@conference{1124,
  author = {Christine Hackman and Judah Levine},
  title = {Adding water vapor radiometer data to GPS carrier-phase time transfer},
  year = {2004},
  month = {2004-12},
  url = {http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2\&doc=GetTRDoc.pdf\&AD=ADA485040},
  note = {JILA Pub. 7909},
}