[IGSMAIL-3472]: Honors Reception - September 3, Budapest

[Ruth E. Neilan]

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IGS Electronic Mail      16 Aug 17:18:36 PDT 2001      Message Number 3472
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Author: Ruth Neilan & Carey Noll



                   Invitation to a Reception Honoring

                     John Bosworth  --- Tom Clark

                      during the venue of the
                     IAG Scientific Assembly 2001

        Hosted by the IAG Services: IERS, ILRS, IVS, and IGS



Dear colleagues,

In June of this year two people retired from long-held leadership 
positions in the development and evolution of space geodesy -  John 
Bosworth and Tom Clark of NASA's Goddard Space Flight Center. 

John was a central figure in the Crustal Dynamics Project and 
follow-on activities for the last 20 years. With this retirement he 
will also be vacating his position as the first Director of the 
Central Bureau of the International Laser Ranging Service and Chair 
of the CSTG Sites sub-commission.

Tom Clark is widely recognized as the 'Guru' of VLBI, and has an 
impressive 32 year involvement in its development.  Both Tom and John 
are have had influence on GPS: John's pursuing the multi-technique 
collocation site ties, and Tom's operations of the GPS equipment at 
GSFC, his totally accurate clock (TAC), and phase center measurements 
of the GPS antennae. 

An interesting review of their professional careers is planned with 
your help. We invite you to attend and if you have a particular 
memory that you will share, it will contribute to a memorable 
evening! Please join us:


                           Honors Reception

                     John Bosworth  --- Tom Clark

                       Monday, September 3, 20001
                            6:00 - 9:00 PM

                    Taverna Hotel - Budapest Rooom
                     1052 Budapest, Váci utca 20.

                        Phone: +361 485 3100
                        Fax: +361 485 3111


  * Excellent Hors D'Oeuvres will be served, cash bar.

  * Bring your memories and enjoy an evening with friends.

** Please RSVP **  reply to this message or send a message to 
ruth.neilan at jpl.nasa.gov with the word 'Reception' in the Subject.


Additional Detail

John Michael Bosworth, Associate Chief of the Laboratory for 
Terrestrial Physics and Head of the Space Geodesy and Sensor 
Calibration Office (Code 920.1), retired from GSFC on June 1 
following almost 40 years of federal service, all but two years with 
NASA. Mr. Bosworth was honored by many individuals or organizations 
at his retirement dinner on June 12. John had a long and successful 
career as a Project Manager at Goddard but is perhaps best remembered 
for his past two decades of effort on behalf of space geodesy - first 
as Deputy Manager under Dr. Bob Coates, and then later as Manager, of 
NASA's Crustal Dynamics Project (CDP). The CDP scored many scientific 
firsts in making precise contemporary measurements of tectonic plate 
motion, regional crustal deformation, Earth orientation parameters 
(spin axis orientation and spin rate or length of day), Earth gravity 
field, etc.  Following the termination of CDP in 1993 and the 
movement of space geodetic network responsibilities to GSFC's 
Laboratory for Terrestrial Physics, John retained primary 
responsibility for the management of NASA's SLR and VLBI networks and 
served as head of the CSTG Sites Subcommission and as the first 
Director of the International Laser Ranging Service (ILRS) Central 
Bureau, which is located at GSFC.



Dr. Thomas Arvid Clark retired from GSFC on June 1, 2001. Tom 
received his B.S. in Engineering Physics and his Ph.D. in 
Astro-Geophysics from the University of Colorado in 1961 and 1967 
respectively. From 1966 to 1968, he served as Chief of the Astronomy 
Branch at NASA Marshall Space Flight Center and as Project Scientist 
on the Spacelab Coronagraph. Since arriving at GSFC in 1968, Dr. 
Clark has received numerous NASA awards for his pioneering work on 
Radio Astronomy Explorer 1 and 2 and several generations of Very Long 
Baseline Interferometry (VLBI) systems. Since the beginning of the 
NASA Crustal Dynamics Project in 1979, a global network of 
approximately 30 VLBI stations have been used to define the Celestial 
reference Frame and to measure global plate tectonics, Earth 
orientation parameters, and Universal Time. In recent years, he 
developed the Totally Accurate Clock (TAC), an inexpensive GPS timing 
receiver that has found widespread use in a number of global 
networks. Tom was named a Fellow of the American Geophysical Union 
(AGU) in 1991 and a Fellow of the International Association of 
Geodesy (IAG) in 1999. Tom was also a pioneer in amateur and digital 
radio; he designed and flew several low cost satellites for relaying 
amateur radio messages around the globe and is a past president of 
AMSAT. In May 2001, he was one of only 50 initial inductees into the 
CQ Amateur Radio Hall of Fame, a list which included such engineering 
luminaries and inventors as Guglielmo Marconi (radio), Samuel Morse 
(telegraph), Nikola Tesla (HF generators and radio), and John Bardeen 
and William Schockley (transistor). Dr. Clark has applied for GSFC 
Emeritus status.

-- 

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
IGS Central Bureau/Jet Propulsion Laboratory
tel: 818-354-8330, fax: 818-393-6686
       <igscb at igscb.jpl.nasa.gov>