Venus Express Archiving Status

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Venus Express Archiving Status

• R. Beebe
• PDS MC
• Nov 29, 2006

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VEX ORBIT CHARACTERISTICS

• 24 hours period
• 24 250-400 km pericentre altitude
• 66000 km apocentre altitude
• 90 deg inclination
• Pericentre latitude 80 deg N
• 7-10 hours communication link per orbit

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VEX PAYLOAD

• PFS (V. Formisano) - high resolution IR Fourier
  spectrometer
• SPICAV / SOIR (J.-L. Bertaux) -UV IR
  spectrometer for solar/stellar occultations and
  nadir observations
• VIRTIS (P. Drossart, G. Piccioni) - UV-vis-near
  IR imaging and high resolution spectrometer
• VMC (W.J. Markiewicz) - Venus Monitoring Camera
• VeRa (B. Häusler) - radio science experiment
• ASPERA (S. Barabash) - Analyzer of Space
  Plasmas and
• Energetic Atoms
• MAG (T. Zhang) Magnetometer

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PFS (not working)

• PFS would have be able to measure the temperature
  of the atmosphere between 55 and 100 km of
  altitude at very high resolution.
• It would have also measured surface temperature,
  looking for volcanic activity.
• The instrument would have been able to make
  compositional measurements of the atmosphere
• Principal Investigator Vittorio Formisano,
• IFSI-CNR,
  Rome, Italy
• Heritage Mars Express

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SPECTRAL RANGE
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FIELDS OF VIEW
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VEX U.S. Participants-40-50K/yr

• Participating Scientists
• Len Tyler A. Stern S. Boucher
• C. Russell J. Luhmann
  S. Limaye
• P. Brandt K. Baines/D. Crisp
  S. Atreya
• C. Acton
• IDS Y. Yung D. Grinspoon
• Support Investigators
• David Brain -superthermal electron measurement
• Bob Carlson -Venus Surface and Clouds
• David Schwenke -CO2 Opacities
• Responded to questionnaire

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VEX QUESTIONAIRE

• 1. Have you accessed useful data to allow you to
  pursue the science  interpretation and support
  you specified in your funded proposal?
• 2. If not, why?
• 3. If appropriate, could you assess the level of
  calibration your  team has achieved?
• 4. Are the data products you have access to the
  same ones that will  be archived in the PSA?
• 5. What is the status of the "spring "archive
  delivery?

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ASPERA

• Will investigate the interaction between the
  solar wind and the atmosphere of Venus by
  measuring outflowing particles from both the
  planets atmosphere and the solar wind.
• Principal Investigator Stas Barabash,
• ISP
  Kiruna, Sweden
• Heritage Mars Express
• I haven't accessed the VEX data yet, but a
  grad student from the ASPERA group has recently
  arrived from Kiruna to work with me for a few
  months at SSL and I am hoping to learn how to
  access and use their data.
• J Luhmann

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SPICAV

• Will determine the density and temperature of the
  atmosphere between 80 and 180 kilometres of
  altitude. It will search for small quantities of
  water, sulphur compounds and molecular oxygen in
  the atmosphere of Venus
• Principal InvestigatorJean-Loup Bertaux,
• CNRS,
  France
• Heritage Mars Express
• We have not been able to obtain any useful
  data. According to Jean-Loup te UV detector of
  SPICAM was noisy. They have increased the gain to
  a level necessary for airglow measurements. We
  are optimistic that airglow data will become
  available shortly.
• S. Rafkin with A Stern S. Boucher

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VIRTIS

• Will be able to study the composition of lower
  atmosphere, below the cloud decks at 35-40
  kilometers altitudes. It will track clouds in
  both ultraviolet and infrared wavelengths, in
  order to study atmospheric dynamics at various
  altitudes.
• Principal Investigators Pierre Drossart, Obs. De
• 
  Paris,Giuseppe Piccioni,
• CNR IASF,
  Rome
• Heritage Rosetta
• 11/20 calibration is excellent data delivery
  should be on time
• Bob Carlson

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MAG

• Will measure the magnetic field around the planet
  induced by the interaction between the solar wind
  and the atmosphere. It will help understanding
  its effect on Venusian atmosphere.
• Principal Investigator Tielong Zhang, IWF, Graz
• HeritageNEW, design from Rosetta lander
• Based on this first release and my knowledge
  of the correction algorithms still in
  development, I expect that the final data set for
  the magnetometer will be available about Jan 1.
• C. Russell

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VMC

• VMC is a wide-angle multi-channel camera that
  will take pictures at near infrared, ultraviolet
  and visible wavelengths. It will be able to
  produce global images and study cloud dynamics
  and image the surface. It will also assist other
  instruments in the identification of phenomena.
• Principal Investigator Wojciech Markiewicz.
• MPI-Ae, Katlenburg,-Lindau,
  Germany
• Heritage NEW

The VMC calibration has been a work in progress
due to damage caused by harmful exposure to the
Sun. In the UV filter, a few scan lines have
much reduced sensitivity, thereby creating a dark
band in all the images. In all four filters,
there is appreciable debris that appears to be
temperature sensitive and poses problems in
flat-fielding the images. Over the last few
months the pattern has apparently stabilized
somewhat and plans were being made to obtain
decent flats that will enable removing the
blemishes in all four filters, rendering the
data more useable. Sanjay Lamaye
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VERA

• Uses the radio link between the spacecraft and
  Earth to investigate the ionosphere of Venus. It
  will allow the study of density, temperature,
  pressure of the atmosphere at altitudes of 35-100
  kilometers. It will also characterize the solar
  wind in the inner Solar System.
• Principal Investigator Bernd Hausler,
• U. der Bunderswehr, Munchen,
  Germany
• Heritage Mars Express

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NAIF

• NAIF has acquired VEX SPICE products from ESTEC
  as planned. The NAIF location of the VEX kernels
  is
• ftp//naif.jpl.nasa.gov/pub/naif/VEX/kernels/E
  xpress
• A new ESA new hire will be assembling the
  SPICE data into an archive volume following the
  already carefully peer reviewed (by NAIF) MEX
  SPICE archive.  Once this is complete it will be
  provided to Boris Semenov for review.
• C. Acton

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VEX STATUS

• Maud Barthelemy is PSA VEX Archivist - She moved
  to ESOC in mid-Nov.
• First data release in March (J. Zender -21 Nov
  06)
• PSA is receiving first data sets now for review -
  assessed quality may modify release schedule.
• Data Peer review will be organized for Jan/Feb
  07
• Data Management (Archive )Plan Signed
• EAICDs are in ongoing development

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VEX PEER REVIEW

• Boris Semenov committed for NAIF aspects
• The ATMOS node personnel (Chanover, Huber
  Beebe) plan to assist review of documentation
  and data relative to PDS conformance and
  scientific usability.