Table A2. - GPS data sets (experiments) used in this study.

Survey Name    Identity   Time     Type     Length     Lead Agencies

Pre-earthquake:
HPGN-Densif.    HPGN-D2  Oct.'92   TR-C1/P2  2-6 hr.   Caltrans/NGS
Inter-County    IC'93    July'93   TR/AS3    6   hr.   USGS/SCEC
Part.  HPGN-D   HPGN-D3  Oct.'93   TR-C1/P2  2-6 hr.   Caltrans
Ventura  Basin  VB'93    Nov.'93   OS-TR4    24+ hr.   JPL/MIT

Post-earthquake:
Eq. Response    EQ'94    Jan.'94   TR/AS5    6-24+ hr. USGS/SCEC
HPGN & HPGN-D   COOP'94  Feb.'94   TR-C/P6   2-6  hr.  Caltrans/NGS

Continuous:     PGGA    all above  TR-P2,AS5,OS-TR4    UCSD/JPL

1   TR-C  refers to Trimble 4000 SST model receivers:  dual-
  frequency L2-codeless.  Geodetic control purposes  to  NGS
  first-order "Group B" specifications.
2   TR-P  refers to Trimble 4000 SSE model receivers:  dual-
  frequency P-code.  Geodetic control purposes to NGS first-
  order "Group C" specifications.
3   The  Inter-County 1993 survey used a mix of  TR-C/P  and
  Ashtech (AS) C/P receivers.
4  OS-TR refers to Osborne TurboRogue model receivers:  dual-
  frequency P-code.
5   The  earthquake response surveys within  the  first  few
  weeks  used  a mix of TR-C/P, OS-TR, and AS-C/P receivers.
  Stations  of  the  HPGN,  HPGN-D,  IC  and  VB  nets  were
  occupied.   This  was a cooperative effort  of  scientists
  represented  in  this  paper, many in the  acknowledgments
  section.
6   The HPGN and HPGN-D network stations within a radius  of
  about  75  km  of  the  mainshock were  surveyed  in  mid-
  February   1994,   cooperatively  with  local   government
  agencies and SCEC.

Table A2 - References:

October/November 1992 - Caltrans HPGN-D.  Supervised by  Jay
  Satalich,  Caltrans  District 7.  Processed  by  UCLA  and
  USGS.
July,  1993  - USGS/SCEC Inter-County Survey.  Organized  by
  Ken Hudnut, USGS.  Processed by UCLA, MIT, USGS.
October  1993  - Caltrans HPGN-D partial survey.  Supervised
  by  Jay Satalich, Caltrans District 7.  Processed by  UCLA
  and USGS.
November  1993 - JPL/MIT Ventura Basin Survey (Donnellan  et
  al.,  1993  a  & b).  Organized by Andrea Donnellan,  JPL.
  Processed by MIT and JPL.
January/February   1994   -   USGS/UCLA/JPL/MIT/UCSD   post-
  earthquake   response  surveys  (Hudnut  et  al.,   1994).
  Organized   by  Ken  Hudnut,  USGS  (IC  and   HPGN/HPGN-D
  stations)   and  Andrea  Donnellan,  JPL  (VB   stations).
  Processed by JPL (VB stations), UCLA (all stations),  USGS
  (all), and MIT (all).
February  1994  -  Caltrans/NGS cooperative  post-earthquake
  survey.    Organized  by  Don  D'Onofrio,  NGS   and   Jay
  Satalich, Caltrans District 7. Processed by UCLA & MIT.
All of the global and regional GAMIT tracking solutions were
  produced by UCSD (Fang et al., 1992) and all of those  for
  GIPSY were produced by JPL (Zumberge et al., 1992).
Software  used in these data analyses included FONDA  (Dong,
  1993),   GAMIT   (King  and  Bock,  1994),  GIPSY/OASIS-II
  (Blewitt  et  al.,  1993b, Webb and Zumberge,  1993),  and
  GLOBK (Herring, 1993).

Table A2 - Acronym Key:

  California    Division   of   Transportation   (Caltrans),
  National Geodetic Survey (NGS), Jet Propulsion Lab  (JPL),
  Massachusetts Inst. of Technology (MIT), Univ.  of  Calif.
  Los  Angeles (UCLA), and Scripps Inst. at Univ. of  Calif.
  San   Diego   (Scripps/UCSD),  and   Southern   California
  Earthquake  Center  (SCEC) - in some  places  representing
  contributions  of  all  collaborating  universities  (MIT,
  UCLA, UCSD) as well as JPL.