The project ERS/Envisat MWR Recalibration and Water Vapour Thematic Data Record Generation (EMiR) is being funded by the European Space Agency (ESA) as part of its Long Term Data Preservation (LTDP) activities.

LTDP EMiR has the following objectives:

  • To generate a fundamental data record (FDR) of top-of-atmosphere brightness temperatures from the MWR series of instruments flown of the platforms ERS-1, ERS-2, and Envisat.
  • To generate a thematic data record (TDR) of the total column water vapour (TCWV) above the world’s ice-free oceans covering the period from 10/1992 to 04/2012.
  • To compare the newly derived TCWV TDR with other long term data sets on TCWV through the GEWEX  water vapour assessment  (GVAP).
  • To assess the impact of improved TCWV information from MWR on the accuracy of ocean altimetry observations from ERS-1, ERS-2, and Envisat.
  • To provide guidance for the next generation of MWR instruments flown onboard the Sentinel-3 series of satellites.

This website provides background information on the LTDP EMiR project and gives access to all relevant project results.

Information on the overarching structure into which LTDP EMIR is embedded are found on the Sensor Performance, Products, and Algorithm (SPPA) web pages run by ESA. More specifically, LTDP EMiR is part of the (multi-)sensor activities focusing primarily on the generation of Fundamental Data Records (FDR).

[Last edited: 2018-06-14]