon Graphics Computer Systems, Inc.

http://mars.sgi.com

Load capacity per day: 15 million hits/day

CompuServe, Inc.

http://mars.compuserve.com

Load capacity per day: 10 million hits/day

Sun Microsystems, Inc.

http://www.sun.com/mars

Load capacity per day: 6 million hits/day

PUBLIC SECTOR MIRROR SITES

NASA Ames Research Center

Moffet Field, CA

http://mpfwww.arc.nasa.gov

Load capacity per day: 5 million hits/day

National Center for Supercomputer Applications (NCSA)

University of Illinois at Urbana-Champagne, IL

http://www.ncsa.uiuc.edu/mars

Load capacity per day: 4 million hits/day

Cornell Theory Center

Cornell University, NY

http://mars.tc.cornell.edu

Load capacity per day: 4 million hits/day

National Center for Atmospheric Research (NCAR #1)

Boulder, CO

http://www.mars.ucar.edu

Load capacity per day: 4 million hits/day

San Diego Supercomputer Center

San Diego State University, CA

http://mars.sdsc.edu

Load capacity per day: 4 million hits/day

NASA Kennedy Space Center

Cape Canaveral, FL

http://www.ksc.nasa.gov/mars

Load capacity per day: 2 million hits/day

Jet Propulsion Laboratory

Pasadena, CA

http://www.jpl.nasa.gov/mpfmir

Load capacity per day: 1 million hits/day

National Center for Atmospheric Research

(NCAR #2) Boulder, CO

http://mars.nlanr.net

Load capacity per day: 1 million hits/day

Pittsburgh Supercomputing Center

University of Pittsburgh, PA

http://www.psc.edu/Mars

Load capacity per day: 750,000 hits/day

NASA Lewis Research Center

Dayton, OH

http://pathfinder.lerc.nasa.gov

Load capacity per day: 500,000 hits/day

The Catlin Gabel School

Portland, OR

http://mars.catlin.edu

Load capacity per day: 500,000 hits/day

INTERNATIONAL MIRROR SITES

National Space Development Agency of Japan (NASDA)

Tokyo, Japan

http://mars.tksc.nasda.go.jp/JPL

Load capacity per day: 2 million hits/day

Centre National d'Etudes Spatiales (CNES)

France http://www-mars.cnes.fr

Load capacity per day: 1 million hits/day

The Australian Commonwealth Scientific and Industrial Research

Organization (CSIRO)

Sydney, Australia

http://sparkli.tip.csiro.au/mars/default.html

Load capacity per day: 1 million hits/day

Canberra Deep Space Communication Complex CDSCC - NASA/JPL)

Canberra, Australia

http://tid.cdscc.nasa.gov/mars

Load capacity per day: 500,000 hits/day

IKI (Institute for Space Science)

Moscow, Russia

http://www.iki.rssi.ru/jplmirror/mars

Load capacity per day: 250,000 hits/day

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C.


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