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The Lunar Mini-RF Radars: Hybrid Polarimetric Architecture and Initial Results
2011
Proceedings of the IEEE
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| The two mini-radio-frequency (mini-RF) radars flown in near-polar lunar orbits (on Chandrayaan-1 and the Lunar Reconnaissance Orbiter) were the first of their kind, hybrid-polarimetric. ...
Data quality and instrument characteristics suggest that hybrid polarity is highly desirable for future exploratory radar missions in the Solar system. ...
.: The Lunar Mini-RF Radars: Hybrid Polarimetric Architecture and Initial Results
Fig. 7 . 7 Comparison of TWTA and MPM technologies. ...
doi:10.1109/jproc.2010.2084970
fatcat:buwkgli7nzbklalri7zd3vn4wy
Initial observations of lunar impact melts and ejecta flows with the Mini-RF radar
2012
Journal of Geophysical Research
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Winters (2011), 581 The Lunar Mini-RF Radars: Hybrid Polarimetric Architecture and Initial Results, Proc IEEE, 582 99, doi: 10.1109/JPROC.2010.2084970, 808-823. 583 584 Robinson, M. ...
of Mini-RF, and are mapped to the lunar coordinate grid with a 132 resolution of 15 m/pixel. ...
doi:10.1029/2011je003911
fatcat:b33weovrercvhgzonle2iea7c4
Hybrid Dual-Polarization Synthetic Aperture Radar
2019
Remote Sensing
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Hybrid dual-polarimetric imaging radars were in the payloads of two lunar-orbiting satellites, India's Earth-observing RISAT-1, and Japan's ALOS-2. ...
The results verify that the performance accuracy of the HCP architecture is comparable to the accuracy delivered by a quadrature-polarized SAR. ...
Figure 1 . 1 Examples of lunar impact crater polarimetric images as seen from the Arecibo Observatory (a) and an m-chi classification of hybrid dual-polarized data (b) from the Mini-RF radar aboard LRO ...
doi:10.3390/rs11131521
fatcat:7a37rhoudvgifhdemga5fpfbby
Antenna Cross-Polarization Isolation and Calibration of Hybrid-Polarization Radars
2013
IEEE Antennas and Wireless Propagation Letters
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Experimental results show the validity of the radar model and antenna measurement technique. ...
This letter presents an experiment using a fully polarimetric hybrid-polarization (CL-pol) radar that employs separate spiral antennas for transmit of the orthogonal circular polarizations and operates ...
System [3] and polarization decomposition models [6] for prior examples of CL-pol radars, the mini-radio frequency (mini-RF) radars of the Chandrayaan-1, and the Lunar Reconnaissance Orbiter (LRO) ...
doi:10.1109/lawp.2013.2282251
fatcat:vcef6zssljemfnbejzwackfq2u
Unravelling the Mystery of Lunar Anomalous Craters Using Radar and Infrared Observations
2018
Journal of Geophysical Research - Planets
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To resolve this controversy, we have systematically analyzed >4,000 impact craters with diameters between 2.5 and 24 km in the Mini-RF radar image and Diviner rock abundance (RA) map. ...
We first constructed two controlled orthorectified global mosaics using 6,818 tracks of Mini-RF raw data and then analyzed the correlations between radar CPR and surface slope, RA, and depth/diameter ratios ...
The authors gratefully acknowledge NASA PDS Geosciences Node for providing Mini-RF, Diviner RA, and LOLA topography data. ...
doi:10.1029/2018je005668
fatcat:ezkneie6mze7lc5tdnldbba6we
Chandrayaan-2 Dual-Frequency SAR (DFSAR): Performance Characterization and Initial Results
[article]
2021
arXiv
pre-print
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The resulting data from DFSAR support calculation of the 2×2 complex scattering matrix for each resolution cell, which enables lunar near surface characterization in terms of radar polarization properties ...
Our initial results show that craters in both permanently shadowed regions (PSRs) and non-PSRs that are classified as Circular Polarization Ratio (CPR)-anomalous in previous S-band radar analyses appear ...
, qualification and operations. ...
arXiv:2104.14259v1
fatcat:56gr3uvhvzagtbnvm652id3sy4
Impact Ejecta Characterization for Small-Sized Fresh and Degraded Lunar Craters Using Radar Data
2016
Current Science
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Using data from Mini RF instrument on-board NASA's Lunar Reconnaissance Orbiter, four Stokes parameters that differentiate and describe the observed backscattered electromagnetic field are calculated. ...
We use the first Stokes parameter to investigate and estimate the spatial ejecta distribution for 98 small-sized fresh and degraded craters from mare and highland regions. ...
Ejecta extent measurements Mini-RF on-board LRO utilizes new wideband hybrid polarization architecture to measure Stokes parameters of the reflected signal 22 . ...
doi:10.18520/cs/v110/i10/1929-1938
fatcat:qy4hyn4puvh23eoebqiyirqwb4
Evidence for water ice on the Moon: Results for anomalous polar craters from the LRO Mini-RF imaging radar
2013
Journal of Geophysical Research - Planets
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1] The Mini-RF radar instrument on the Lunar Reconnaissance Orbiter spacecraft mapped both lunar poles in two different RF wavelengths (complete mapping at 12.6 cm S-band and partial mapping at 4.2 cm ...
D., et al. (2013), Evidence for water ice on the Moon: Results for anomalous polar craters from the LRO Mini-RF imaging radar, ...
Crusan) for initially funding the Mini-RF project and for critical support at several points in our long journey back to the Moon. ...
doi:10.1002/jgre.20156
fatcat:aixcnll4zjacpenuddfillub5u
Geologic Studies of Planetary Surfaces Using Radar Polarimetric Imaging
2011
Proceedings of the IEEE
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Recent polarimetric imaging using Arecibo has included Venus and the Moon. ...
For example, polarimetric radar studies of volcanic settings on Venus, the Moon, and Earth display some similarities, but also illustrate a variety of different emplacement and erosion mechanisms. ...
Acknowledgment The authors would like to thank the staff of the Arecibo and Green Bank Observatories for their help with the observations discussed in this paper. Three anonymous reviewers and N. J. ...
doi:10.1109/jproc.2010.2099090
fatcat:sgu25reywfc2jas5vum34xjgce
Polarimetric Portraits
2021
Earth and Space Science
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The suggested terminology is applicable to a variety of disciplines, including radiometry, alternative polarimetric radar architectures, radar astronomy, weather radar, and GPS/GNSS reflectometry. ...
Polarimetric portraits obtained by dual-polarized and quadrature-polarized radars are shown to be equal. RANEY ...
The LRO's Mini-RF in orbit at the Moon received signals reflected from the lunar surface in response to circularly polarized transmissions from Arecibo, Puerto Rico. ...
doi:10.1029/2021ea001768
fatcat:6kslbaupp5bnvhq223lbgw4wgu
EVALUATION OF HYBRID POLARIMETRIC DECOMPOSITION TECHNIQUES FOR WINTER CROP DISCRIMINATION
2017
Progress In Electromagnetics Research M
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In this paper we compare, using ISRO's RISAT-1 FRS-1 mode Compact Polarimetric (CL-Pol) data, two widely used hybrid polarimetric decomposition techniques, m − δ and m − χ decompositions, with regard to ...
We show that the classification based on the m − χ decomposition results in better crop separability in general. ...
ACKNOWLEDGMENT This work is carried out with the data from RISAT data Utilization programme and authors are grateful to Dr. Manab Chakraborty, Project Director, RISAT-UP. ...
doi:10.2528/pierm17011603
fatcat:ybdaqln55jhnnmbpsvdvocobcy
Hybrid Compact Polarimetric SAR for Environmental Monitoring with the RADARSAT Constellation Mission
2020
Remote Sensing
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The primary image data products from an HCP radar are different from those of a traditional polarimetric radar. ...
Thus, HCP data can be considered as dual-pol data, while the resulting polarimetric classifications of features in an observed scene are of comparable accuracy as those derived from the traditional fully ...
Acknowledgments: The authors would like to thank Francois Charbonneau for a critical review that helped improve the manuscript and Keith Raney for many helpful inputs, comments and reviews. ...
doi:10.3390/rs12203283
fatcat:brqrgjbvwnbm7pe7qxwk6j77ba
LRO observations of morphology and surface roughness of volcanic cones and lobate lava flows in the Marius Hills
2013
Journal of Geophysical Research - Planets
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Comparisons between LROC NAC block populations, Mini-RF data, and Diviner-derived rock abundances confirm that blocky lava flows comprise the domes of the Marius Hills. 8 mm features measured by Diviner ...
1] The volcanic domes, cones, sinuous rilles, and pyroclastic deposits of the Marius Hills region of the Moon (~13.4 N, 304.6 E) represent a significant episode of magmatic activity at or near the lunar ...
The hard work and dedication of the LROC Science Operations Center team are gratefully acknowledged. This work was funded by the NASA Lunar Reconnaissance Orbiter project. ...
doi:10.1002/jgre.20060
fatcat:5yeg5f6tpjegxhw64usqmbd464
Hybrid Compact Polarimetric SAR Calibration Considering the Amplitude and Phase Coefficients Inconsistency
2022
Remote Sensing
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Calibration using corner reflectors is an effective way to estimate the distortion parameters of hybrid compact polarimetric (HCP) synthetic aperture radar (SAR) systems. ...
Simulation results show that both schemes can eliminate the influence of the inconsistency of amplitude and phase coefficients, and estimate distortion parameters accurately. ...
polarimetric SAR data. ...
doi:10.3390/rs14020416
fatcat:wodxgtswxfbehojgfk5sacwd4a
Conference Digest
2020
2020 IEEE Aerospace Conference
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The Auxiliary Payload Sensor Suite (APSS), a collection of environmental sensors carried by the Interior exploration using Seismic Investigations, Geodesy, and Heat Transport (InSight) lander, is capable ...
of measuring Martian air temperature, wind speed, atmospheric pressure, and local magnetic fields. ...
The selection will be made in November 2019. The initial MSR architecture called for a hybrid-based propulsion MAV. ...
doi:10.1109/aero47225.2020.9172613
fatcat:ioqf5ijrx5gvffu3ls34aa2nsq
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