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Concurrent Operation of Two Over-the-Horizon Radars
2007
IEEE Journal on Selected Topics in Signal Processing
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In this paper, we consider concurrent operations of two OTHR systems that occupy the same frequency band with different chirp waveforms. ...
surveillance at long range well beyond the limit of the horizon of conventional line-of-sight (LOS) radars. ...
ACKNOWLEDGMENT The authors would like to thank the insightful discussion by Dr. G. Wang. They also wish to thank the anonymous reviewers for their helpful comments on earlier versions of this paper. ...
doi:10.1109/jstsp.2007.897054
fatcat:ly6hvvcgnbe5xnc46zqghabmai
Over-the-horizon radar surveillance sensor fusion for enhanced coordinate registration
1999
1999 Information, Decision and Control. Data and Information Fusion Symposium, Signal Processing and Communications Symposium and Decision and Control Symposium. Proceedings (Cat. No.99EX251)
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In operational systems, targets are tracked by multiple over-thehorizon radars in overlapping coverage areas. In this paper, we consider the case of two over-the-horizon radars. ...
Systematic positional differences between tracks from the separate radars can be used to improve the estimation of ionospheric heights. ...
In operational systems, targets are tracked by multiple OTHR systems in overlapping coverage areas. In this paper, we will consider the case of two overlapping OTH radars. ...
doi:10.1109/idc.1999.754160
fatcat:hlm2ewnscve77ptxxxesg7fbdq
An application of generalized least squares bias estimation for over-the-horizon radar coordinate registration
2000
Proceedings of the Third International Conference on Information Fusion
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Target and sensor geometry for a particular suite of over-the-horizon radars and a single target are given. ...
In this paper a description of over-the-horizon radar propagation is provided and a method, given the target/sensor geometry, is described for estimating the range and azimuth biases resulting from errors ...
McMichael of CSIRO (formerly CSSIP) for supplying the initial code for the GLSE analysis. ...
doi:10.1109/ific.2000.862679
fatcat:6h6lrcjtpnczvci2oez6xwrjt4
Smart gateways switching control algorithms based on tropospheric propagation forecasts
2017
International Journal of Satellite Communications And Networking
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time for the triggering of the switches. ...
The use Q/V band spectrum for the feeder links of high throughput satellites and the need to cope with the significant propagation impairments at those frequencies motivate the development of smart diversity ...
Acknowledgment The authors would like to thank CNES for funding the activity in the framework of the contract "CNES R-S13/TC-0005-043". ...
doi:10.1002/sat.1233
fatcat:5diu5vwmwffxrnlmaepzvd2dhi
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates
2015
Journal of Glaciology
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We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica. ...
The radar is capable of mapping interfaces with reflection coefficients as low as −80 dB near the firn–ice transition and as low as −64 dB at depths of 600 m. ...
Collins in editing and formatting the manuscript. ...
doi:10.3189/2015jog14j089
fatcat:j6z2qrcyc5fq7hdzjgaxo74gsa
Observationally constrained surface mass balance of Larsen C Ice Shelf, Antarctica
2017
The Cryosphere Discussions
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We propose that this horizon was formed in a single melt season over the ice shelf. ...
Analysis of ground-penetrating radar from several field campaigns allows for a longer-term perspective of spatial SMB: a particularly strong and coherent reflection horizon below 25–44 m w.e. ...
We also acknowledge the generous contribution of faculty, staff, and students at CReSIS in collecting and processing the Ku-band data as well as NASA's Operation IceBridge team in collecting and disseminating ...
doi:10.5194/tc-2017-44
fatcat:6iemr6qc2zfanbzfwz3docnwti
Observationally constrained surface mass balance of Larsen C ice shelf, Antarctica
2017
The Cryosphere
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Combining snow height observations, ground and airborne radar, and SMB output from a regional climate model yields a gridded estimate of SMB over the LCIS. ...
Combining several geophysical techniques, we reconstruct spatial and temporal patterns of SMB over the LCIS. ...
We also acknowledge the generous contribution of faculty, staff, and students at CReSIS in collecting and processing the Ku-band data as well as NASA's Operation IceBridge team in collecting and disseminating ...
doi:10.5194/tc-11-2411-2017
fatcat:vp7434h75ncsvoktu3b4stbfey
A test of ocean surface-current mapping with over-the-horizon radar
1998
IEEE Transactions on Geoscience and Remote Sensing
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A two-day test with a decametric over-the-horizon (OTH or ionospheric) radar in Virginia attempted to map the radial component of ocean surface currents over a 210 000km 2 area that includes the Florida ...
Concurrent sea-surface topography in the Gulf of Mexico, derived using tandem altimetric observations from the TOPEX/Poseidon and ERS-1 satellites, confirms that a region where the OTH radar measures a ...
ACKNOWLEDGMENT The authors thank the U.S. Navy for granting access to its ROTHR system, at no cost to NOAA, and C. Tierney for calculating model tidal currents. ...
doi:10.1109/36.655321
fatcat:rdbwdmf3ozdz5fgzfydhulidoi
The HF surface wave radar WERA. Part I: Statistical analysis of recorded data
2010
2010 IEEE Radar Conference
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Surface wave (SW) over-the-horizon (OTH) radars are not only widely used for ocean remote sensing, but they can also be exploited in integrated maritime surveillance systems. ...
This paper represents the first part of the description of the statistical and spectral analysis performed on sea backscattered signals recorded by the oceanographic WEllen RAdar (WERA) system. ...
This paper deals with the statistical analysis of sea clutter using signals received by two concurrently operating WERA systems. ...
doi:10.1109/radar.2010.5494505
fatcat:67lezgwz7velzctd6klp6acv4a
Snow accumulation and compaction derived from GPR data near Ross Island, Antarctica
2011
The Cryosphere
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Compaction of snow between 2 m and 13 m depth is estimated at both sites by tracking several internal reflection horizons along the radar profiles and calculating the average change in separation of horizon ...
At two measurement sites near Scott Base, Antarctica, we extrapolate point measurements of average accumulation from snow pits and firn cores to a larger area by identifying a dateable dust layer horizon ...
The participation of Mette Riger-Kusk in the field work in 2008 is greatly acknowledged. ...
doi:10.5194/tc-5-391-2011
fatcat:4sq3x4rqwjddjaiketeczpz3fy
Snow accumulation and compaction derived from GPR data near Ross Island, Antarctica
2011
The Cryosphere Discussions
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Compaction of snow between 2 m and 13 m depth is estimated at both sites by tracking several internal reflection horizons along the radar profiles and calculating the average change in separation of horizon ...
At two measurement sites near Scott Base, Antarctica, we extrapolate point measurements of average accumulation from snow pits and firn cores to a larger area by identifying a dateable dust layer horizon ...
The participation of Mette Riger-Kusk in the field work in 2008 is greatly acknowledged. ...
doi:10.5194/tcd-5-1-2011
fatcat:uccmoio7lnd4posnvpjygve3ki
Radar Observation of Wind Farms in Various Weather Conditions
2020
TransNav: International Journal on Marine Navigation and Safety of Sea Transportation
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[5] In the case of a radar operating in X band there is 100% likelihood of detecting a wind farm at a distance of 5 Nm, however, the distance grows to 10 Nm for a radar operating in S band. ...
is reflected by a smaller and smaller fragment of the windmill, and for the radar under research the distance to the radar horizon equals approximately 10 NM. ...
doi:10.12716/1001.14.02.07
fatcat:42q7lwnnkvbfnccxhryp3ggy3a
How US Air Force Space Command Optimizes Long-Term Investment in Space Systems
2003
Interfaces
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The space systems in orbit must continually meet defensive and offensive requirements and remain interoperable over time. ...
Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. ...
We acknowledge the contributions made by US Air Force officers: Colonel Tom Clark, Captain Angela Giddings, Lt. Col. Lee Lehmkuhl, Lt. Col. Lynnette Whitsel, and Lt. Col. Kirk Yost. ...
doi:10.1287/inte.33.4.1.16369
fatcat:eajebhfutjajhnmf2ww7am745a
Strong spatial variability of snow accumulation observed with helicopter-borne GPR on two adjacent Alpine glaciers
2006
Geophysical Research Letters
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H.M. was funded by the grant 21-105214/1 of the Schweizer Nationalfonds, O.E. was supported through an ''Emmy Noether''scholarship EI 672/1 of the Deutsche Forschungsgemeinschaft. ...
The layer is visible in the radar profile as a long, massive and smooth reflection horizon at a depth of 0.5 to 1 m. ...
were dug down to the horizon of the previous autumn's snow surface. ...
doi:10.1029/2006gl026576
fatcat:66fq3vylurbippismnk3auxy2i
RSS-Net: Weakly-Supervised Multi-Class Semantic Segmentation with FMCW Radar
[article]
2020
arXiv
pre-print
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We advocate radar over the traditional sensors used for this task as it operates at longer ranges and is substantially more robust to adverse weather and illumination conditions. ...
for the radar stream by incorporating four camera and two LiDAR streams. ...
The offline datasets we use contain concurrent RGB image streams covering the full azimuth range (four cameras with 360°horizontal field-of-view), LiDAR scans from two lasers, and radar scans.
A. ...
arXiv:2004.03451v1
fatcat:oonp3oek6nhvxlgzgegb3tsumm
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