?url_ver=Z39.88-2004&rft_id=10.1029%2F2007GL032252&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=King%2C+MA&rft.aulast=King&rft.aufirst=MA&rft.issue=L03302&rft.volume=35&rft.date=2008&rft.issn=0094-8276&rft.atitle=Subdaily+signals+in+GPS+observations+and+their+effect+at+semiannual+and+annual+periods&rft.title=Geophysical+Research+Letters&rft.pages=1-5&rft.genre=article