This study explores the diurnal variation, from midday to sunset, in broadband blue-sky albedo (α) of soils with respect to their surface roughness. Five roughness levels of soil surfaces shaped by a plow, spike tooth harrow and roller, then also modified by rain, developed from the same soil material, were examined. The relation between α and the solar zenith angle enabled us to predict in which solar local time for chosen days of year the α of such surfaces, located between the latitude angles of 70° in the Northern and Southern Hemispheres, reaches its average diurnal value [(α)] . The usefulness of remote sensing satellite instruments for [(α)] approximation of the surfaces is evaluated here as the consequences of the difference between the optimal time for their [(α)] approximation and the time when the satellite instruments on the sun-synchronous orbits passing over the surfaces can observe them. Two examples of the orbits: close to that being optimal to the [(α)] approximation like NOAA-15, as well as that most often have been used to the α estimation such as MODIS instrument on the EOS Terra platform are considered.