Pleiades INSTRUMENTS

Explore instruments used in Pleiades mission.

EXPLORE INSTRUMENTS

Pleiades DATA

Pleiades data is freely and openly available to everyone.

ACCESS MISSION DATA

The Pleiades programme followed the SPOT programme satellite series, introducing advanced technologies in Earth observation.

About Pleiades

Pleaides Satellite

 

Pleaides Satellite

Pléiades is an environment-focused constellation (consisting of two satellites, referred to as 1A and 1B) from CNES of France, which were launched on 17 December 2011 (Pleiades 1A) and 2 December 2012 (Pleiades 1B). The constellation remains operational.

 

Mission Parameters
Orbit Height 694km
Orbit Type Sun-synchronous
Repeat Cycle 26 days

Pleiades Objectives

The Pléiades system is designed for a range of very-high-resolution (VHR) remote sensing applications in the field of cartography, agriculture, forestry, hydrology, and geological prospecting.

Pleiades Instruments

High Resolution Imager

The High Resolution Imager (HiRI) on board the Pléiades constellation delivers very-high optical resolution (0.5m resolution) with a swath of 20 km.

 

HiRI Instrument Parameters

Spectral bands

Pan: 480-820 nm; TDI is only used for Pan data
MS bands in nm
B0= 450-530 (blue),
B1= 510-590 (green),
B2= 620-700 (red),
B3= 775-915 (NIR)

Optical system

65 cm aperture diameter, focal length of 12.905 m, f/20, TMA optics

Spatial resolution, GSD

0.5 m for Pan, 2 m for MS bands

Swath width, FOR

20 km at nadir, 60º (FOR=Field of Regard); Each satellite will be able to collect imagery anywhere within an
800 km wide ground strip, covering 200 km in 11 s or 800 km in 25 s, including stabilization time.

SNR

> 147 (Pan), > 130 (MS)

MTF in Pan band

0.07 at Nyquist frequency fe/2 (1/2 x 0.7 m-1) Note: "fe" is the sampling frequency (fréquence d'échantillonnage)

Detectors

Pan array assembly: 5 x 6000 (30,000 pixels cross-track) pixel size: 13 µm
MS array assembly: 5 x 1500 (7500 pixels in cross-track) pixel size: 52 µm

TDI detector data rate

290 Mpixel/s (total) or about 700 Mbit/s per detector; or 3.5 Mbit/s (max)

Data quantization

12 bit per pixel (correlated dual sampling)

Image location accuracy

1 m (with ground control points), 20 m without GCP (99.7%), 10 m (90%)

Image location accuracy

<0.9 pixel Pan over 12 s with a time linear error model (with GCPs)

Line-of-sight frequency

<0.1 pixel (dynamic stability)

Source data rate, downlink

4.5 Gbit/s (max), 465 Mbit/s in 3 x 155 Mbit/s X-band channels

Data compression

Wavelet compression algorithm with an average compression factor of 4

Instrument mass, power

~ 195 kg (< 14 service electronics), ~ 400 W

Instrument size

L < 1594 mm
W < 980 mm
H < 2235 mm

Pointing agility of S/C

Roll of 60º within 25 s; Pitch of 60º within 25 s

Pleiades Data

DATA DOWNLOAD

Download data from the Pleiades missions through the ESA TPM Online Dissemination system. The data is freely available to registered EO Sign In users.

DATA DESCRIPTION

ESA is offering, for scientific research and application development, access to Full archive and New Tasking data from Pleiades mission upon submission and acceptance of project proposal. These products are available as part of the Deimos Imagery.

ESA will support as many high-quality and innovative projects as possible within the quota limit available, therefore only a limited amount of products can be made available to each project

Following collection is available:

Moreover, ESA offers to registered user the access through the Online Dissemination server to the following data collections

  • Pleaides ESA archive: Primary and Ortho products that ESA collected over the years. The dataset regularly grows as ESA collects new products.
 
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