SPIRIT – database and data access Andrey A. Perzov, Sergey V. Kuzin, Sergey A. Bogachev, Vladimir A. Slemzin, Sergey V. Shestov, Oleg I. Bugaenko

SPIRIT is a space complex of telescopes that works at the Earth orbit from August 2001 and includes the following instruments … SPIRIT data types 4 channels

TELESCOPE 2 2 channels TELESCOPE 1 4 channels IMAGING SPECTROGELIOGRAPH Mg XII 8.42 A 2 channels XUV SPECTROGELIOGRAPH 2 channels

TELESCOPE A channel 195 A channel 284 A channel 304 A channel TOTAL: ~ images during 4.5 years (12 Gb)

TELESCOPE A channel 304 A channel TOTAL: ~ images during 4.5 years (50 Gb)

IMAGING SPECTROGELIOGRAPH Mg XII 8.42 A TOTAL: ~ images during 4.5 years (200 Gb)

XUV SPECTROGELIOGRAPH A A TOTAL: ~ images during 4.5 years (10 Gb)

TOTAL NUMBER OF THE SPIRIT IMAGES TELESCOPE A A A A3 100 TELESCOPE A A IMAGING SPECTROGELIOGRAPH Mg XII Mg Mg XUV SPECTROGELIOGRAPH XUV XUV TOTAL: images of the Sun during 4.5 years of work

Full cycle of SPIRIT data processing 1. On-board registration and processing 2. Data analysis and improvement 3. Converting data to FITS and filling the database

On-board processing

Data analysis and improvement Automatic software: –Lost data filling –Flat field correction User software: –Background subtraction –Finding of coordinates Full package of SPIRIT software will be available in SSW from January-February 2006

Methods of the lost pixel reconstruction: a)Comparison with the same pixels in the adjacent images b)bilinear interpolation from the adjacent rows Lost data recovering

Method of the reconstruction (3 steps): 1.We synthesize the mask of damage (one mask for one SPIRIT channel) 2.We multiply the data matrix by this mask of damage 3. Places of most strong damage are reconstructed by the bilinear interpolation as the lost pixels Recovering of the places with filter damage

Methods of the mask calculation a) Averaging of the long series of one channel images b) Method of Kuhn-Lin-Loranz (PASP, 1991, V. 103, P. 1097) Flat field mask Flat field correction

F1F1 F 20 F3F3 F2F2 … Background subtraction

Description of the problem –Axe of the satellite varies slowly in time that leads to some uncertainty in the position of the Sun disk in the image –For correct analysis of the data, it is necessary to compensate this shifting with the precision of about 1 pixel Orientation problem and its solving

Method We find the position of the Sun disk in the image with our own method based on the successive approaches to the Sun limb Result (in CCD pixels) X=253.5 Y=301.2 R=182.5 Итерация 1Итерация 2Итерация 3 Orientation problem and its solving

An example of SPIRIT data after the finishing of full processing cycle

Converting the data to FITS format The upper part coincides with the SOHO/EIT header. It allows to directly apply all the EIT programs for processing of the SPIRIT fits files. Header of the SPIRIT fits files consists of the two main parts The lower part includes an additional information on the SPIRIT data. This information is necessary for more detail processing – for example, for decision of ballistic tasks.

Upper part of the header SPIRIT HEADERSOHO/EIT HEADER coincides with the SOHO/EIT

Lower part of the header (provides additional information on the SPIRIT data) Ballistic information

Structure of the SPIRIT data base SQL Database Management System HTML SPIRIT home page FTP base of images Direct FTP access Access through web site Request

SPIRIT FTP server Address: ftp://serv99.lebedev.ru/dataftp://serv99.lebedev.ru/data Login: xrasuser Password:userxras Now are acceptable through FTP: Telescope 1 4 channels, all the images, free access Telescope 2 2 channels, all the images, free access XUV-Spectrogeliograph 2 channels, all the images, free access

SPIRIT web page Address:

FTP access through web page Address:

Access through SQL based data search system Address: