• MODIS Pic of the Day 27 October 2022

    From Dan Richter@1:317/3 to All on Thu Oct 27 12:00:12 2022
    October 27, 2022 - Snow in the Mountains of Hokkaido

    snow
    Tweet
    Share

    Stormy weather and dropping temperatures brought fresh snow to the
    Ishikari Mountains, Hokkaido, Japan in late October 2022.

    The Moderate Resolution Imaging Spectroradiometer (MODIS) on board
    NASA’s Aqua satellite acquired a true-color image of the winter-like
    scene on October 26, the day after clouds cleared. Snow sits on the
    highest elevations and is most abundant in Daisetsuzan National Park,
    an area where summer is short (July to August), September is laden with
    multi-colored leaves, and October brings the first winter snows.

    True-color images use three different MODIS bands (1,4,3) to create a
    view much like would be seen by the human eye, if we could actually see
    from space. Scientists often use different sets of MODIS data to create
    images that look different than human vision. Called false-color
    images, they are helpful in highlighting various features of scientific
    interest. In this true-color image, the mountain snow appears white and
    so do the clouds scattered over the island. In addition, the snow
    appears somewhat dark and grainy in some places, giving an appearance
    much like one would see with fog. In other areas, the zig-zag patterns
    suggest either snow on mountain peaks or fog in mountain valleys.

    By selecting a false-color image that uses MODIS bands 7,2,1, it
    becomes simple to sort out snow from cloud and fog. In this type of
    image, snow looks bright electric blue while most clouds appear white
    except for high, very cold cloud containing ice crystals which may be
    tinted with light electric blue. Fog, which is low cloud, would also
    appear white while vegetation looks green.

    Thanks to the NASA Worldview App, comparing false-color and true-color
    images are fast and easy. To see a roll-over comparison between this
    Aqua MODIS true-color image and the same image in false-color, click
    here.

    Image Facts
    Satellite: Aqua
    Date Acquired: 10/26/2022
    Resolutions: 1km (218 KB), 500m (580.8 KB), 250m (401.4 KB)
    Bands Used: 1,4,3
    Image Credit: MODIS Land Rapid Response Team, NASA GSFC



    https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-10-27

    --- up 34 weeks, 3 days, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)