NASA’s Crustal Dynamics Data Information System (CDDIS) archives Doppler Orbitography and Radiopositioning by Integrated Satellite (DORIS) products including Earth Orientation Parameters, Coordinates of the TRF Origin, and Ionosphere Products.

Earth Orientation Parameters (EOP)

DOI: 10.5067/DORIS/DORIS_IDSEOP_001

Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Earth Orientation Parameters Time Series Product from the NASA Crustal Dynamics Data Information System (CDDIS). DORIS observations from a global network can be utilized for a variety of products. Analysis Centers (ACs) of the International DORIS Service (IDS) retrieve DORIS data on a regular basis to compute various DORIS products from data generated by the DORIS beacons supporting the IDS network, including the time series of Earth orientation parameters (EOPs). The IDS Analysis Center Coordinator combines these solutions to produce an official IDS EOP product. The EOP time series are available in text format.

IDS Earth orientation parameters (EOP) products are online: https://cddis.nasa.gov/archive/doris/products/eop/

as follows: cccWWwdVV.eop.Z

Coordinates of the TRF Origin

DOI: 10.5067/DORIS/DORIS_IDSGEOC_001

Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Geocenter Time Series Product from the NASA Crustal Dynamics Data Information System (CDDIS). DORIS observations from a global network can be utilized for a variety of products. Analysis Centers (ACs) of the International DORIS Service (IDS) retrieve DORIS data on a regular basis to compute various DORIS products from data generated by the DORIS beacons supporting the IDS network, including the time series of coordinates of the geocenter or the origin of the terrestrial reference frame. The IDS Analysis Center Coordinator combines these solutions to produce an official IDS geocenter product. The geocenter time series are available in text format.

IDS Coordinates of the TRF origin (geocenter) products are online: https://cddis.nasa.gov/archive/doris/products/geoc/

as follows: cccWWwdVV.geoc.Z

Ionosphere Product

DOI: 10.5067/DORIS/DORIS_IDSIONO_001

Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Ionospheric Product from the NASA Crustal Dynamics Data Information System (CDDIS). DORIS observations from a global network can be utilized for a variety of products. Analysis Centers (ACs) of the International DORIS Service (IDS) retrieve DORIS data on a regular basis to compute various DORIS products from data generated by the DORIS beacons supporting the IDS network. These products include ionospheric products providing time derivatives of the Total Electron Content (TEC) obtained from the DORIS doppler data. These DORIS derived ionospheric products are available in text format.

IDS Ionosphere products are online: https://cddis.nasa.gov/archive/doris/products/iono/ssa

in subdirectories by satellite as follows: sssVV.YYDDD.iono.Z