H. Lauche

Publications (7)3.61 Total impact

• Article: Rosina – Rosetta Orbiter Spectrometer for Ion and Neutral Analysis

  H. Balsiger, K. Altwegg, P. Bochsler, P. Eberhardt, J. Fischer, S. Graf, A. Jäckel, E. Kopp, U. Langer, M. Mildner, [......], B. Wilken, F. Gliem, B. Fiethe, T. I. Gombosi, B. Block, G. R. Carignan, L. A. Fisk, J. H. Waite, D. T. Young, H. Wollnik
  [show abstract] [hide abstract]
  ABSTRACT: The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) will answer important questions posed by the mission’s main objectives. After Giotto, this will be the first time the volatile part of a comet will be analyzed in situ. This is a very important investigation, as comets, in contrast to meteorites, have maintained most of the volatiles of the solar nebula. To accomplish the very demanding objectives through all the different phases of the comet’s activity, ROSINA has unprecedented capabilities including very wide mass range (1 to >300 amu), very high mass resolution (m/Δ m > 3000, i.e. the ability to resolve CO from N2 and 13C from 12CH), very wide dynamic range and high sensitivity, as well as the ability to determine cometary gas velocities, and temperature. ROSINA consists of two mass spectrometers for neutrals and primary ions with complementary capabilities and a pressure sensor. To ensure that absolute gas densities can be determined, each mass spectrometer carries a reservoir of a calibrated gas mixture allowing in-flight calibration. Furthermore, identical flight-spares of all three sensors will serve for detailed analysis of all relevant parameters, in particular the sensitivities for complex organic molecules and their fragmentation patterns in our electron bombardment ion sources.
  Space Science Reviews 01/2007; 128(1):745-801. · 3.61 Impact Factor
• Article: UVIS/HDAC Lyman-alpha observations of the geocorona during Cassini's Earth swingby compared to model prediction

  S. Werner, H. U. Keller, A. Korth, H. Lauche
  Advances in Space Research, v.34, 1647-1649 (2004).
• Source

  Available from: George Randall Gladstone

  Article: Neutral hydrogen density profiles derived from geocoronal imaging

  N. Østgaard, S. B. Mende, H. U. Frey, G. R. Gladstone, H. Lauche
  Journal of Geophysical Research, v.108 (2003).
• Source

  Available from: Peter Wurz

  Article: Rosetta Orbiter Spectrometer for ion and neutral analysis ROSINA

  H. Balsiger, K. Altwegg, P. Bochsler, P. Eberhardt, J Fischer, S. Graf, A. Jäckel, E. Kopp, U. Langer, M. Mildner, [......], B. Wilken, F. Gliem, B. Fiethe, T. I. Gombosi, B. Block, G. R. Carignan, L. A. Fisk, J. H. Waite, D. T. Young, H. Wollnik
  Rosetta-ESA's Mission to the Origin of the Solar System, 485-536 (2009).
• Source

  Available from: A. Korth

  Article: The Cassini ultraviolet imaging spectrograph investigation

  L. W. Esposito, C. A. Barth, J. E. Colwell, G. M. Lawrence, W. E. McClintock, A. I. F. Stewart, H. U. Keller, A. Korth, H. Lauche, M. C. Festou, A. L. Lane, C. J. Hansen, J. N. Maki, R. A. West, H. Jahn, R. Reulke, K. Warlich, D. E. Shemansky, Y. L. Yung
  Space Science Review, v.115, 299-361 (2004).
• Source

  Available from: A. Korth

  Article: Cassini ultraviolet imaging spectrometer observations of the Venus dayglow.

  A. I. F. Stewart, L. W. Esposito, C. A. Barth, J. E. Colwell, G. M. Lawrence, W. E. McClintock, W. R. Pryor, H. U. Keller, A. Korth, H. Lauche, M. C. Festou, A. L. Lane, C. J. Hansen, J. N. Maki, R. A. West, H. Jahn, R. Reulke, K. Warlich, D. E. Shemansky, Y. L. Yung
  31:1174.
• Article: UVIS/HDAC Lyman-α observations of the geocorona during Cassini’s Earth swingby compared to model predictions

  S. Werner, H.U. Keller, A. Korth, H. Lauche
  [show abstract] [hide abstract]
  ABSTRACT: The Hydrogen Deuterium Absorption Cell (HDAC) is part of the Ultraviolet Imaging Spectrograph (UVIS) experiment aboard the Cassini spacecraft. During Cassini’s Earth swingby on August 18, 1999, HDAC was used as a photometer to measure solar Lyman-α radiation scattered by the neutral hydrogen atoms of the geocorona. These data provide information about the hydrogen column density along HDAC’s line of sight during the Earth swingby. The data cover a large part of the Earth’s exosphere and enable us to determine the distribution of hydrogen atoms in this region. The results are compared to predictions of models providing hydrogen densities of the Earth’s exosphere/geocorona. We found that the models overestimate the decrease of hydrogen density for increasing distance from the Earth.
  Advances in Space Research.