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Topic Area: Remote Sensing

Displaying records 11 to 20 of 31 records.
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11. Comparison of Microwave Black-Body Target Radiometric Measurements
Topic: Remote Sensing
Published: 7/30/2010
Authors: David K Walker, Dazhen Gu, Katherine MacReynolds, Randy Direen, James Paul Randa, Amanda Cox, Derek Anderson Houtz, Robert L Billinger
Abstract: Accurate characterization of the brightness temperature (T_B) of black-body targets used for calibrating microwave remote-sensing radiometers includes many inputs: antenna pattern and loss, target temperature, target emissivity, mechanical alignment, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906078

12. A 350-GHz high-resolution high-sensitivity passive video imaging system
Topic: Remote Sensing
Published: 4/27/2010
Authors: Daniel T Becker, James A Beall, Hsiao-Mei Cho, William Duncan, Kent D Irwin, Gene C Hilton, Robert Daniel Horansky, Peter Joseph Lowell, Michael D. Niemack, Nicholas G Paulter Jr, Carl D Reintsema, Francis Joseph Schima, Robert E Schwall, Ki W. Yoon, Peter Ade, Carole Tucker, Simon Dicker, Mark Halpern
Abstract: We are developing a 350 GHz cryogenic passive video imaging system. This demonstration system uses 800 photon-noise-limited superconducting transition edge sensor bolometers. It will image a 1 m x 1 m area at a standoff distance of 16 m to a resoluti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905563

13. Time-domain spectroscopy of the optical free-induction decay from vibrating molecules
Topic: Remote Sensing
Published: 4/26/2010
Authors: Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: Time-domain spectroscopy using dual, coherent frequency combs is used to measure free-induction decay from a molecular gas sample in the near-IR with a time-domain signal-to-noise ratio of ~10^u6^ over a ~6 ns window at 55 fs time resolution (corresp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903774

14. Molecular spectroscopy with frequency combs
Topic: Remote Sensing
Published: 3/1/2010
Author: Ian R Coddington
Abstract: Pulsed femtosecond frequency combs are rapidly developing as a powerful spectroscopic tool. As a spectroscopic source stabilized frequency combs potentially offer broad spectral coverage, near perfect frequency accuracy, low timing jitter and broadb ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904602

15. Polarized Optical Scattering Signatures from Biological Materials
Topic: Remote Sensing
Published: 1/11/2010
Authors: W. E. Martin, E. Hesse, J. H. Hough, William Sparks, C. S. Cockell, Z. Ulanowski, Thomas Avery Germer, B. Kaye
Abstract: The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350 to 850nm. Incident circular, linearly polarized, and unpolarized light produces significant spectrally prominent scattered polari ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906031

16. Precision ranging LIDAR using femtosecond fiber lasers
Topic: Remote Sensing
Published: 6/17/2009
Authors: Nathan Reynolds Newbury, Ian R Coddington, William C Swann
Abstract: We discuss a coherent laser radar that uses two coherent femtosecond fiber lasers to perform absolute ranging at long distance. One coherent femtosecond fiber lasers acts as a source and the other as a local oscillator for heterodyne detection of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902779

17. A microfabricated photonic magnetometer
Topic: Remote Sensing
Published: 6/14/2009
Authors: Jan Preusser, Svenja A Knappe, Vladislav Gerginov, John E Kitching
Abstract: A system for sensing magnetic fields is proposed, composed of an array of passive microfabricated alkali atom sensor heads coupled to a control unit using only optical interconnects. The optical coupling can be achieved by either free-space transmiss ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905648

18. Absolute Flux Calibration of Stars; Calibration of the Reference Telescope
Topic: Remote Sensing
Published: 6/2/2009
Authors: Allan W. Smith, John Taylor Woodward IV, Colleen Alana Jenkins, Steven W Brown, Keith R Lykke
Abstract: Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega with instruments calibrated using the Planckian radiance from a Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 3 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900900

19. Rapid and precise absolute distance measurements at long range
Topic: Remote Sensing
Published: 6/1/2009
Authors: Ian R Coddington, William C Swann, Ljerka Nenadovic, Nathan Reynolds Newbury
Abstract: The ability to determine absolute distance to an object is one of the most basic measurements of remote sensing. High precision ranging has important applications in both large-scale manufacturing and in future tight formation-flying satellite missio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901111

20. Towards a Remote Sensing Capability for Life s Chiral Signature using Circular Polarization
Topic: Remote Sensing
Published: 5/12/2009
Authors: William Sparks, James H. Hough, Thomas Avery Germer, Feng Chen, Shiladitya DasSarma, Priya DasSarma, Frank Robb, Neill Reid, Nadine Manset, Ludmilla Kolokolova, F. D. Macchetto, William Martin, Ed Turner
Abstract: The unique macroscopic homochirality of biological material offers the prospect of being detectable remotely using circular polarization. To explore this concept, we present spectropolarimetry of primitive photosynthetic microbial organisms. The refl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842489



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