Engineering topics
Rodriguez, E.
Publications and source records attributed to Rodriguez, E..
A real-time algorithm for radar interferometry of ocean surface height
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Ionosphere effects on SAR performance at UHF and VHF frequencies
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Microwave Observatory of Subcanopy and Subsurface (MOSS): a low frequency radar for global deep soil moisture measurements
In this paper, a low-frequency UHF/VHF radar mission concept is presented and technology challenges to implement it are discussed. This mission concept is currently being studied under a NASA/ESTO instrument incubator program project. The progress of several aspects of the project are discussed.
Wide-swath altimetric measurement of ocean surface topography
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Latest advances in the Microwave Observatory of Subcanopy and Subsurface (MOSS) project
In this paper, a low-frequency UHF/VHF radar mission concept is presented and technology challenges to implement it are discussed.
A millimeter-wave phased array radar for hazard detection and avoidance on planetary landers
In this paper, we describe the overall system design for a radar being developed for the NASA Mars Science Laboratory, set to launch in 2009.
A dual-low-frequency radar for sub-canopy and deep soil-moisture measurements
Measurements of deep and sub-canopy soil moisture are critical in understanding the global water and carbon energy cycle, but are not presently available on a synoptic basis. In this paper, we discuss a proposed spaceborne dual-frequency (UHF and VHF) radar that can provide global & these key measurements. This system is polarimetric and the low transmit frequencies chosen for their penetration abilities necessitate a large antenna that has an aperture of approximately 30m by 11m at VHF, and 30m by 3m at UHF. We describe the mission concept, overall system design and performance characteristics, and discuss ongoing tasks to prototype key system components, and verify the retrieval algorithms. We are also developing a tower-based prototype radar system. This system will, through field observations, demonstrate the scientific effectiveness of the measurement concept and provide critical data for algorithm development. We provide details of the ground experimentation including issues unique to operating at the low-frequencies chosen for these systems.
Vegetation parameters using TOPSAR and GeoSAR sensors
This paper will present quantitative results of vegetation parameter extraction using interferometric data collected using the TOPSAR and GeoSAR mapping instruments.
High-powered Radar Sounders for the Investigation of Jupiter's Icy Moons
This talk will address the main drivers in the design of a radar sounder for the JIMO mission and provide a potential solution that will optimize the chances of success in the detection of ice/water interface and sub-surface stratigraphy.
Dual-low frequency radar for soil moisture under vegetation at at-depth
To address a key science research topic for the global water and energy cycle, namely measuring soil moisture under substantial vegetation canopies and to useful depths, we have developed a concept for a synthetic aperture radar (SAR) system operating simultaneously at UHF and VHF frequencies. We are currently prototyping key technology items that enable this concept under the NASA Earth Science Technology Office (ESTO) Instrument Incubator Program (IIP). This presentation describes the technological challenges and innovations we are addressing to enable the implementation of this instrument and its integration into a future Earth-orbiting mission.
Measurement of aerodynamic roughness length to interferometric SAR measurements
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