Search found 3 matches

by NSIDC - greckase
Mon Nov 14, 2022 1:02 pm America/New_York
Forum: Questions/Comments
Question: parameter values
Replies: 1

Re: parameter values

Thank you for reaching out. NDSI_Snow_Cover is the the snow cover map with cloud and other masks overlaid. The NDSI value is scaled to the 0 - 100 range and was converted to byte from float datatype. All NDSI <= 0 are set to 0. Any pixel failing one or more of the data screens is set to 0 or other n...
by NSIDC - greckase
Mon May 02, 2022 1:43 pm America/New_York
Forum: Questions/Comments
Question: MODIS: Limitations of Visible Bands
Replies: 1

Re: MODIS: Limitations of Visible Bands

MODIS is an optical sensor, which has inherent limitations in observing sea ice and snow. Unlike a passive-microwave sensor, which can detect microwave energy through clouds, MODIS cannot observe the surface when cloud cover is present. MODIS products, therefore, have cloud masks built into the data...
by NSIDC - greckase
Mon May 02, 2022 12:49 pm America/New_York
Forum: Questions/Comments
Question: MODIS: Choosing between Aqua and Terra products
Replies: 2

Re: MODIS: Choosing between Aqua and Terra products

Because MODIS sensors have flown on both the Terra and Aqua satellites, NSIDC offers parallel products derived from MODIS on each satellite. Terra and Aqua products are very similar with a few key differences: Terra launched two years before Aqua, so the Terra record starts earlier, with observation...