solar stray light: topics by science.gov

When light strays, part 1 | Astronomy.com

The scattered light of Image #2 is equally impressive. All stars, especially the brightest ones, show a many-spoked radial diffraction pattern. A turned down edge (TDE) of the primary mirror

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Deep Space Climate Observatory, Earth Science …

Jun 29, 2016· Stray light was measured in the laboratory using a series of small diameter light sources entering the telescope and being detected by the CCD. The illumination by pixels outside the main diameter of the light source was measured. A detailed matrix map was made of the entire stray light function (the effect of

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New antireflective coating reduces stray light and

Oct 21, 2016· The results show that the technique noticeably reduces what is known as stray light: reflected light that scatters through the lens systems, for example in …

Effect of solar stray light on imaging quality of infrared

Nov 05, 2020· The solar stray light will seriously affect the imaging quality of the infrared detection system. The traditional point source transmittance (PSF) index is difficult to evaluate the image degradation of the detection system due to stray light. In this paper, a stray light simulation is performed firstly for a given infrared detection system

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Analysis and Reduction of Solar Stray Light in the

Solar stray light is a fatal problem for optical satellite works in the polar orbit, even for nighttime scene imaging, resulting in image saturation and light signal detection failure. To solve this problem, an analysis of the range of solar incident angles was conducted firstly.

stray light artifacts: Topics by Science.gov

Microtextured metals for stray-light suppression in the Clementine startracker. NASA Technical Reports Server (NTRS) Johnson, E. A. 1993-01-01. Anodized blacks for suppressing stray light in optical systems can now be replaced by microscopically textured metal surfaces. An application of these black surfaces to the Clementine star-tracker navigational system, which will be launched in early

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(PDF) Soumi NPP VIIRS Day/Night Band Stray Light

Science Applications International Corp., Goddard Space Flight Center Code 616, Greenbelt, MD 20771, USA. and blue curves are the signals after stray light correction. SZA = solar.

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HUBBLE SPACE TELESCOPE SYSTEMS T

Figure 5-5 shows the aperture door and light shield. The shield is 13-ft (4 m) long, with an internal diameter of 10-ft (3 m). It is machined from magnesium, with a stiffened, corrugated-skin barrel covered by a thermal blanket. Internally the shield has 10 light baffles, painted flat black to suppress stray light…

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Nadir - an overview | ScienceDirect Topics

Stray light ≤ 2%Wavelength registration ≤ 0.01 nm RMSIntra-orbital λ stability ≤ 0.018 nmBandpass knowledge (rel. to peak) ≤ 2% RMSRadiance SNR: NM ≥ 1000Intro-orbital wavelength shift ≤ 0.006 nm (1-sigma)Solar calibration SNR ≥ 1000Calibration mechanism: LEDs for linearity and gain correction.

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Using the USGS Landsat Level-1 Data Product

Landsat Collections Level-1 data products consist of quantized and calibrated scaled Digital Numbers (DN) representing the multispectral image data. Landsat 8 products data acquired by both the Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are delivered in 16-bit unsigned integer format. Landsat 1-7 products are generated from single sensor data and are

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OSA | Design for stray-light reduction to a Martian

The possible sources of stray light might originate from (i) a part of the edge of the aluminum pattern with the Gaussian-shaped structure array, and/or (ii) the light baffle for the aperture at the rear, illuminated by the light beam. The multi-scattered light by the curtain of the clean room could also be the source. Fig. 7.

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B | Astronomy Websites, Images, and Apps - OpenStax

Throughout the textbook, we suggest useful resources for students on the specific topics in a given chapter. Here, we offer some websites for exploring astronomy in general, plus good sites for viewing and downloading the best astronomy images, and guides to astronomical apps for smartphones and tablets.

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Corridor test of Proba-3's formation flying sensors

Mar 30, 2021· In order to simulate solar stray light, a specific lamp with the correct spectral properties was used. This lamp was specially characterized by ESTEC's Optics Laboratory for this test. Proba-3.

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Diode-array UV solar spectroradiometer implementing a

Nov 20, 2014· The implementation of a digital micromirror device in an array spectroradiometer has the potential to enable the precise selection of desired wavelengths as well as the ability to reduce spectral intensity of some wavelengths via selective mirror modulation, both reducing long wavelength stray light.

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AXAF Stray-Light Requirements - NASA

The most stringent SI-detector stray-light requirement is for solar illumination of the HRC-S: log(PST) -10.4 for XUV or -9.0 for UV, depending upon the uncertain decrease of reflectance into the XUV. For reference, the AXAF Observatory Contract End Item (CEI) Specification is approximately log(PST) …

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WISPR Bibliography | Wide-Field Imager for Parker Solar

Stray light analysis and testing of the SoloHI (solar orbiter heliospheric imager) and WISPR (wide field imager for solar probe) heliospheric imagers Thernisien, Arnaud F. R.; Howard, Russell A.; Korendyke, Clarence and 3 more. 2017SPIE10562E..4VH2017/09 Stray light …

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Soumi NPP VIIRS Day/Night Band Stray Light

remote sensing Article Soumi NPP VIIRS Day/Night Band Stray Light Characterization and Correction Using Calibration View Data Shihyan Lee 1,2,* and Changyong Cao 3 1 Science Applications International Corp., Goddard Space Flight Center Code 616, Greenbelt, MD 20771, USA 2 ERT Corp., Laurel, MD 20740, USA 3 NOAA/NESDIS/STAR, College Park, MD 20737, USA; …

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Binoviewers with a .3A filter? - Solar Observing and

May 10, 2005· I can think of several 0.3A and 0.2A Solar Spectrum's and DayStar's that I have looked through and every one of the owners uses a binoviewer. Therefore, I think you are safe taking a risk on the adapter. Even if you need a cloak to reduce stray light, it will still be worth the binoviewer. George

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M1 Microroughness and Dust Contamination

2. SCIENCE REQUIREMENTS AND SKY BRIGHTNESS EXPECTATIONS The science requirement for stray light in the ATST dictate that scattered light must be controlled to less than 25 10-6 of the solar disk irradiance at R/R sun = 1.1 and = 1 m. This is derived from a desire to

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Hinode (Solar-B) First One Month | NAOJ: National

Nov 27, 2006· November 27, 2006 | Science Hinode (Solar-B) project team released several images and movies of "microscopic" observations of the sun taken by Solar Optical Telescope (SOT). Hinode's SOT is the first spcae-borne instrument to measure the strength and direction of the sun's magnetic field in the photosphere.

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Preliminary analysis of stray light impact and strategies

Jun 16, 2014· Stray light increases the background detected by Gaia and thus the associated noise. The impact is largest for the faintest stars, where the noise associated with the stellar light itself is comparable to that from the background, but there is minimal impact on brighter ones, for which the background is an insignificant fraction of the total flux.

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OSA | Design for stray-light reduction to a Martian

We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm stray-light performance with ∼10−8 rejection viewing as close as 1.0° to a bright-light source.

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SBN Data by Target Type: Asteroids - PDS: Small Bodies

Rosetta-Orbiter OSIRIS Narrow Angle Camera Cruise 5 Resampled-D (Solar Stray Light and Geometric Distortion Corrected in Reflectance Units) Data; Rosetta-Orbiter OSIRIS Wide Angle Camera Cruise 5 Resampled-D (Solar Stray Light and Geometric Distortion Corrected in Reflectance Units) Data (12) Victoria. Submillimeter Lightcurves of Asteroids (21

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WISPR Bibliography | Wide-Field Imager for Parker Solar

Stray light analysis and testing of the SoloHI (solar orbiter heliospheric imager) and WISPR (wide field imager for solar probe) heliospheric imagers Thernisien, Arnaud F. R.; Howard, Russell A.; Korendyke, Clarence and 3 more. 2017SPIE10562E..4VH2017/09 Stray light …

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