SPOT 4

Mission

Catching the world in a box
The rapid evolution of Egypt's Nile Delta over the last four years, as viewed from ESA's Proba-V microsatellite.

blue arrow Mission Overview

SPOT 4 (Satellite pour l'Observation de la Terre) was a commercial Earth-imaging satellite from CNES in France. It was launched on 24 March 1998 and ceased operations after a malfunction on 29 June 2013.

SPOT 4 Mission Parameters
Orbit Height 832 km
Orbit Type Sun-synchronous circular
Orbit Inclination 98.7°
Orbit Duration 101 mins
Repeat Cycle 26 days

blue arrow Mission Objectives

SPOT 4, like all the SPOT missions, was aimed at supplying high-resolution, wide-area optical imagery. This was designed to improve the knowledge and management of Earth's resources, detecting and forecasting phenomena involving climatology and oceanography, and monitoring human activities and natural phenomena.

blue arrow Instruments

High-Resolution Visible and InfraRed (HRVIR)

With respect to the HRV instrument on board SPOT 1, 2 and 3 the HRVIR had the same geometric imaging characteristics but improved performance was achieved by adding a new shortwave infrared spectral band (SWIR).

Two identical HRVIR  imaging instruments on SPOT 4 were able to operate in two modes either simultaniously or individually.

The HRVIR had an oblique viewing capability of 27° on each side of the local vertical.The swath was 117 km2 if both sensors were used simultaniously with a 3km2 overlap

HRVIR Instrument Details
Type High-resolution optical pushbroom imager
Ground Sample Distance Panchromatic: 10 m
Multispectral: 20 m
Swath Width 60 km
Bands Monospectral (PAN)
Green
Red
NIR (Near Infrared)
SWIR
0.61-0.68 µm
0.50-0.59 µm
0.61-0.68 µm
0.79-0.89 µm
1.53 - 1.75µm
Instrument Field of View 4.13°
Ground Sampling Interval (Nadir Viewing) Panchromatic:10 m x 10 m
Multispectral:20 m x 20 m
Pixel per Line Panchromatic:6000
Multispectral:3000
Swath Width) 60 km

 

Other instruments

The VEGETATION instrument was carried on SPOT 4 and onward. It acts independently of the HRVIR (Visible & Infrared High-Resolution) sensors. This instrument can cover almost all Earth’s surface in a day because of its swath size of 2250 km. It captures reflected light in four spectral bands (blue, red, near-infrared, and middle-infrared).

blue arrow Data

blue arrow DATA DOWNLOAD

Download data from SPOT-4 mission through the ESA TPM Online Dissemination system. The data is freely available to registered EO-SSO users.

 

Download SPOT 4-5 Sentinel-2 Take-5 data throught the CNES SPOT Take 5 Portal The data is freely available to registered users

blue arrow DATA DESCRIPTION

Registered users are allowed access to the SPOT-1 to 5 ESA archive through the online dissmination server. The archive consists mainly of imagery over Europe and Africa that ESA has collected through the years along with worldwide coverage.

  • SPOT 1 - SPOT 5 ESA archive: SPOT 1 to 5 products, mainly focused in Europe and Africa that ESA collected over the years with worldwide coverage.