ANISAP

ANISAP

The ANISAP project aims at definitely assess the potential of an original concept, called NDSA (Normalized Differential Spectral Attenuation). NDSA is based on the exploitation of the normalized incremental ratio of the spectral attenuation for estimating the atmospheric water vapour content (IWV) and liquid water content (ILW) along microwave paths between two or more LEO satellites, utilizing multi-frequency power measurements in a limb atmospheric geometry.

The project follows other related ESA studies and, in particular, aims at the following objectives:

  1. Assessment of the performance of the NDSA technique with respect to: the impact of the initial dataset from which the spectral sensitivity dependence on IWV is derived, the implications of having to convert IWV to WV and the potential of IWV as an intrinsic variable of interest.
  2. Consolidation of the model for clear-air tropospheric scintillation for the counter-rotating satellites case, and development of a model for the co-rotating satellites case.
  3. Derivation of turbulence parameters from high resolution atmospheric profiles from radiosondes or from other means.
  4. Estimation of the impact of liquid water on the spectral sensitivity measurements and its correction
  5. Evaluation of spectral sensitivity measurement accuracy and development of an end-to-end simulator for the counter-rotating satellites case.
  6. Water vapour and liquid water retrieval for counter-rotating satellites
  7. Water vapour and liquid water retrieval for co-rotating satellites

PUBLICATIONS