STEP: A Status Report

  • Nick Lockerbie
  • John C. Mester
  • Rodney Torii
  • Stefano Vitale
  • Paul W. Worden
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 562)


This paper presents an overview of the current technical status of STEP, the Satellite Test of the Equivalence Principle. STEP was originally presented as a candidate for ESA’s M2 mission as a joint mission with NASA, and has since been studied as an M3 candidate, and under NASA as QuickSTEP and MiniSTEP. Studies especially during the last two years have resolved some long standing issues such as control of helium tide, improved the mission definition and error analysis, and have resulted in an improved baseline design which should be capable of comparing rates of fall to an accuracy approaching 10-18.


Equivalence Principle Gravity Gradient Test Mass Magnetic Bearing Particle Radiation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Nick Lockerbie
    • 1
  • John C. Mester
    • 2
  • Rodney Torii
    • 2
  • Stefano Vitale
    • 3
  • Paul W. Worden
    • 2
  1. 1.Department of Physics and Applied PhysicsUniversity of StrathclydeUK
  2. 2.W.W. Hansen Experim. Physics LabsStanford UniversityStanford, CaliforniaUSA
  3. 3.Department of PhysicsUniversitá TrentoProvoItaly

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