Envisat DORIS Precise Orbit [DOR_VOR_AX]

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Description

The latest version of the Envisat DORIS Precise Orbit product (DOR_VOR_AX) was generated by the Centre de Traitement Doris Poseidon (CTDP) using the Geophysical Data Records F standards (GDR-F). The product is used to obtain the satellite orbital parameters (latitude, longitude, height and height rate) by using orbit computation routines.

The most significant changes related to the GDR-F standards concern the new ocean tide model (FES2014) and the updated Terrestrial Reference Frame (ITRF2014). The new standards significantly improve all Precise Orbit Determination (POD) metrics with respect to GDR-E: the mean difference and variance of Sea Surface Height (SSH) at crossovers is slightly reduced.

The DOR_VOR_AX product adopts the Envisat format, and the size is 0.2 Mbytes per orbit.

Users are recommended to apply the GDR-F version, but the previous datasets are still available (i.e. GDR-D and GDR-E versions).

See further details in the readme file for Envisat DORIS Precise Orbit Determination files.

DOR-VOR-AX-Description
Comparison of Envisat Sea Level Anomaly trends obtained using DORIS Precise Orbit GDR-E and F standards. North/South patterns are evident. Credits: CNES/CLS.

Details

DATA SET SPECIFICATIONS

Digital Object Identifier (DOI):

Spatial coverage: 
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-04-09 - 2012-04-08
Date of launch:
2002-03-01
Operators:
ESA
Mission status:
completed
Orbit height:
800 km
Orbit type:
Sun-synchronous
Swath width:
5 - 1150 km

PROCESSING LEVEL

level 1

APPLICABLE TERMS & CONDITIONS

Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions

READ T&C

blue arrow DATA CITATION

European Space Agency, 2021, Envisat Precise Orbit product - GDR version F.

RESOURCES

DORIS Products Specifications
Product Specifications
DOR_VOR_AX GDR-F Reprocessing – Technical Documentation
Product Information
DOR_VOR_AX File Structure
Product Specifications
More DORIS Documents
Product Specifications
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