Analysis Center Response Form
             Joint CSTG/IERS Call for Participation
     International VLBI Service for Geodesy and Astrometry

Analysis Center name: Haystack Observatory   
Type of analysis center: global___   special__X_

Parent/Funding organization:  NASA Goddard Space Flight Center

Name and title of primary scientific/technical contact:     
Dr. Arthur Niell, Principal Research Scientist

Name and title of administrative contact:  Dr. Arthur Niell

Mailing address:    Haystack Observatory, Westford, MA 01886

Phone:         1-978-692-4764           Fax: 1-781-981-0590

E-mail address:     aniell@haystack.mit.edu       
Web address: http://web.haystack.mit.edu/vlbi/vlbi.html

If applying as a Special Analysis Center, describe the special
type(s) of analysis you will perform. If applying as a Global
Analysis Center, describe the global analysis you will perform.
Indicate your specific analysis interests and describe how you
select the data you analyze. 
    Our analysis interest is in improving systematic errors,
  particularly atmospheric and instrumental effects. Proposed
  model changes will be evaluated by comparing solutions for
  experiments involving the best stations, formerly the R&D
  experiments, using the SOLVK analysis package.

Describe the computer hardware configuration and the software
package(s) you use for analysis. 
   SOLVK running on HP835 unix system.; matlab on a PC; fortran
programs on the unix system.

Internet connection type or bit rate:        T1   Data storage capacity: 15 GB

Describe any planned facility upgrades. None

Number of full-time-equivalent personnel assigned to analysis
center functions:   0.5

Indicate which data center(s) you use:  cddis

Indicate which of the following IVS Analysis Center functions you
will perform and explain briefly how you will perform them:
     Provide timely feedback to stations
     Create high quality products and perform timely archiving and distribution
     Place final results (TRF, CRF, EOP, and others) in IVS Data Centers
X    Perform software development and documentation: We will
develop software for modeling atmospheric effects and
instrumental effects. We developed the model known as NMF (New
Mapping Function) and it has proven effective in reducing
unmodeled errors. We will pursue research efforts to improve the
mapping function and explore its applicability to GPS analysis
and comparisons of results.
X    Compare products: We will compare our analysis results
using various models to determine the models that best reduce
systematic error. We will compare our results with those of other
software packages to explore the effects of modeling on final
results.
     Adhere to IERS Conventions    

Attach a list of personnel (names and titles) whom you designate
as IVS Associate Members through their affiliation with your
analysis center.    
     Dr. Arthur Niell, Principal Research Scientist, aniell@haystack.mit.edu
     Dr. Brian Corey, Research Scientist, bcorey@haystack.mit.edu

Please provide any other information that you feel will be
helpful in demonstrating your analysis center's capabilities to
participate in the IVS. If you proposed to the IERS in 1995/6 as
an analysis center and wish to have that proposal carry over to
the IVS, please make such a statement in this proposal. 

Your signature on this form indicates your agreement to
participate in the IVS as an Analysis Center and to work closely
with the IVS Analysis Coordinator. If this is a new proposal
(i.e. not carried over from IERS) your signature commits your
organization to participate in the IVS.

Name of person signing:  John Bosworth       
Title:    Associate Chief, Laboratory for Terrestrial Physics

Signature: _________________________________________   Date: _________________