Dataset name:
IMS (Ice Mapping System) Daily Northern Hemisphere Snow and Ice Analysis

Varialbe name: 
scover (snow cover)

Reference of original data:
Helfrich, S. R., M. Li, and C. Kongoli. 2012. Interactive Multisensor Snow and Ice Mapping System Version 3 (IMS V3) Algorithm theoretical basis document version 2.0 Draft 4.1. Noaa NESDIS Center for Satellite Applications and Research (STAR). 59 pp.
Helfrich, S. R., D. McNamara, B. H. Ramsay, T. Baldwin, and T. Kasheta. 2007. Enhancements to, and forthcoming developments to the Interactive Multisensor Snow and Ice Mapping System (IMS), Hydrological Processes 21: 12, 1576-1586. 

Downloaded site:
http://nsidc.org/data/docs/noaa/g02156_ims_snow_ice_analysis

Downloaded Date:
Mar 2015

Downloaded by:
Emanuel Dutra
European Centre for Medium-Range Weather Forecast, Reading, UK

Name and Version of original source:
    IMS Daily Northern Hemisphere Snow and Ice Analysis v1.2+v1.3

Start date:
January, 2004

End date:
December, 2015

Temporal resolution:
daily

Spatial resolution:
4 X 4 sq.km

Unit: 
snow/snow+land

Data format: 
ascii