DBNet

DBNet

For background on the DBNet project, see the WMO DBNet page.

The aim of DBNet is to provide near real-time access to near-global data from Low Earth Orbit (LEO) satellites, in order to meet in a cost-efficient manner the timeliness requirements of regional and global Numerical Weather Prediction (NWP) and other applications.

When satellites have a Direct Broadcast capability, which is the case of most LEO meteorological satellites, an alternative data access route is the acquisition of the Direct Broadcast data stream at a local ground station, which allows real-time acquisition, albeit with coverage limited to the portion of orbit within the area of visibility of the local station.

The Direct Broadcast Network for Near Real-Time Relay of LEO satellite data (DBNet) overcomes this limitation in offering a cost-efficient trade-off between coverage and timeliness. It coordinates data acquisition through a globally distributed network of local Direct Broadcast receiving stations, their processing in accordance with agreed standards, and their rapid delivery to the global user community through appropriate telecommunication systems.

Source: Guide to the Direct Broadcast Network, WMO

The NWP SAF routinely checks the quality of DBNet data and their consistency with globally received data. It is important for NWP centres to be assured of the high quality of the DBNet data so they can take advantage of the timeliness (within 30 min, compared to 1.5-7 hours for global data). DBNet data is used in both global models and regional models. It is particularly valuable for the regional models, which often have tight time constraints.

The DBNet software at all stations (except NOAA-operated EARS-ATOVS stations) is based on AAPP, an NWP SAF software package.

Currently, the NWP SAF monitors DBNet reception of the following instruments:

  • ATOVS
  • IASI
  • ATMS
  • CrIS
  • IRAS
  • MWHS-2

Some external web sites providing information and monitoring facilities relevant to DBNet:
JMA Asia-Pacific RARS monitoring
Meteo-France observation monitoring
ECMWF observation monitoring
Australian Bureau of Meteorology
KMA DBNet information
EUMETSAT EARS services