CERES FOV and Footprint

Please enter here to ask a question about any NASA Science related topics!
Post Reply
Posts: 268
Joined: Thu Jul 11, 2019 4:32 pm America/New_York
Answers: 2

CERES FOV and Footprint

by EarthdataForumContributor » Fri Jan 03, 2020 2:14 pm America/New_York

What is the CERES FOV or Footprint?


User Services
User Services
Posts: 163
Joined: Fri Jul 12, 2019 9:29 am America/New_York

Re: CERES FOV and Footprint

by asdc_user_services » Fri Jan 03, 2020 2:14 pm America/New_York

The CERES Field of View (FOV) is synonymous with the term Footprint and is determined by the Point Spread Function (PSF) which is a two-dimensional, bell-shaped function that defines the CERES instrument response to the viewed radiation field. The resolution of the CERES radiometers is usually referenced to the optical FOV which is 1.3° in the along-track direction and 2.6° in the cross-track direction. The CERES FOV or footprint size is referenced to an oval area that represents approximately 95% of the PSF response. Since the PSF is defined in angular space at the instrument, the CERES FOV is a constant in angular space, but grows in surface area from a minimum at nadir to a larger area at shallow viewing angles.

Post Reply