Slides from the second SPOT (Take 5) Workshop

Voici les présentations des Journées SPOT4 (Take5) du 18 et 19 novembre 2014.  Cette réunion a réuni une centaine de personnes au CNES pour faire un bilan des acquisitions et des produits distribués, prendre connaissance des travaux et résultats des utilisateurs et obtenir un retour d'expérience.
J'en profite pour remercier chaleureusement les deux organisatrices, Sylvia Sylvander et Danielle Barrère, du CNES (DCT/ME/OT), ainsi que les 23 orateurs qui nous ont proposé de brillantes présentations.


Here are the presentations from SPOT4 (Take5) users day on November 18th and 19th 2014. Around 100 people attended this meeting at CNES, which aimed at making an assessment of the acquisitions and products, show the users studies and results and obtain their feedback.
I would like to thank a lot the organisers, Sylvia Sylvander and Danielle Barrère from CNES, and the 23 speakers, who gave us amazing talks.

The table below gives access to all the slides.


S. Sylvander CNES Introduction
S. Sylvander CNES Preparation and progress of SPOT4 (Take5) experiment
O.Hagolle CESBIO/CNES SPOT4 (Take5) validation, users feedback and lessons learned
M.Kadiri CESBIO Definition, test evaluation of a monthly composite product for Sentinel-2 based on SPOT4 (Take5) data
M.Claverie U. Maryland / NASA An update on the LANDSAT8/Sentinel-2 merged reflectance product project
M.Le Page CESBIO SAT-IRR : Satellite for irrigation scheduling
V.Simonneaux CESBIO Water budget monitoring of irrigated perimeters in semi-arid areas using high resolution NDVI image time series
O.Arino ESA ESA Studies: Agriculture, Forest, Wetland, Costal Water. Preparing for Sentinel-2
M.El-Hajj TETIS/IRSTEA Estimation of soil moisture using radar and optical images over Grassland areas
J.Inglada CESBIO Automatic land-cover map production of
agricultural areas using supervised classification of SPOT4(Take5) and Landsat-8 image time series
S.Valero CESBIO Real-time crop mask production using high-spatial-temporal resolution image times series
D.Morin CESBIO Estimation of biophysical variables and cartography of irrigated surfaces with high temporal and spatial resolution images
W.Li INRA Avignon Deriving ECVs GAI and FAPAR from SPOT4 and LANDSAT8 sensors: evaluation of the consistency and comparison with ground measurements
A.Roumiguié Dynafor/EI-Purpan Forage production monitoring
C.Jacqueminet EVS-ISTHME, U. Saint-Etienne
Discrimination of herbaceous habitats using multitemporal Spot and Landsat images (Massif central – France)
V.Gond CIRAD Phenological monitoring of tropical forest ecosystems in the North of Congo
A.Verhegghen JRC Assessing Forest Degradation in the tropics using Time Series of Fine Spatial Resolution Imagery
M.Szulkin CEFE-CNRS Inferring blue tit reproductive phenology using SPOT4 imagery
S.Sylvander / O.Arino ESA SPOT5(Take5) Operations in 2015
J.P.Dedieu LTHE / CNRS Snow cover monitoring in the French Alps physical properties of surface snow, snow cover dynamics impact on vegetation
A.Facello IRPI-CNR (Italy) Snow Water Equivalent and Slope Movements from Satellite Data: potential of space-borne observations with high spatial and temporal sampling. Case study: Tena Valley (Central Pyrenees, Spain)
S.Cerisier GIP Loire-Estuaire Remote sensing data with high repetitivity : a contribution to coastal and estuarine processes knowledge
V.Lafon Geo-Transfert / EPOC, U. Bordeaux
SPOT4 (Take5) Experiment: simulation of Sentinel-2 time-series to monitor the maximum turbidity zone of tidal estuaries

L'appel à proposition de sites pour SPOT5 (TAKE5) est sorti !

Voici deux excellentes nouvelles pour ceux d'entre vous qui souhaiteraient proposer un site pour l'expérience SPOT5 (Take5):


  • Le projet SPOT5 (TAKE5) est maintenant complètement décidé par l'ESA et le CNES, grâce à l'approbation récente par le Program Board on Earth Observation de l'ESA, et après le feu vert donné par le CNES il y a quelques semaines. Les données seront acquises d'Avril à Août 2015.
  • L'appel à propositions de sites pour SPOT5 (Take5) vient aussi d'être lancé par l'ESA. Comme je vous l'avais dit, le délai de réponse est très court : les réponses sont attendues pour le 8 Décembre ! Avant de soumettre un site à l'ESA, vérifiez si celui-ci figure dans  la liste des sites sélectionnés par l'ESA pour ses propres projets, ou parmi la liste des sites choisis par le CNES (voir l'illustration). Même si c'est le cas, l'ESA recommande de soumettre une proposition, pour donner à votre site une priorité plus importante au cas où pour une raison technique, il faudrait choisir entre ce site et un site voisin.


12 Sites already selected by CNES for its own projects

SPOT5 (TAKE5) call for sites is out

Two good pieces of news for those of you who would like to submit a site for SPOT5 (TAKE5):


  • The SPOT5 (TAKE5) project is now fully approved by ESA and CNES, thanks to the recent approbation by ESA's Program Board on Earth Observation, and after CNES green light signal. Data will be acquired from April to August 2015.
  • SPOT5 (Take5) call for sites has been issued by ESA. As I told you before, the deadline is very close : December 8th ! Before submitting a site, please check if it is not in the list of sites already selected by ESA for their own projects, or among the sites selected by CNES (see illustration). However, ESA advises that even if your site is on ESA's list, it is better to submit a proposal, to add extra priority to the site in case of a technical conflict between neighbouring sites.

12 Sites already selected by CNES for its own projects

[SPOT5 (Take5)] Ready, Steady... / A vos marques, prêts...

LANDSAT and Sentinel-2 are programs in the long run, while the SPOT (Take5) experiments are sprints. The mission decision is always taken very close to the start of the experiment, and everything must go fast. Users who want to submit a site must be fit and ready : I have seen a draft of ESA's call for sites for SPOT5 (Take5), its release is imminent, and the reply deadline will be very close.


Les projets LANDSAT et Sentinel-2 s'apparentent à des courses de fond, mais les expériences SPOT (Take5) sont des sprints. La décision de l'expérience est toujours prise peu avant son démarrage : tout doit donc se dérouler très vite. Les utilisateurs qui veulent participer à la course doivent donc se tenir prêts ; j'ai vu un brouillon de l'appel à proposition de sites pour SPOT5 (Take5), sa sortie est imminente, et le délai de réponse sera très court.

New papers using SPOT4 (Take5) data

Here are two new papers that used SPOT4 (Take5), data to monitor irrigation, both in Morocco. The second one in the list below had already been described in this blog :

Please remember that we are preparing a special issue on SPOT4 (Take5) in remote sensing journal, deadline is February 28th.


Voici deux nouveaux papiers utilisant SPOT4 (Take5) pour suivre l'irrigation au Maroc. Les résultats du second article avaient déjà été décrits dans ce blog.

N'oubliez pas que nous préparons un numéro special du journal remote sensing sur SPOT4 (Take5). La date limite pour soumette un papier est le 28 février.


The good things with Sunday work


I am not the kind of person to give lessons or to blame my colleagues, but I have to tell that some of them do not work on Sundays. And their excuses are variable and numerous : family, errands, work in the flat/house or in the garden, the necessity to rest from stressful weeks, do some sports, see friends...


Without meaning to boast, I know how to help you solve these issues that could prevent you to work on Sundays

  • a reason to delay the errands or the garden work to another day ("I have no choice, that's for work")
  • A way to do sports and  to relax
  • A reason to see friends or family  (to teach them how to work on Sundays)


OK, I'll give you my secret :

Moorland with broom shrubs

Mountain meadow

Woody crop (vineyard)

- thanks to the nice autumn in France, and thanks to the ODK* Collect android application, that you may download on Google Play, It was my pleasure to work on the last two week-end. More accurately, I worked at sampling land cover.


15 days ago, I spent my Sunday sampling moorlands in the Pyrenees, thanks to a very nice hike near Tarascon sur Ariège. all types of mountain moors were present, with either ferns, brooms, rhododendrons, blueberries or juniper.

The next week-end allowed me to sample Mediterranean vegetation, and its transition to mountain vegetation in the Fenouillèdes region, at the foot or the Eastern Pyrenees, thanks to a lovely bike tour. Bike is a very efficient way of collecting samples, and it is also an excuse to stop every half mile when the slope is too steep. I tend to sample much more places when going up rather than going down.


At the end of the hike, the data are transfered on a websites that comes with ODK and they will be soon transferred to the CESBIO PostGIS data (Thanks to Jérôme Cros) to finally be used, along with other data sources to train and validate land cover classifications.

Alfalfa meadow


As I did work a lot on Sundays, I have collected about 2000 samples in 18 months that I'd like to release as open data.


A start for a European data base for landcoverl

If you'd like to enjoy working on sundays, please do. adding more users would be a way to provide data to our project to provide annual land cover over France, or to help our Sen2Agri project, with Sentinel-2, starting next year.

If you want to see the data, or to start collecting data, you may use this site, I created a guest account "invite", and the password is composed of the account name followed by the name of my lab, without any space or capital letter. The most recent samples are in OS V2.3 form. If you want to collect data, ask me for a personal account. There is a user guide here.

* ODK : Open Data Kit