@conference{6627,
  author = {K. Larson and L. Nelson and Judah Levine and T. Parker and E. Powers},
  title = {A long-term comparison between GPS carrier-phase and two-way satellite time transfer},
  year = {1998},
  url = {http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA507744},
  note = {JILA Pub. 6341},
}