• hypstar-eyes
  • firstbatch2
  • firstbatch5
  • firstabatch6
  • HYPSTAR-SR_on_field
  • firstbatch1

Project brochure

User demo video

HYPSTAR® (HYperspectral Pointable System for Terrestrial and Aquatic Radiometry) is an autonomous hyperspectral radiometer system dedicated to surface reflectance validation of all optical Copernicus satellite data products. HYPSTAR takes radiance and irradiance measurements.

A HYPSTAR system integrates an innovative hyperspectral VNIR spectrometer and an optional additional SWIR spectrometer, a simple RGB imaging camera alongside hyperspectral measurements, a relative calibration LED source (under development), a pan-tilt mechanism, auxiliary sensors (pressure, humidity, temperature, rain, light, two external cameras), site-dependent accessories (designed mounting frames, carry cases, fixations, designed from commercial off-the-shelf equipment, etc.) and a standardized data stream for easy and systematic exploitation by downstream validation networks WATERHYPERNETS and RADCALNET.

Once operated on the fields, the HYPSTAR systems are integrated into the WATERHYPERNETS or RADCALNET, the worldwide federated networks of autonomous spectroradiometer systems dedicated to satellite validation or may be operated independently. The networks automatically acquire measurements from the sites in near real-time, do magic, and provide the result data with associated uncertainties evaluated according to ISO/GUM. The uncertainty estimation closely follows the work of the FRM4SOC and FRM4VEG projects, where our HYPSTAR scientists are coordinators and partners.

HYPSTAR has 2 versions: HYPSTAR-SR (Standard Range) for deployments on water sites, and HYPSTAR-XR (eXtended Range) for deployments on land sites. The systems are designed and tested for diverse and challenging conditions as regards application (water, land), platform (fixed structure, research crane), environment (cold/ hot, wet/ dry, calm/ windy, biofouling, etc.), and logistics (accessible/ remote, standalone/ heavily instrument site, well-protected/ vulnerable to humans, etc.).

4 HYPSTAR-SR prototypes have been tested at Blankaart (Belgium), Étang de Berre (France), Acqua Alta Oceanographic Tower (Italy), and Río de la Plata (Argentina). 3 HYPSTAR-XR have been tested at Demmin (Germany), Tõravere (Estonia), and Wytham Woods (The UK) during the H2020/HYPERNETS project. The prototypes started operating and collecting meaningful data in 2021.

Testing will be expanded in 2022 when 24 refined HYPSTAR systems (12 HYPSTAR-SR and 12 HYPSTAR-XR) will be deployed by our partners with public distribution of data in near real-time for the validation of Sentinel-2A/B, Sentinel-3A/B, Landsat-8, Landsat-9, MODIS AQUA, and TERRA, VIIRS, PROBA-V, CHRIS-PROBA, ENMAP, Pléiades, nanosats, and cubesats, etc.

Our partners occasionally post news on these deployments on Twitter @Hypernets_H2020. Make sure you follow us.

Commercialized versions of the HYPSTAR systems will be available for orders in early 2023.

HYPSTAR-SR

The HYPSTAR-SR prototype tested by our partner Laboratoire d'Océanographie de Villefranche, Sorbonne University on the field at Étang de Berre, 2021

 

The HYPSTAR-SR (Standard Range) system is specially designed for radiometric validation of "water colour" satellites. The systems have been tested on water sites with diverse conditions (offshore, coastal and inland water) within the H2020/HYPERNETS project.

Data will be provided from sites to the WATERHYPERNET network daily, processed, and distributed with associated uncertainties evaluated according to ISO/GUM.

The system is fully characterized and calibrated from factory.

Technical specifications:

Parameter HYPSTAR-SR radiometer
Measured quantity Radiance and irradiance (multiplexed)
Field of view 2° (radiance), 180° (irradiance)
Detector array 2048 px Si
Spectral range 380 … 1020 nm
Spectral sampling interval 0.5 nm
Spectral resolution 3 nm
ADC resolution 16 bit
Integration time 1...65535 ms
Shutter Internal
Target camera 5 Mpx, RGB
Communication interface RS485, half duplex, 115.2 … 8000 kbps
Housing material Anodised marine grade aluminium
Dimensions (DxL) ⌀110.3 x 267 mm
Weight 1.5 kg
Power supply 8 … 18 V DC, 0.5 A
Environmental protection IP67
Operating temperature -25 … +45 °C
Storage temperature -35 … +70 °C

HYPSTAR-XR

hypstar-2

 

The HYPSTAR-XR system (eXtended Range) is specially designed for radiometric validation of "land" satellites. The systems have been tested in deserts, snow/ice fields, and vegetated lands (e.g. woodland, agricultural, tropical forests, mixed surfaces) within the H2020/HYPERNETS project.

Data are provided from sites to the RADVALNET network daily, processed, and distributed with associated uncertainties evaluated according to ISO/GUM.

The system is fully characterized and calibrated from factory.

Technical specifications:

Parameter HYPSTAR-XR radiometer
Measured quantity Radiance and irradiance (multiplexed)
Field of view 5° (radiance), 180° (irradiance)
Detector array 2048 px Si, 256 px InGaAs
Spectral range 380 … 1700 nm
Spectral sampling interval 0.5 nm (VNIR), 3 nm (SWIR)
Spectral resolution 3 nm (VNIR), 10 nm (SWIR)
ADC resolution 16 bit
Integration time 1...65535 ms
Shutter Internal
Target camera 5 Mpx, RGB
Communication interface RS485, half duplex, 115.2 … 8000 kbps
Housing material Anodised marine grade aluminium
Dimensions (DxL) ⌀110.3 x 434 mm
Weight 3 kg
Power supply 8 … 18 V DC, 2 A
Environmental protection IP67
Operating temperature -25 … +45 °C
Storage temperature -35 … +70 °C

Our startup team

 

Joel Kuusk
Associate Professor, Tartu Observatory
 
Kaspars Laizans
Senior engineer, Tartu Observatory
 
Ken Flight
Mechatronics engineer, Tartu Observatory
 
Kim Duong
Business and innovation manager, Tartu Observatory

 

Our partners

 

 

Last updated: 23-Oct-2021

EU flag

Development of the HYPSTAR radiometer was funded by the European Union’s Horizon 2020 research and innovation program under Grant agreement No. 775983 ("HYPERNETS project").