# Presentation: 514198

## Venus Express Archiving Status

- R. Beebe
- PDS MC
- Nov 29, 2006

- VEX Status

- Nov 29, 2006

## 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

- VEX Status

- Nov 29, 2006

## 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

- VEX Status

- Nov 29, 2006

## 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

- VEX Status

- Nov 29, 2006

## SPECTRAL RANGE 

- VEX Status

- Nov 29, 2006

## FIELDS OF VIEW  

- VEX Status

- Nov 29, 2006

## 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**

- VEX Status

- Nov 29, 2006

## 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?

- VEX Status

- Nov 29, 2006

## ASPERA 

- Will investigate the interaction between the solar wind and the atmosphere of Venus by measuring outflowing particles from both the planet’s 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**

- VEX Status

- Nov 29, 2006

## 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 Investigator:Jean-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**

- VEX Status

- Nov 29, 2006

## 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**

- VEX Status

- Nov 29, 2006

## 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
-  Heritage:NEW, 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**

- VEX Status

- Nov 29, 2006

## 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**

- VEX Status

- Nov 29, 2006

## 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

- VEX Status

- Nov 29, 2006

## 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/Express**
**    ****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**** **

- VEX Status

- Nov 29, 2006

## 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

- VEX Status

- Nov 29, 2006

## 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.

- VEX Status

- Nov 29, 2006