SDDAS - Southwest Research Data Display & Analysis System


            _A_d_d_r_e_s_s:
               Southwest Research Institute (SwRI)
               Division of Instrumentation and Space Sciences
               P.O. Drawer 28510
               San Antonio, TX 78228-0510

            _E_m_a_i_l: sddas-help@swri.edu

            _P_h_o_n_e: (512) 522-3259


            _D_e_s_c_r_i_p_t_i_o_n

            The SDDAS maintains a large optical disk  database  of  data
            returned  by the Dynamics Explorer satellites 1 & 2. It pro-
            vides interactive tools for displaying this data in  various
            ways and selected subsets may be acquired via anonymous FTP.
            This data is primarily used by those doing research in space
            physics,  magnetospheric  physics,  and  the dynamics of the
            upper atmosphere. The measurements are  classified  as  fol-
            lows: DC magnetic field; AC electric field; particles; elec-
            tron and ion ionospheric temperature and density; ion compo-
            sition  and  drift; thermal neutral drift, composition, den-
            sity, and temperature.

            _N_e_t_w_o_r_k _A_c_c_e_s_s

            Access is made via  TELNET  to  espsun.space.swri.edu  using
            port   10000.   One  may  also  request a private account if
            extensive use is projected. NASA sponsored investigators may
            access this system through the NASA Master Directory on host
            nssdca.gsfc.nasa.gov. X-window system servers are  supported
            for graphical displays.

            _W_h_o _C_a_n _U_s_e _S_D_D_A_S

            A potential user must receive verbal authorization from  Dr.
            J.  D.  Winningham   (512-522-3075  or dwinningham@swri.edu)
            before  making use of this resource.  A User's Guide will be
            _________________________
            The information in this section is provided  in  accor-
            dance  with the copyright notice appearing at the front
            of this guide.




            April 17, 1992              NNSC        Section 3.7,  Page 1








            sent  to  each  authorized user.  There are no  restrictions
            on who may use this system, except that credit must be given
            in  any  publications  that result from its  use.  There  is
            also a limit of 8 users at any one time.

            _M_i_s_c_e_l_l_a_n_e_o_u_s

            A detailed list of the data holdings may be  requested  from
            sddas-help@swri.edu.    The   database   server   is  a  SUN
            SPARCserver 330, soon to be upgraded with  additional  CPUs.
            The  SDDAS  software  is  available  to  qualified users for
            installation on  their  own  workstations.  Immediate  plans
            involve  the  addition  to the archive of particle and field
            measurements from the Upper Atmosphere Research Satellite.





































            April 17, 1992              NNSC        Section 3.7,  Page 2