D. Gritti

Publications (2)0 Total impact

• Conference Proceeding: Physics package of the 35kg space active hydrogen maser for the ACES space mission of ESA

  S. Zivanov, H. Schweda, D. Goujon, D. Gritti, G. Perruchoud
  [show abstract] [hide abstract]
  ABSTRACT: The 35 kg space active space hydrogen maser (SHM) is part of the atomic clocks ensemble in space (ACES) mission of ESA. The physics package (PP) of the engineering model (EM) of the SHM is currently developed at the observatoire de neuchatel and for the nominal operational parameters has the long-term frequency stability of 1.5x10^-15@10'000 s. In this article we report the latest developments on the PP of the EM.
  Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International; 07/2007
• Conference Proceeding: The 35 kg space active hydrogen maser (SHM-35) for ACES

  A. Jornod, D. Goujon, D. Gritti, L.G. Bernier
  [show abstract] [hide abstract]
  ABSTRACT: A 35-kg active hydrogen maser is in an advanced stage of development at the Observatory of Neuchatel (ON) for the European mission ACES (atomic clock ensemble in space). The miniaturization of the instrument is based on a sapphire loaded microwave cavity. A frequency stability of 1.5×10^-15 over averaging time of 10'000 s is made possible by the use of an automatic cavity tuning system. A prototype model of the sapphire loaded microwave cavity has been operated continuously for more than two years. The engineering (EM) and the flight (FM) models of the microwave cavity assembly have already been manufactured. In this paper, the design of the instrument is presented. The overall expected performances as well as measurement results are reported.
  Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003 IEEE International; 06/2003