SEA SURFACE SALINITY FROM A CUBESAT WITH NOVEL SPATIAL LIGHT MODULATOR IMAGING SYSTEM
Abstract
We will develop and test a pushbroom-type hyperspectral CubeSat SLM Imager (CSI) for measuring passive reflectance in the UV and VIS domains to derive sea surface salinity. Theimager will use novel optical acquisition hardware architecture employing a Digital Micromirror Device coupled to a single, high dynamic range detector. CSI spectral range will cover 300 to 600 nm, suitable for deriving CDOM absorption and salinity from published algorithms (Table 1; section 4). Atmospheric correction will be carried out using a black pixel assumption in the far UV and by using reflectance data from the near-IR collected by a companion CubeSat imager already in development (section 4). In Year 2, we expect to employ a 2560x1600 DMD, with spatial resolutions as fine as 20 m pixel-equivalent footprint over 50 km swath, and 1600 individual bands available in the spectral dimension (section 3.7). Cookbook adaptation (section 3.3) will be used to optimize spatial and spectral resolution to achieve SNR thresholds, dependent on the characteristics of a given scene (e.g., relative brightness). Partner SSC Pacific will develop our satellite operations program plan (section 5).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 15, 2019
- Source ID
- N000141912504
Entities
People
- Mike Twardowski
Organizations
- Florida Atlantic University
- Office of Naval Research
- United States Navy