One hour Forecast TEC Map, Global

Latest Data

Latest Data

Product Description

Product Description

DLR's global total electron content (TEC) forecast maps provide information about an one hour vertical TEC (VTEC) forecast at a shell-height of 400 km at global scale. The one hour forecast is calculated as a sum of the actual global TEC maps and a weighted sum of temporal TEC gradient of the previous hour and the temporal gradient of the previous day at the same time. Consequently the forecast maps are based on GPS data acquired from different providers in real-time via the German Federal Agency for Cartography and Geodesy in Frankfurt. The one hour forecast is provided every 15 min as a VTEC matrix with an ionospheric grid point spacing of 2.5° latitude x 5° longitude in ASCII format. 

Product Specification

Specification  Description
External parties German Federal Agency for Cartography and Geodesy, data providers below
Data providers IGS, Greenland network of the Technical University of Denmark
Input data GPS dual-frequency measurements
Input sampling rates 1 s
Reliability of data source Data is preprocessed by DLR including e.g. cycle slip detection
Region of sensors Global
Sensors cf. station list
Single layer shell height 400 km
Spatial resolution 2.5° Latitude x 5° Longitude
Boundaries of grid 90°S - 90°N, 180°W - 180°E
Temporal resolution 15 min
Time information UTC Time
Reference coordinate system ECEF coordinate system with WGS84 reference ellipsoid
Algorithms The one hour forecast is calculated as a sum of the actual global TEC map and a weighted sum of the temporal TEC gradient of the previous hour and the temporal gradient of the previous day at the same time.
File Format ASCII
ASCII file format

Header line containing: unit of TEC values, UTC time, minimum latitude in degree, maximum latitude in degree, minimum longitude in degree, maximum longitude in degree, latitude step width in degree, longitude step width in degree, size of data matrix.

Data matrix with VTEC values in TECU (1e+16 electrons/m²): Upper left corner value represents the minimum longitude and maximum latitude; the lower right corner value represents the maximum longitude and minimum latitude value

 

 

 

Quality Information

Quality Information

  • Error of the Forecast TEC map for Europe provided one hour ago. It is derived from deviations to NRT TEC maps.

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[quicklook]IMPC-thumbnail_TEC-GB-FC.png2024-05-26 05:00 27Kquicklook