Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

Main Menu

· Home
· Contacts
· Data Systems
· Documents
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference


Register of Resources (RoR)

 People  |  Datasets  |  Literature  |  Institutes  |  Projects 

[ report an error in this record ]basket (0): add | show Print this page

The Pan-and-Tilt Hyperspectral Radiometer system (PANTHYR) for autonomous satellite validation measurements—prototype design and testing
Vansteenwegen, D.; Ruddick, K.; Cattrijsse, D.; Vanhellemont, Q.; Beck, M. (2019). The Pan-and-Tilt Hyperspectral Radiometer system (PANTHYR) for autonomous satellite validation measurements—prototype design and testing. Remote Sens. 11(11): 1360.
In: Remote Sensing. MDPI: Basel. ISSN 2072-4292; e-ISSN 2072-4292
Peer reviewed article  

Available in  Authors 

Author keywords
    Hyperspectral reflectance; validation; autonomous measurements; ground-truth data; system design

Authors  Top 
  • Vansteenwegen, D.
  • Ruddick, K.
  • Cattrijsse, D.
  • Vanhellemont, Q.
  • Beck, M.

    This paper describes a system, named “pan-and-tilt hyperspectral radiometer system” (PANTHYR) that is designed for autonomous measurement of hyperspectral water reflectance. The system is suitable for deployment in diverse locations (including offshore platforms) for the validation of water reflectance derived from any satellite mission with visible and/or near-infrared spectral bands (400–900 nm). Key user requirements include reliable autonomous operation at remote sites without grid power or cabled internet and only limited maintenance (1–2 times per year), flexible zenith and azimuth pointing, modularity to adapt to future evolution of components and different sites (power, data transmission, and mounting possibilities), and moderate hardware acquisition cost. PANTHYR consists of two commercial off-the-shelf (COTS) hyperspectral radiometers, mounted on a COTS pan-and-tilt pointing system, controlled by a single-board-computer and associated custom-designed electronics which provide power, pointing instructions, and data archiving and transmission. The variable zenith pointing improves protection of sensors which are parked downward when not measuring, and it allows for use of a single radiance sensor for both sky and water viewing. The latter gives cost reduction for radiometer purchase, as well as reduction of uncertainties associated with radiometer spectral and radiometric differences for comparable two-radiance-sensor systems. The system is designed so that hardware and software upgrades or changes are easy to implement. In this paper, the system design requirements and choices are described, including details of the electronics, hardware, and software. A prototype test on the Acqua Alta Oceanographic Tower (near Venice, Italy) is described, including comparison of the PANTHYR system data with two other established systems: the multispectral autonomous AERONET-OC data and a manually deployed three-sensor hyperspectral system. The test established that high-quality hyperspectral data for water reflectance can be acquired autonomously with this system. Lessons learned from the prototype testing are described, and the future perspectives for the hardware and software development are outlined.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors 

If any information here appears to be incorrect, please contact us
Back to Register of Resources
Quick links


Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)

Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca

part of WoRMS logo

ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin


Geographic System



Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact