Minimize Proba-V

The Proba-V menu to your right provide information concerning the SPPA activities for this mission. 

 

A brief description of the mission, its operations and main mission highlights is available in the sections below:

Mission and Sensor Description   |    Sensor Modes   |   Mission Operations Overview     
Minimize Mission and Sensor Description

The main PROBA-V payload is the Vegetation sensor: a multispectral pushbroom spectrometer with 4 spectral bands and with a very large swath of 2285 km to guarantee daily coverage above 35° latitude.

The payload consists of 3 identical cameras, each with a very compact Three Mirror Anastigmat (TMA) telescope. Each TMA, having a FOV of 34°, contains 4 spectral bands: 3 bands in the visible range (Blue, Red and NIR) and one band in the SWIR spectral range. The swath Total FOV is 103°. VGT-P is restricted to imaging land and dedicated calibration zones. On-board the spacecraft, there is for each camera a land sea mask that allow to remove the pixels that contain only sea and it dictates when each camera should be in imaging mode.

An illustration of the PROBA-V platform and a table summarising the main instrument parameters of the Vegetation instrument, compared to its predecessor (SPOT-VGT) are provided here below.

The reference scientific paper providing description of the PROBA-V Space Segment is available here for download:

 

Illustration of the PROBA-V spacecraft in orbit (image credit: ESA)
 

 

Parameter

Vegetation (SPOT series)

VGT-P (Vegetation on PROBA-V)

Mass of instrument

152 kg

33 kg (with margin)

Volume

1.0 m x 1.0 m x 0.7 m

0.81 m x 0.2 m x 0.35 m

Swath

2250 km

2285 km

GSD at nadir

1165 m

100 m (VNIR), 200 m (SWIR)

GSD at edge of the swath

1700 m

360 (VNIR), 690 (SWIR)

MTF at GSD

0.3

0.3

Spectral bands
Blue
Red
NIR
SWIR


450 nm, FWHM: 42 nm
645 nm, FWHM: 70 nm
834 nm, FWHM: 121 nm
1665 nm, FWHM: 89 nm


460 nm, FWHM: 42 nm
CWL 658 nm, FWHM: 82 nm
834 nm, FWHM: 121 nm
1610 nm, FWHM: 89 nm

SNR at L2 (W m-2 sr-1 µm-1)
Blue (L2=111)
Red (L2=110)
NIR (L2=106)
SWIR (L2=20)

1 km product
188
333
393
333

300 m product
502
597
611
405 (600 m product)

Geolocation accuracy
Absolute
Multitemporal
Multispectral


300 m
500 m
1000 m


300 m
300 m
300 m

Power

< 200 W

43.2 W

 
PROBA-V Vegetation sensor parameters in comparison to SPOT Vegetations sensors (Ref. 16)

 

 

Minimize Mission Requirements

The main mission requirements of PROBA-V remote-sensing satellite are:

  • Data and service continuity: filling the gap between SPOT-VGT and the Sentinel-3 mission, with spectral and radiometric performance identical or better than SPOT-VGT
  • Spatial resolution: 1 km mandatory, improved Ground Sampling Distance (GSD) is highly desirable: 300 m (VNIR bands), 600 m (SWIR band). Image quality and geometric accuracy, equal to or better than SPOT-VGT
  • Provision of daily global coverage of the land masses in the latitudes 35° and 75° North and in the latitudes between 35° and 56° South, with a 90% daily coverage of equatorial zones - and 100% two-daily imaging, during day time, of the land masses in the latitudes between 35° North and 35° South..
Additional details on Proba-V Mission Requirements can be found in the MRD.

PROBA-V principally addresses key observations in the following application domains:
  • General land use in relation to vegetation cover and its changes
  • Vegetation behavior to strong meteorological events (severe droughts) and climate changes (long-term behavior of the vegetation cover)
  • Disaster management (detection of burnt areas and water bodies)
  • Biophysical parameters for model input devoted to water budgets and primary productivity (agriculture, ecosystem vulnerability, etc.).