Data Reduction and Products Posters
Presiding: R Bogart, Stanford University; R Nightingale, Lockheed Martin Advanced Technololgy Center
SP51A-01 0830h
Long Exposure Point Spread Function Estimation from Adaptive Optics Loop Data
Current work in Solar Physics requires high resolution observations from ground based telescopes. However, the performance of any ground based telescope is ultimately limited by optical aberrations produced by atmospheric turbulence. Adaptive Optics (AO) is a powerful tool that artially corrects for these optical aberrations in real time, considerately improving the image quality. Wavefront sensor and mirror data produced by the AO system during closed loop operation contains information about correction performance and seeing conditions. We present a method to estimate the Long Exposure Point Spread Function (LEPSF) of the AO corrected image using AO loop data. This estimation can then be used to improve image quality using deconvolution post-processing techniques. In Solar Physics observations seeing conditions are highly variable. Thus, an estimation of the LEPSF is only useful if it corresponds to the exact time an image was taken. LEPSFs produced by this method are simultaneous with the captured AO corrected image. We will apply this method to time series of intensity images, velocity maps and line of sight magnetic field of sunspots and pores. Obtaining high resolution AO and post-facto corrected data with homogeneous image quality and more reliable quantitative measurements.
SP51A-02 0830h
Reduction of SOLIS/Vector Spectromagnetograph He I 1083 nm Observations
The SOLIS/Vector Spectromagnetograph (VSM) now continues the three-decade record of full-disk He I 1083 nm spectroheliograms from NSO/Kitt Peak (see poster by Henney et al.). Although the sensitivity of the VSM interim cameras at 1083 nm is far greater than that of previous NSO/KP instruments, the observations are compromised by strong interference fringes produced within the detectors. We discuss in some detail the extent to which this difficulty is overcome in the simple algorithm used to produce the synoptic observations and explore methods for removing remaining fringe effects for true imaging spectroscopy. These techniques include Fourier and Wavelet filtering, the flat-fielding algorithm used for earlier NASA/NSO Spectromagnetograph (SPM) observations, and physical modeling of the detector fringe pattern.
SP51A-03 0830h
ISOON + SOLIS: Merging the Data Products
The combination of AFRL's ISOON and NSO's SOLIS offers significantly greater capability than the individual instruments. We are working toward merging the SOLIS and ISOON data products in a single central facility. The ISOON system currently includes both an observation facility and a remote analysis center (AC). The AC is capable of receiving data from both the ISOON observation facility as well as external sources. It archives the data and displays corrected images and time-lapse animations. The AC has a large number of digital tools that can be applied to solar images to provide quantitative information quickly and easily. Because of its convenient tools and ready archival capability, the ISOON AC is a natural place to merge products from SOLIS and ISOON. We have completed a preliminary integration of the ISOON and SOLIS data products. Eventually, we intend to distribute viewing stations to various users and academic institutions, install the AC software tools at a number of user locations, and publish ISOON/SOLIS data products jointly on a common web page. In addition, SOLIS data products, separately, are and will continue to be fully available on the NSO,s Digital Library and SOLIS web pages, and via the Virtual Solar Observatory. This work is being supported by the National Science Foundation and the Air Force Office of Scientific Research.
SP51A-04 0830h
SOLIS-VSM Synoptic Products
Since August 2003, the Vector Spectromagnetograph (VSM) instrument has recorded full-disk photospheric and chromospheric magnetograms along with He I 1083 nm spectroheliograms daily as part of the Synoptic Optical Long-term Investigations of the Sun (SOLIS) project. In addition, the VSM measured full-disk photospheric vector magnetograms weekly. After the full deployment of the VSM data processing system, a typical observing day will include three full-disk photospheric vector magnetograms. Products from observations for the past year and half are expected to become available during the year 2005, these include Dopplergrams, equivalent width and line depth images. Besides individual full-disk images, several derived products are also or soon will be available via the SOLIS web site. These products include integrated full-disk magnetogram and helium spectroheliogram time series. Additionally, Carrington rotation and daily synoptic maps are now available from the photospheric magnetograms. Daily coronal hole estimate images using VSM data, along with the creation of solar wind source maps will also be available. The VSM synoptic products are available on the NSO-SOLIS web site at: http://solis.nso.edu/. SOLIS VSM data used here are produced cooperatively by NSF/NSO and NASA/GSFC. The National Solar Observatory is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation.
http://solis.nso.edu/
SP51A-05 0830h
The User Interface of the European Grid of Solar Observations
The European Grid of Solar Observations (EGSO) is a grid testbed funded by the European Commission's Fifth Framework Program under its Information Society Technologies (IST) thematic priority. This 3-year project was designed to provide enhanced access to solar and related data around the world. The services provided by EGSO can be accessed through different interfaces. The main access is a Web-based Graphical User Interface (GUI) that allows the user to access the services offered by the grid in a common and integrated way. Also, an Application Programming Interface (API) is available in the SolarSoft package, that allows access to the services from IDL applications. Furthermore, various dedicated web interfaces allow to access individual catalogs built in the framework of this project, such as the Solar Event Catalog (SEC), the Solar feature Catalog (SFC), and the Unified Observing Catalog (UOC). In this paper we present the final version of the Grid, featuring the latest GUI, the new IDL API, as well as the access to the different catalogs and registries that help resolving complex queries and route them through the appropriate nodes of the Grid. The featured version of the GUI also provides users with a new function that helps them to search for instruments based only on some observational characteristics. In this final version, all major and recent solar data sets are now accessible from EGSO. EGSO is also closely coupled to the Collaborative Sun-Earth Connector (CoSEC), another virtual observatory-related project, from which it uses processing services. More information about EGSO can be found under http://www.egso.org/
http://www.egso.org