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FIRST U.S. SATELLITE LAUNCH ED 48 YEARS AGO



SUBMITTED BY ARTHUR N1ORC - AMSAT A./C #31468



Hi-Res (5.1M)
Dr. William Pickering
MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

Contact: Mary Beth Murrill January 28, 1998

SPACE PIONEERS RECALL FIRST U.S. SATELLITE LAUNCH UPON 48TH ANNIVERSARY

       Forty eight ago this week, a team of scientists and engineers 
successfully launched Explorer 1, the first U.S. satellite to orbit 
around Earth. This historic accomplishment marked the nation's debut in 
the Cold War-era space race and set the stage for the establishment of 
the civilian space agency that would become NASA.

       NASA's Jet Propulsion Laboratory, Pasadena, CA, was still 
operated as a research laboratory for the U.S. Army when it was selected 
in November 1957 to develop the first U.S. satellite, its science 
package, the communications system and the high-speed upper stages for 
the Army's Redstone rocket that would guide the tiny, 9-kilogram 
(20-pound) Explorer 1 into the great unknown. JPL and the Army completed 
the assignment and successfully launched the satellite in less than 
three months. JPL and the Army Ballistic Missle Agency, based in 
Huntsville, AL, joined in firing the satellite twoard space from the 
missle test center at Cape Canaveral, FL on Jan. 31, 1958.

       The scientific experiment onboard, a cosmic ray detector built by 
Dr. James Van Allen of the University of Iowa, soon returned one of the 
most important findings of the space program: the discovery of what are 
now known as the Van Allen Radiation Belts around Earth. Explorer 1 went 
on to operate for three months.

       Following the Soviet Union's launch of Sputnik on Oct. 4, 1957, 
"there was a lot of pressure to get a satellite in orbit as quickly as 
possible," said Dr. William Pickering, then JPL's director and 
orchestrator of the Explorer 1 effort at JPL.

       The intensive effort was accomplished by a team of experts from 
U.S. academia and the military, along with top World War II German 
rocket scientists such as Dr. Wernher von Braun, who emigrated to the 
U.S. in the postwar years to help lead development of American rocket 
capability. A globally linked telecommunications system developed by JPL 
tracked Explorer 1 and received its scientific data as it circled Earth. 
Amateur radio operators around the world were invited to listen in on 
Explorer 1's radio communications, including one key amateur radio shack 
operated largely by JPL ham radio operators at the Los Angeles County 
Sheriff's substation in Temple City, near JPL.

       The most difficult technical challenge, said Pickering, "was 
getting the three rocket stages to work consistently, to get it all to 
go in the right direction, with no guidance system." Considering the 
telecommunications and computing capability of the Explorer 1 era versus 
that available for last summer's Mars Pathfinder mission, Pickering 
said, "it's astonishing to think what has happened over 40 years."

       Van Allen, still an active planetary and space physics 
researcher, recalled that on the morning after the historic Explorer 1 
launch, "a big press conference had been called at the Great Hall of the 
National Academy of Sciences in Washington, D.C., and although it was 
1:30 in the morning, there was still a huge crowd of reporters waiting 
around."

       Donna Shirley, Mars Exploration Program manager at JPL, was in 
high school when the news hit that Explorer 1 had been launched. "It was 
a terrific emotional moment," she recalled. "It seemed like a scary 
thing that the Soviet Union was so powerful that they could launch 
Sputnik. When Explorer went up, it was, 'Rah, rah, our team!'" she said. 
"It seemed to be framed in 'us versus them' rather than focused on the 
real technical and scientific achievement. But the dawn of the space age 
affected my life a lot," she said.

       "I don't think the 'right stuff' to work in the space program has 
really changed all that much" since the days of Explorer 1, said 
Shirley. "You don't have cigar-smoking guys with slide rules anymore, 
but I think the 'right stuff' is still the same: dedication and competence."

       In late 1958, JPL was reassigned from the U.S. Army to NASA when 
the civilian space agency was created, and has helped lead the world's 
exploration of space with robotic spacecraft since then. Operated as a 
division of the California Institute of Technology, JPL has sent 
spacecraft to all of the known planets except Pluto, and this year will 
launch important astronomy and planetary exploration missions to comets, 
asteroids and Mars, along with many Earth-observing efforts.

       As the size of NASA's space missions take advantage of 
miniaturized electronics to shrink to fit the new "faster, better, 
cheaper" mold, some space science packages are about the size of that on 
tiny Explorer 1, Shirley said. "Miniaturization is allowing us to shrink 
down the brains of our spacecraft but still allow us to do more with 
them than we used to. And the challenge now is to shrink the rest of the 
spacecraft down."

       Considering the future of space science, Van Allen observed that 
"there is no shortage of great ideas on what we'd like to do. 'Faster, 
better, cheaper' is NASA's mantra, and the recent successful launch of 
the Lunar Prospector spacecraft is the best example of that. But the 
Hubble Space Telescope is a good example of big projects that will 
continue to be conducted. I think we have a very bright future in space 
science in all areas. There is good public support," he said.. "There is 
virtually no limit to what can be investigated in interplanetary science 
and astronomy."
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