Assessing Planet Nanosatellite Sensors for Ocean Color Usage

Author:

Lewis Mark D.1,Jarreau Brittney1,Jolliff Jason1ORCID,Ladner Sherwin1,Lawson Timothy A.1,McCarthy Sean1,Martinolich Paul2,Montes Marcos3ORCID

Affiliation:

1. Naval Research Laboratory, Building 1009, Stennis Space Center, MS 39529, USA

2. Peraton, Building 1103, Stennis Space Center, MS 39529, USA

3. Naval Research Laboratory, Building 2, Washington, DC 20375, USA

Abstract

An increasing number of commercial nanosatellite-based Earth-observing sensors are providing high-resolution images for much of the coastal ocean region. Traditionally, to improve the accuracy of normalized water-leaving radiance (nLw) estimates, sensor gains are computed using in-orbit vicarious calibration methods. The initial series of Planet nanosatellite sensors were primarily designed for land applications and are missing a second near-infrared band, which is typically used in selecting aerosol models for atmospheric correction over oceanographic regions. This study focuses on the vicarious calibration of Planet sensors and the duplication of its red band for use in both the aerosol model selection process and as input to bio-optical ocean product algorithms. Error measurements show the calibration performed well at the Marine Optical Buoy location near Lanai, Hawaii. Further validation was performed using in situ data from the Aerosol Robotic Network—Ocean Color platform in the northern Adriatic Sea. Bio-optical ocean color products were generated and compared with products from the Visual Infrared Imaging Radiometric Suite sensor. This approach for sensor gain generation and usage proved effective in increasing the accuracy of nLw measurements for bio-optical ocean product algorithms.

Funder

Office of Naval Research

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

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