Express Data Archive

Håkan Svedhem, Emmanuel Grotheer, Sebastien Besse ESA/ESTEC, ESA/ESAC ESAC Science Data Centre (ESDC) The Digital Library of the Universe

Ø Science archives co-located at ESAC • Astronomy, Planetary, Solar Heliospheric

Ø Different types of data: • Raw data, calibrated data, high level science products, documentation, SPICE, .. • All data public and available for free after a proprietary period

Ø Need to be kept readily available for different users: • Scientific Community (public access) • PI teams and observers (controlled access) • Science Operations Teams (privileged access)

Ø Archive Strategy Plan for 5-20+ years ESDC organizational structure

H/ESDC ESDC Head Scientist

Astronomy Archives Group Planetary Archives Group Solar Helio Archives Group

Astro. Archives Astro. Archives Planetary Archives Planetary Archives Solar Helio Solar Helio Science Lead Technical Lead Science Lead Technical Lead Archives Archives Science Lead Tech. Lead

Archive Software Engineers

Common software libraries and tools repository, full open source

Astronomy Planetary Solar Helio SOCs/SGSs SOCs/SGSs SOCs/SGSs The Planetary Science Archive

Services provided to the community

1. FTP repository will all datasets 2. Search interfaces (Metadata, maps) 3. Documentations 4. Ancillary datasets 5. Workshop and training 6. Support in the creation of archive compliant datasets

Science Payload

Name Instrument Principal Investigator

ASPERA Analyser of Space and S. Barabash, IRF, Energetic Ions Kiruna, Sweden.

MAG* T. Zhang, IWF, Graz, Austria. PFS Planetary Fourier Spectrometer V. Formisano, IFSI-CNR, (IR) Rome, Italy.

SpicaV/SOIR* UV-IR spectrometer for stellar J.-L. Bertaux, SA-CNRS, and occultation Verriere, France.

VERA Venus Radio Science B. Häusler, Uni-BW, Muenchen, Germany.

VIRTIS* UV-Vis-IR Mapping spectrometer P. Drossard, Obs de Paris, Meudon, France, G. Piccioni, IASF-CNR, Rome, Italy. VMC* Venus Monitoring Camera W. Markiewicz, MPS, Lindau, Germany

ARCHIVE ASPERA-4

• ELS – ELectron Spectrometer • Electron spectra containing a maximum of 128 steps x 16 sectors, raw data • IMA – Ion Mass Analyzer • Full 3D ion spectrum consisting of a maximum of 16 polar angle steps × 96 energy steps × 16 azimuthal sectors × 32 mass channel data, in raw counts • 3 values of post-acceleration are available • NPD – Neutral Particle Detector • Integral ENA fluxes containing 32 azimuthal sectors, raw data • NPI – Neutral Particle Imager • Each event is stored in the array: time-of-flight (velocity measurement) x stop pulse height (for mass identification) × azimuthal direction (out of 3) • Note that all 4 sets are raw data; CODMAC level 2 • Calibrated data, at various levels, available directly from the PI ARCHIVE MAG

• Raw data (level 2) • MAG-IS, MAG-OS in S/C coordinates, synchronized, in [nT], at: 1 Hz, 32 Hz, 128 Hz.

• Calibrated data (level 3) • Space magnetic field data in physically meaningful coordinates (HSE;VSO) in [nT]; position of S/C in meaningful coordinate system, 1 Hz.

• Resampled Calibrated data (level 4) • Space magnetic field data in physically meaningful coordinates (HSE, VSO) in [nT]; averaged from space magnetic field data; position of S/C in meaningful coordinate system. Resolution lower than 1Hz. ARCHIVE SPICAV

• Observational Geometry • Stellar occultation • Solar occultation • Limb • Nadir • IR channel • Raw data • Corrected and partly calibrated • UV channel • Raw data • Corrected and partly calibrated ARCHIVE SPICAV-SOIR

• Solar occultation data:

• Level 2, Raw data, corrected for detector non-linearity • Level 3, Calibrated in wavenumber ARCHIVE VIRTIS

• Combined datasets, data cubes, containing level 2 & 3 and geometry data in each set.

• Level 2 data: raw data in DN, derived from telemetry with decompression, quality checked, time ordered, and sorted by channel/ FPA. This includes both observations and flight calibrations. • Geometry data: including coordinates and viewing angles for all observing sessions on a pixel basis. There is a one-to-one correspondence with the observation data files for Venus. • Level 3 data: calibrated data in DN. There is a one-to-one correspondence with the observation raw data files when data quality permits. Calibrated dark current files are also available separately for VIRTIS-H. ARCHIVE VMC

• Level 3 data • The VMC team delivers only radiometrically calibrated data as special calibration is required to process raw data. ARCHIVE VeRA

• Observation types include: • Occultations - Atmospheric profiles; Ionospheric profiles • Gravity - LOS accelerations • Bistatic radar - dielectric constant; surface roughness • Solar Corona - Doppler or phase time series • RAW data only (Doppler data), Closed loop data only • Higher level data and Open loop data available directly from PI after special agreement. Long Term Planning posters VEX Science Data Total volume 5.1 Tbit PSA content

• 1.8 Tbit total for ASPERA-4 • 0.5 Tbit total for MAG • 0.5 Tbit total for SPICAV • 0.05 Tbit total for SPICAV-SOIR • 0.002 Tbit total for VeRA • 5.1 Tbit total for VIRTIS • 2.9 Tbit total for VMC

VEX PSA total 11 Tbit PSA total 42 Tbit (Nov 2016) VEX Archive, missing items

• Radio Science data from occcultations are complete up to July 2012 only • Accelerometer data from 13 atmospheric drag campaigns still to be ingested • Complete data from campaign in June-July 2014 still to be ingested • Final review completed for all investigations, but a few updates of documentation is still missing • These missing items are expected to have been completed in the first half of 2017. Major publications

1. Over 500 refereed publications related to results 2. Planetary & Space Science, double issue on Venus Express (2006-07) 3. Special section of Nature (2007) 4. Planetary & Space Science, special issue on coordinated ground and space based observation campaign (2008) 5. Journal of Geophysical Research, special issue on Venus Express (2009) 6. Planetary & Space Science, special issue on comparative planetology (2010) 7. Icarus, special issue on Venus (2012) 8. ISSI Book “Towards understanding the climate of Venus” (2012) 9. Planetary & Space Science, special issue on Exploration of Venus (2015) 10. Venus III book (in progress)

PSA access via http://www.cosmos.esa.int/web/psa questions to Emmanuel Grotheer [email protected]