The processing of hexagonally sampled signals with standard rectangular techniques: application to 2d large aperture synthesis interferometric radiometers
In Earth observation programs there is a need of passive low frequency (L-band) measurements to monitor soil moisture and ocean salinity with high spatial resolution 10-20 km, a radiometric resolution of 1 K and a revisit time of 1-3 days. Compared to total power radiometers aperture synthesis inter...
| Authors: | ; ; ; |
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| Format: | Article |
| Publication date: | 1997 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/97879 |
| Online Access: | https://hdl.handle.net/2117/97879 https://dx.doi.org/10.1109/36.551946 |
| Access Level: | Open access |
| Keyword: | Telecommunication Fast fourier transforms Oceanographic techniques rRemote sensing Radiometry Uhf measurement Hydrological techniques Geophysical techniques Soil Moisture measurement Geophysical signal processing Telecomunicació Àrees temàtiques de la UPC::Enginyeria de la telecomunicació |
| Summary: | In Earth observation programs there is a need of passive low frequency (L-band) measurements to monitor soil moisture and ocean salinity with high spatial resolution 10-20 km, a radiometric resolution of 1 K and a revisit time of 1-3 days. Compared to total power radiometers aperture synthesis interferometric radiometers are technologically attractive because of their reduced mass and hardware requirements. In this field it should be mentioned the one-dimensional (1D) linear interferometer ESTAR developed by NASA and MIRAS a two-dimensional (2D) Y-shaped interferometer currently under study by European Space Agency (ESA). Interferometer radiometers measure the correlation between pairs of nondirective antennas. Each complex correlation is a sample of the |
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