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Facility for spectral irradiance and radiance responsivity calibrations using uniform sources

Steven W. Brown, George P. Eppeldauer, Keith R. Lykke
2006 Applied Optics  
The details of the facility and its effect on primary national radiometric scales are discussed.  ...  typical combined standard uncertainties in irradiance and radiance responsivity calibrations of less than 0.1%.  ...  Based on these measurements, a stray light correction algorithm can be implemented that reduces the errors and associated uncertainties arising from stray light an order of magnitude or more. 47, 65,  ... 
doi:10.1364/ao.45.008218 pmid:17068565 fatcat:moxuaqbvgfchli5e5ym3rwkyxu

Relative Intensity Correction of Raman Spectrometers: NIST SRMs 2241 through 2243 for 785 nm, 532 nm, and 488 nm/514.5 nm Excitation

Steven J. Choquette, Edgar S. Etz, Wilbur S. Hurst, Douglas H. Blackburn, Stefan D. Leigh
2007 Applied Spectroscopy  
These SRMs each consist of an optical glass that emits a broadband luminescence spectrum when illuminated with the Raman excitation laser.  ...  Peak area ratios of the intensity-corrected Raman spectrum of cyclohexane are presented as an example of a methodology to validate the spectral intensity calibration process and to illustrate variations  ...  ACKNOWLEDGMENTS The authors wish to thank Professor Richard McCreery of The Ohio State University for many useful discussions and James Maslar of NIST for discussions and help in the laboratory.  ... 
doi:10.1366/000370207779947585 pmid:17331302 fatcat:rbe6wnmf4rfsnh2r37p3onay6e

Characterization of three high efficiency and blue sensitive silicon photomultipliers

Adam Nepomuk Otte, Distefano Garcia, Thanh Nguyen, Dhruv Purushotham
2017 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
It is further demonstrated how the voltage and temperature characteristics of a number of quantities can be parameterized on the basis of physical models.  ...  The models provide a deeper understanding of the device characteristics over a wide bias and temperature range.  ...  ACKNOWLEDGMENT We are grateful to FBK, Hamamatsu, and SensL for providing us with samples of their latest developments.  ... 
doi:10.1016/j.nima.2016.09.053 fatcat:mw7b7aqcizgcdeppkv4lr4v2ym

Prelaunch characteristics of the Moderate Resolution Imaging Spectroradiometer (MODIS) on EOS-AM1

W.L. Barnes, T.S. Pagano, V.V. Salomonson
1998 IEEE Transactions on Geoscience and Remote Sensing  
Descriptions of these subsystems are also on the MODIS homepage.  ...  Based on this demonstrated capability, the MODIS Science Team, an international group of 28 land, ocean, atmosphere, and calibration remote-sensing scientists, has commenced delivery of algorithms that  ...  Stray Light Stray light rejection in the MODIS has two parts: near-field response (NFR) and far-field response (FFR).  ... 
doi:10.1109/36.700993 fatcat:2nz52himybb7zm4xp2r5tfff3i

Tunable, continuous-wave Terahertz photomixer sources and applications

S. Preu, G. H. Döhler, S. Malzer, L. J. Wang, A. C. Gossard
2011 Journal of Applied Physics  
Lett. 100, 262604 (2012) Generation of pure phase and amplitude-modulated signals at microwave frequencies Rev. Sci. Instrum. 83, 064705 (2012) Additional information on J. Appl. Phys.  ...  Realization of gigahertz-frequency impedance matching circuits for nano-scale devices Appl. Phys. Lett. 101, 053108 (2012) Synchronization of a renewable energy inverter with the grid J.  ...  Schmidt, Univ. of Erlangen-Nuremberg, E. R. Brown, Univ. of California, Santa Barbara, USA, and to H. Roskos, H. Maestre, and A.  ... 
doi:10.1063/1.3552291 fatcat:bgfqii2pwrgr3cpc7vhrtaulii

Microscopy capabilities of the Microscopy, Electrochemistry, and Conductivity Analyzer

M. H. Hecht, J. Marshall, W. T. Pike, U. Staufer, D. Blaney, D. Braendlin, S. Gautsch, W. Goetz, H.-R. Hidber, H. U. Keller, W. J. Markiewicz, A. Mazer (+12 others)
2008 Journal of Geophysical Research  
Light-emitting diode illumination allows for full color optical imaging of the samples as well as imaging of ultraviolet-induced visible fluorescence.  ...  The atomic force microscope uses an array of silicon tips and can operate in both static and dynamic mode.  ...  A stray-light test was performed using the MECA OM test bed with overhead illumination from a laminar flow bench.  ... 
doi:10.1029/2008je003077 fatcat:jiwvcqfvvnbvdl6ncfvowqie4a

MAXIMA: A balloon-borne cosmic microwave background anisotropy experiment

B. Rabii, C. D. Winant, J. S. Collins, A. T. Lee, P. L. Richards, M. E. Abroe, S. Hanany, B. R. Johnson, P. Ade, A. Balbi, J. J. Bock, J. Borrill (+11 others)
2006 Review of Scientific Instruments  
We describe the Millimeter wave Anisotropy eXperiment IMaging Array (MAXIMA), a balloon-borne experiment designed to measure the temperature anisotropy of the Cosmic Microwave Background (CMB) on angular  ...  Two MAXIMA flights with more than 8.5 hours of CMB observations have mapped a total of 300 deg^2 of the sky in regions of negligible known foreground emission.  ...  The stimulator was mounted inside the cold optics box and was fitted with a light pipe to illuminate the focal plane array from just outside the optical path.  ... 
doi:10.1063/1.2219723 fatcat:xnklhwy7v5ck7cfg775rptjty4

Observing The Cosmic Microwave Background Polarization Anisotropy At 40 Ghz With Quiet

Colin Bischoff, Bruce Winstein
2010 Zenodo  
The Q/U Imaging Experiment (QUIET) is designed to make sensitive measurements of the CMB polarization using arrays of integrated "detectors on a chip" that can be scaled to reach the sensitivity requirements  ...  The theory of inflation, which has been proposed to explain several curious features of our universe, predicts the existence of B-mode fluctuations on large angular scales and at a signal level that may  ...  The characteristic pattern of large leakage in Q diodes and smaller leakage in U diodes can be clearly seen.  ... 
doi:10.5281/zenodo.19096 fatcat:w2zijutueredndbtlycjmjlegu

1981 IEEE Ultrasonics Symposium Abstracts

1982 IEEE Transactions on Sonics and Ultrasonics  
Unlike interferometer schemes previously reported, this detector is made stable against vibration and beam path instability by means of an ultrasonic pilot signal and AGC loop.  ...  The effect of digitization on sidelobe levels can be predicted accurately, as well as the amplitude level of grating lobes and the effects of apodization and use of short pulses.  ...  This technique relies on the high conductivity of the PtSi metallization of the diodes to allow the top-plate t o be placed outside of the acoustic beam path and not on the ZnO, thus eliminating any spurious  ... 
doi:10.1109/t-su.1982.31328 fatcat:iqcv7fhisjghfahxhthjfjb4i4

Calibration and Performance Evaluation of Miniature Ultrasonic Hydrophones Using Time Delay Spectrometry

P.A. Lewin
1981 1981 Ultrasonics Symposium  
Unlike interferometer schemes previously reported, this detector is made stable against vibration and beam path instability by means of an ultrasonic pilot signal and AGC loop.  ...  The effect of digitization on sidelobe levels can be predicted accurately, as well as the amplitude level of grating lobes and the effects of apodization and use of short pulses.  ...  This technique relies on the high conductivity of the PtSi metallization of the diodes to allow the top-plate t o be placed outside of the acoustic beam path and not on the ZnO, thus eliminating any spurious  ... 
doi:10.1109/ultsym.1981.197704 fatcat:hqap7ioh55dn5ilt2y4nojqnbi

On-orbit performance of the Spitzer Space Telescope: science meets engineering

Michael W. Werner, Patrick J. Lowrance, Tom Roellig, Varoujan Gorjian, Joseph Hunt, Charles M. Bradford, Jessica Krick
2022 Journal of Astronomical Telescopes Instruments and Systems  
We avoid discussion of less unique systems, such as the telecom, flight software, and electronics systems and do not address the innovations in mission and science operations which the Spitzer team initiated  ...  These and other items of potential interest are addressed in references supplied in an appendix to this paper.  ...  Current projects include a balloon-borne far-IR spectrometer, an on-chip mm-wave spectrometer demonstration, and a mm-wave line intensity mapping instrument.  ... 
doi:10.1117/1.jatis.8.1.014002 fatcat:cqucujzqtrc6ped3mygfs6qvme

Optical oceanography: Recent advances and future directions using global remote sensing and in situ observations

T. Dickey, M. Lewis, G. Chang
2006 Reviews of Geophysics  
These problems include: primary productivity, ecosystem dynamics, biogeochemical cycling, upper ocean heating, and the impacts of anthropogenic disturbances on ocean dynamics.  ...  Remote sensing of ocean color from aircraft-and satellite-borne instruments is vital to obtain regional-and global-scale optical data synoptically.  ...  He thanks three anonymous technical reviewers and one crossdisciplinary reviewer.  ... 
doi:10.1029/2003rg000148 fatcat:2cbifn57ozbrpjjwdsqsfinum4

Emerging trends of optical interferometry in astronomy [article]

S.K. Saha
1999 arXiv   pre-print
The current status of the high spatial resolution imaging interferometry in optical astronomy is reviewed in the light of theoretical explanation, as well as of experimental constraints that exist in the  ...  set on their comparisons.  ...  electron bombarded CCD (Cuby et al., 1990) , (iv) avalanche photo-diodes (Zappa et al., 1996) , (v) Back-illuminated bare CCD (Twichell et al., 1990 , Beletic, 1996 , (vi) infra-red photo-diode arrays  ... 
arXiv:astro-ph/9910227v1 fatcat:sifsq2en2jbnxe53cy6dcdhigu

International X-ray Observatory (IXO) Assessment Study Report for the ESA Cosmic Vision 2015-2025 [article]

X. Barcons, D. Barret, M. Bautz, J. Bookbinder, J. Bregman, T. Dotani, K. Flanagan, R Fraga-Encinas, J. Grady, H. Kunieda, D.H. Lumb, K. Mitsuda, K. Nandra (+8 others)
2011 arXiv   pre-print
We provide a description of the IXO science objectives, the mission implementation and the payload.  ...  The performance will offer more than an order of magnitude improvement in capability compared with Chandra and XMM-Newton.  ...  The camera consists of an array of CCDs with associated electronics, thermal control and radiation, stray light and contamination shielding.  ... 
arXiv:1102.2845v1 fatcat:u6gaukg67rabrbmwafubv7jzvi

A New Mid-Infrared Camera for Ground-Based Astronomy and an Infrared Study of Planetary Nebulae

Joseph L. Hora
1992 Publications of the Astronomical Society of the Pacific  
The inside of this compartment, along with the optics housing, is painted black to reduce scattering of stray light on to the detector.  ...  The direction of the beam was then adjusted so it is normal to the dewar window. A white card with a crosshair was placed at the position of the array, and the card was illuminated from the side.  ...  The data field contains the number of bytes to send minus 1 (n-1). The number of words depends on the observing mode and the number of pixels to be read out.  ... 
doi:10.1086/133034 fatcat:aw2cab7yrngmfmnejmuaicx7qe
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