# Presentation: 733346

## The Aura Validation Data Center

- B. R. Bojkov and M. R. Schoeberl
*NASA Goddard Space Flight Center*

## What is the AVDC?

- AVDC established to support the validation of Aura
- HIRDLS, MLS, OMI and TES
- Archive for Aura validation datasets
- Groundbased network data
- Aircraft missions and large balloon campaigns
- Other satellite datasets
- Aura instrument data in support of validation
- Station overpass and geographical subsetting
- Instrument FOVs: collocation tools and 15-day predictions
- Support validation field deployments/missions

## Implementation

- Central facility at NASA GSFC
- http://avdc.gsfc.nasa.gov/
- 6-CPU Xserve cluster, 7TB SAN
- Shortly: 10-CPU, 12TB
- Combination of relational database and flat file tree
- Correlative data requirements
- Follow rigid metadata and nomenclature requirements
- Compliance check on all incoming files (format/metadata)
- Maintains backward compatibility with Envisat Cal/Val

## Status

- Operational since February 10, 2005
- Supporting Aura Validation Experiments since October 2004
- 175+ registered users
- Europe, Asia and North America
- NRAs, OMI AO, and NDSC PIs, validation contributors
- Statistics:
- 1.6+ TB total, 150+ GB of validation data
- 495,000 web hits (~1,800/day)
- 65GB web transfers  (~238MB/day)

## Access

- Access guided by data exchange protocol
- NASA Research Announcement PIs
- Aura instrument Science Team members
- OMI Announcement of Opportunity (AO) PIs
- Special arrangements:
- Network for the Detection of Stratospheric Change (NDSC)
- Specific PIs: MSC, station PIs, etc.
- Satellite teams: NOAA, ACE, OSIRIS

## Tools

- Fully searchable archive
- Archived validation data and Aura datasets
- Aura instrument data subsetting
- Collaborative effort with GES-DAAC
- Aura instrument FOVs
- 15-day FOV predictions
- Actual instrument FOV coincidences
- Data conversion tools (read/write), data formulation, search and automatization tools
- Web portal for validation
- News, meeting proceedings, documentation, etc.

## OMI coincidence with De Bilt

## OMI coincidence with De Bilt

## Data

- Aura datasets
- Instrument subsets (stations, geographic) for validation
- Exclusive access point to provisional Aura data
- Experimental products (for example OMI L3, L2G, TES v4)
- Validation data:
- NASA aircraft/balloon mission data (AVE, INTEX)
- NRA and OMI-AO data
- Satellite data: ACE/MAESTRO, SBUV/2, Odin
- Groundbased network data: CMDL, SHADOZ, MSC

## Data highlights

- Daily Aura subsets:
- 520+ OVP for OMI O3 products
- 30 (going on 700) for OMI NO2
- MLS subsets over NDSC stations
- TES GS online
- Special
- AVE coincidences
- Area requests
- ...
- Contact AVDC

- GB data since Aug. 2005
- 2,215 MWR O3 profiles
- 350+ MWR water vapor profiles
- 4,200+ Brewer days (MSC)
- 692+ NDSC lidar O3 profiles
- 900+ ozonesondes from 36 stations
- ~100 water vapor sondes
- and growing...

## Collaboration

- Close coordination with the NDSC
- Access to preliminary data in NRT
- Collaborative effort in data homogenization
- Coordination with measurement networks
- Provide of sonde launch schedules (Aura OVP)
- NRT availability of preliminary data (MSC, NOAA-CMDL)
- Satellite teams
- ACE mission - dataset availability and field campaign coordination
- NOAA - NRT data release for validation
- Envisat data exchange through OMI AO
- Open to suggestions

## Contact Information

- http://avdc.gsfc.nasa.gov/
- Bojan.Bojkov@gsfc.nasa.gov