Proyectos vigentes

GNSS-R Grazing Altimetry Processing of Dual-Frequency Raw Data acquired by Spire Global Cubesats In-Orbit

Equipo

Earth Observation

Acrónimo

GA-CaPA-IF2FREQ

IP

Estel Cardellach

Resumen

This projects aims at investigating the potential use of dual-frequency combinations (widelane) to expand the coherence conditions of sea surface scattered GNSS signals at grazing geometries. Here, grazing angle is understood as scattering incidence angles between 70⁰ and 85⁰ (5⁰ to 20⁰ elevation angle). Dedicated sequences of GNSS signals, down-converted into Intermediate Frequency and sampled without any further processing are collected from the GNSS receivers aboard Spire GNSS RO constellation, simultaneously to Sentinel-3 radar altimeters. The signals are then processed in software receivers at our group, attempting different solutions of dual frequency combinations.

Actividades del proyecto

To find out potential co-locations between grazing angle GNSS-R tracks as viewed from the Spire constellation of LEOs and Sentinel-3. Order the acquisition by Spire, using the 'raw IF mode'. Once the data arrives at our institute, we run software receivers, first independently on each frequency channel, then modified versions to attempt low-level widelane combinations. Investigate the potential expansion of the coherence conditions using these processing techniques.

Fecha inicio

04/11/2019

Fecha finalización

29/12/2020

Organismo financiador

ESA

Cuantía