Envisat DORIS Precise Orbit State Vectors [DOR.VOR_AX]

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 (https://earth.esa.int/eogateway/documents/20142/37627/Readme-file-for-Envisat-DORIS-POD.pdf/e94f32f0-3776-788b-abaf-3901ad26440c) for Envisat DORIS Precise Orbit Determination files. https://earth.esa.int/eogateway/documents/20142/1565579/DOR-VOR-AX-Description.png