Spectral Library Structure in Earth Surface Remote Sensing

Spectral Library Structure in Earth Surface Remote Sensing Denitsa Borisova*a, Doyno Petkova, Valentina Hristovaa, b, Ventzeslav Dimitrova, Victor Savorskiyc, Dmitry Ermakovc Space Research and Technology Institute - Bulgarian Academy of Sciences; b Dept. of Electrical Engineering and Physics, “Todor Kableshkov” University of Transport; c Kotel’nilov Institute of radioengineering and electronics – Russian Academy of Sciences, Fryazino department a dborisova@stil. bas. bg astronomer@abv. bg Symposium of USLMB 2020 4 -6 November 2020 Sofia

SUMMARY Spectral libraries are in the basis of the remote sensing and are a significant tool of storing and managing spectral data for facilitating the satellite imagery analysis and the identification of investigated objects on the earth's surface. Currently, spectral data are stored in various spectral databases some of them structured as libraries around the world. The data are obtained during in-situ /terrain, field, in the atmosphere, on the water surface, etc. / and laboratory spectrometric measurements using spectrometers with different radiometric, spatial and spectral resolutions and in different ranges of the solar electromagnetic spectrum. Most spectrometric measurements of the spectral characteristics of the studied objects are not standardized and in some libraries the experimental parameters (for example, measurement conditions) are not described. This paper presents the study on the structure and design of the existing spectral libraries. The study was prepared in relation to a project funded by the Bulgarian National Science Fund, Contract number KP-06 -M 27/2. Symposium of USLMB 2020 4 -6 November 2020 Sofia

Aim ØThe aim is to study the structure and design of the existing spectral libraries in remote sensing ØThe authors were prepared this study in relation to presenting spectral data obtained during terrain and laboratory spectrometric measurements in Earth surface remote sensing monitoring from space Symposium of USLMB 2020 4 -6 November 2020 Sofia

US Geological Survey /USGS/ Spectral Library The biggest spectral library in the world: https: //www. usgs. gov/labs/spec-lab Symposium of USLMB 2020 4 -6 November 2020 Sofia

Project ECOSTRESS Spectral Library The newest spectral library: https: //ecostress. jpl. nasa. gov/ Symposium of USLMB 2020 4 -6 November 2020 Sofia

Project ASTER Spectral Library Advanced Spaceborne Thermal Emission and Reflection Radiometer Spectral Library: https: //asterweb. jpl. nasa. gov Symposium of USLMB 2020 4 -6 November 2020 Sofia

Moscow State University Spectral Library Geoinformation complex “Geoportal”: http: //www. geogr. msu. ru/science/projects/geoportal/ Symposium of USLMB 2020 4 -6 November 2020 Sofia

Arizona State University /ASU/ Spectral Library In relation to explore Mars: https: //speclib. asu. edu/ Symposium of USLMB 2020 4 -6 November 2020 Sofia

RELAB Spectral Library In relation to future space missions: http: //www. planetary. brown. edu/relab/ Symposium of USLMB 2020 4 -6 November 2020 Sofia

SPECCHIO Spectral Library host by University of Zurich UZH & University of Applied Sciences and Arts Northwestern Switzerland: https: //specchio. ch/ Symposium of USLMB 2020 4 -6 November 2020 Sofia

Spectral Database Structure Spectral database Spectral data Metadata Additional information All information is going to be presented as. csv file including all the required data. The license is going to be the Open Database License Symposium of USLMB 2020 4 -6 November 2020 Sofia

Information System Structure Basic architecture and relation in information system for fundamental space research [Savorskiy et al. , Project of United Information System for Fundamental Space Research, 2011 (in Russian)] Symposium of USLMB 2020 4 -6 November 2020 Sofia

Space Collection Database Structure Database structure for storing collections of space data with describing [Аквилонова и др. , Работа информационной системы НЦ ОМЗ с данными прибора MODIS космического аппарата TERRA, 2006] Symposium of USLMB 2020 4 -6 November 2020 Sofia

Conclusions Ø Based on the studying spectral libraries structure and design, as well as the previous experience of the authors, and also remote spectrometric measurements, obtained spectral data, the capabilities of available information systems in the Remote Sensing Systems Dept. at the Space Research and Technology Institute at Bulgaria academy of sciences, lead to the planning of creating a thematic spectral library as a database with free access after registration. Ø Easy access to spectral data requires the use of open source software, simple text versions of spectral data and their visualizations, text files in Hyper. Text Markup Language (HTML) format with metadata and additional information. Ø The authors intend to offer the possibility of using spectral data by specialists working in different fields, following the procedures for accessing thematic spectral database and downloading the spectral data. Symposium of USLMB 2020 4 -6 November 2020 Sofia

Thank you for the attention! Acknowledgements This work is supported by Bulgarian National Science Fund under Contract number KP-06 -M 27/2 Symposium of USLMB 2020 4 -6 November 2020 Sofia