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Near Field Characterization of the GeoSTAR Demonstrator
2006
2006 IEEE International Symposium on Geoscience and Remote Sensing
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The GeoSTAR demonstrator can be characterized at close range by means of a simple near-to-far-field phase correction. This reduces the test set-up configuration to reasonable dimensions. ...
This work presents the details of the near-to-far-field correction as well as some preliminary results that confirm its suitability to characterize the demonstrator. ...
Some preliminary indoor experiments have confirmed the suitability of near field test to characterize the demonstrator ACKNOWLEDGMENT This work has been carried out at the Jet Propulsion Laboratory, California ...
doi:10.1109/igarss.2006.654
dblp:conf/igarss/TannerLGT06
fatcat:lszepen5zrhgljwfwgflvh44yy
Field tests of the GeoSTAR demonstrator instrument
2007
2007 IEEE International Geoscience and Remote Sensing Symposium
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Ground based tests of the GeoSTAR (geostationary synthetic thinned array radiometer) demonstrator instrument are reported which simulate the view of the earth from geosynchronous earth orbit (GEO). ...
GeoSTAR calibration. ...
In the Summer of 2006, we found a suitable solution by re-focusing GeoSTAR to operate in the near field [2] . ...
doi:10.1109/igarss.2007.4423332
dblp:conf/igarss/TannerBGLLRT07
fatcat:bmrlqhodzzaoxkmu2hsytij24e
GeoSTAR: a synthetic aperture microwave sounder for geostationary missions
2005
Enabling Sensor and Platform Technologies for Spaceborne Remote Sensing
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To that purpose a small ground based demo version of GeoSTAR is being constructed, which wiIl be used to characterize system performance and test various calibration methods. ...
In particular, the feasibility of incorporating GeoSTAR on the next generation of the geostationary weather satellites, GOES-R, is being closely examined. ...
These can be used to provide absolute radiometric calibration of GeoSTAR. Finally, when the Sun transits near the Earth, it will be aliased into the field of view in a fully predictable manner. ...
doi:10.1117/12.578967
fatcat:lyh5igccpvanhnp75tptrw5jz4
Progress in developing GeoSTAR: a microwave sounder for GOES-R
2005
Earth Observing Systems X
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The technology and system design required for GeoSTAR are rapidly maturing, and it is expected that a space demonstration mission can be developed before the first GOES-R launch. ...
The initial space version of GeoSTAR will have performance characteristics equal to those of the AMSU system currently operating on polar orbiting environmental satellites, but subsequent versions will ...
Sun measurements: One neighboring receiver pair near the center of the array
Fig. 11 . 11 GeoSTAR images of solar transit (times are in PDT) Fig. 12. ...
doi:10.1117/12.615269
fatcat:vei5z5celvd3bed7lmjelpssgu
Initial Results of the Geostationary Synthetic Thinned Array Radiometer (GeoSTAR) Demonstrator Instrument
2007
IEEE Transactions on Geoscience and Remote Sensing
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The instrument consists of a fixed 24-element array of correlation interferometers and is capable of producing calibrated images with 1 • spatial resolution within a 17 • wide field of view. ...
The design, error budget, and preliminary test results of a 50-56-GHz synthetic aperture radiometer demonstration system are presented. ...
The first author, A. B. Tanner, would like to thank the coauthors from University of Michigan for a superb data system, S. Seufert and K. ...
doi:10.1109/tgrs.2007.894060
fatcat:nhbulnwjqfbjdbi7av5g6jgu7a
Initial Results of the Geosynchronous Synthetic Thinned Array Radiometer (GeoSTAR)
2006
2006 IEEE International Symposium on Geoscience and Remote Sensing
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The design and preliminary test results of a 50-56 GHz synthetic aperture radiometer demonstration system are discussed. ...
spacings at the center of the array, and about 5% and 3 degrees for the majority of the array. ...
ACKNOWLEDGMENT This work has been carried out at the Jet Propulsion Laboratory, California Institute of Technology under a contract with the National Aeronautics and Space Administration. ...
doi:10.1109/igarss.2006.1018
fatcat:mqpp7wnxanhu3mucnd44ks7qji
A Geostationary Microwave Sounder: Design, Implementation and Performance
2021
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
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During the latter half of 2020 a detailed study of GeoSTAR and its projected performance was undertaken as one of several such studies commissioned by NOAA for the purpose of configuring NOAA's next generation ...
GeoSTAR will make measurements every 15 minutes or less instead of every 12 hours and cover a large portion of the Earth continuously instead of snapshots in a narrow swath. ...
Here the overall field of view (FOV) is about 1000 km. This is the so-called "GeoStorm" design. Fig. 4 shows a photo of a 1/3-scale demonstration model developed under the IIP program.
B. ...
doi:10.1109/jstars.2021.3132238
fatcat:cmdlv6cq6nam3dfwrzl5avl3yu
A High-Resolution Full-Earth Disk Model for Evaluating Synthetic Aperture Passive Microwave Observations From GEO
2009
IEEE Transactions on Geoscience and Remote Sensing
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A high-resolution full-Earth disk model has been developed to aid in the design of the instrument and to characterize sensor performance. ...
The model is used as a tool to examine several critical aspects of GeoSTAR performance and design. ...
Scattering should be integrated into the model in order to extend its operation up to the 183-GHz channels of GeoSTAR, in general, and in order to improve the accuracy of the model at 50 GHz near deep ...
doi:10.1109/tgrs.2009.2031172
fatcat:ffdx6rainjhkfnfjto2pxqyuru
Compressive Reflector Antenna Phased Array
[chapter]
2017
Antenna Arrays and Beam-formation
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far-fields of the reflector. ...
In order to increase the sensing capacity of the CRA even further, frequency dispersive metamaterials can be designed to coat the surface of the CRA, which ultimately produces spectral codes in near-and ...
The authors would like to thank Dr. Hipolito Gomez Sousa and Prof. Oscar Rubinos Lopez, from University of Vigo, for their collaboration in the generation of Figure 5 . ...
doi:10.5772/67663
fatcat:zwbthdhihfcghbxkkxaioroxry
The exploration of eastern Mediterranean deep hypersaline anoxic basins with MODUS: a significant example of technology spin-off from the Geostar Program
2006
Annals of Geophysics
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A significant example of technological spin-off from the GEOSTAR project is represented by the special-purpose instrumented module, based on the deep-sea ROV MODUS, which was developed in the framework ...
of the EU-sponsored project BIODEEP. ...
Acknowledgements Authors wish to dedicate this paper to the memory of Giuseppe Smriglio, coordinator of GEOSTAR project, who prematurely died in September 2001. ...
doi:10.4401/ag-3129
doaj:e8e553d801fa4f5db78dfac32243c041
fatcat:pnig37q55zhq5b5fcye64k7iuq
Near Field Imaging of Synthetic Aperture Radiometer
2008
PIERS Online
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The near field applications of synthetic aperture interferometric radiometer (SAIR) are receiving great interest in the recent years. ...
Because the traditional far field Fourier imaging theory can not stand any longer in near field condition, developing the associate imaging theory will be an important objective of SAIR technique. ...
Numerical simulations demonstrate the advantage and feasibility of this method. Figure 1 : 1 Geometry sketch of the far field (a) and near field (b) interferometric measurement. ...
doi:10.2529/piers080901081924
fatcat:lf3cipyckfcdxpr3ebavaaqgue
The lunar radio array (LRA)
2009
UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts IV
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The proposed NRL-JPL effort was to advance this system to a TRL of 6. ...
NRL has had an applied research (6.2) program in which a free-space laser communication system has been demonstrated, with data rates of order 10 Mbps. ...
characterizing the farside radio environment. ...
doi:10.1117/12.827955
fatcat:najaevqqdbapzblyc2uygee62q
A Near-Field Imaging Method Based on the Near-Field Distance for an Aperture Synthesis Radiometer
2024
Remote Sensing
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Simulations of point sources and extended sources in near-field conditions demonstrate the effectiveness of both methods, with F-matrix imaging outperforming near-field G-matrix imaging. ...
The feasibility of both near-field imaging methods is further validated by carrying out experiments on a 10-element Y-array system. ...
The results demonstrate the effectiveness of both methods and show that the F-matrix method provides a better correction to the near-field error. ...
doi:10.3390/rs16050767
fatcat:rylqg5p2nvgvda55xkoegx2oe4
Prototype development of a geostationary synthetic thinned aperture radiometer, GeoSTAR
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004
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The instrument is being developed as a laboratory testbed, and the goal of this work is to demonstrate the technologies needed to do atmospheric soundings with high spatial resolution from Geostationary ...
The error budget defines key requirements, such as null offsets, phase calibration, and antenna pattern knowledge. Details of the instrument design are discussed in the context of these requirements. ...
Fig. 10 : Antenna range tests of horns
CONCLUSIONS The GeoSTAR prototype construction is nearing completion. ...
doi:10.1109/igarss.2004.1368644
dblp:conf/igarss/TannerWKLDPRRGM04
fatcat:2n3n4mxfkjcsbaz4vryqsvfcvy
Prototype development of a geostationary synthetic thinned aperture radiometer (geoSTAR)
IEEE MTT-S International Microwave Symposium Digest, 2005.
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The instrument is being developed as a laboratory testbed, and the goal of this work is to demonstrate the technologies needed to do atmospheric soundings with high spatial resolution from Geostationary ...
The error budget defines key requirements, such as null offsets, phase calibration, and antenna pattern knowledge. Details of the instrument design are discussed in the context of these requirements. ...
Fig. 10 : Antenna range tests of horns
CONCLUSIONS The GeoSTAR prototype construction is nearing completion. ...
doi:10.1109/mwsym.2005.1517155
fatcat:smtbjurkwjatnhnbso6v37usbm
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