USGS releases LANDSAT 8 data corrected from atmospheric effects

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Since Christmas (almost, December 23rd), USGS distributes LANDSAT 8 data corrected from atmospheric effects, as they already did for LANDSAT 5 and 7. These data have been long awaited and will be very useful.

 

Of course, USGS processing addresses the whole world. To access these products, you should use the earthexplorer.server. You will find the data by clicking on LANDSAT_CDR, as shown in the image on the right. You will have to order for their processing before being able to download them. Usually this processing is very quick.

 

We did not yet compare the USGS products developed by NASA (E.Vermote) with our Level 2A LANDAT 8 data acquired over France and produced and distributed by THEIA with CESBIO processor, but we will work into it shortly.

 

2015

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Dear reader,  may 2015 bring you health and happyness !


2015 should be a great year for the time series of optical images at a high resolution, with the launch of Sentinel 2A in Mat, in less than four months ! We have been waiting for it for so long that we can hardly believe it will be launched so soon. And to help you wait until then. SPOT5 orbit will be changed, to observe a hundred of sites with a 5 day repetitivity similar to that of Sentinel-2, until the end of August.

 

This post is also an opportunity to recall what was achieved in 2014 :

  • In February, we started the Sen2Agri project for l'ESA, with our partners, UCL, CS-SI France and CS-SI Romania. This project which is keeping us busy busy aims at producing a system for automatic classification of crops at the scale of whole countries.
  • In March, THEIA released a new version of SPOT4 (Take5) data, in particular with an enhanced geometrical superposition. This data set has now been downloaded by more than 600 users.
  • In May, the production in near real time (with a delay of 15 to 20 days) of LANDSAT 8 L2A products over France started (this type of product is still not available at USGS, but not for long, I guess...), followed by the processing of de 3 years of LANDSAT 5 & 7 data. 5 years of data, from 2009 to 2014, with an interruption in 2012, after LANDSAT 5 end of life and before LANDSAT 8 launch.
  • In September, CNES finally decided to launch SPOT5 (Take5) experiment,  thanks to a large contribution from ESA. The call for sites proposal was launched by ESA in November, and was largely successful, with 62 proposals for a hundred of sites. The analysis of this proposal is now on-going, and the choice will be difficult as the proposed applications are rich and very diverse.
  • In September too, CESBIO hosted the meeting of THEIA Scientific Expertise Centres, which allowed to identify about 20 products that the centre could prepare in the coming years. These products are described in the recent THEIA bulletin (in French).
  • In November, CNES hosted the SPOT4 (Take5) users meeting, to summarize data use, with a hundred of participants and  23 excellent presentations of the applications allowed by the experiment.
  • In December, we finally launched the call for sites proposal for Venµs mission, which will be launched in 2016. The deadline is January the 28th, 2015.

 

We will have several topics to comment for this blog that starts its third year, with a large audience : it received 23000 visits, and 47000 pages were read, a 50 % increase compared to last year. These weeks, it is getting harder for me to maintain a rhythm of a post per week that I tried to keep in the first two years. Contributions of data users are welcome !

In white, the countries from which no visit was observed in 2014 (Ouganda, Afghanistan)

Liste of the 10 countries from which the most frequent visits are observed.

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

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

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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

Demandez le programme des journées SPOT4 (Take5) au CNES

Voici le programme des journées SPOT4 (Take5) des 18 et 19 novembreembre.
Nous acceptons encore des inscriptions, mais ne tardez pas trop à écrire à sylvia.sylvander@cnes.fr ou danielle.barrere@cnes.fr

Here is the agenda for the SPOT4 (Take5) days of November the 18th and 19th. We still accept new inscriptions, but do it quickly by sending an email to sylvia.sylvander@cnes.fr or danielle.barrere@cnes.fr. Alll the slides will be in English, but some talks will probably be in French.

Tuesday 18th November
Time Duration Name Organism Title
8h45


Welcome
9h30 10'
CNES Introduction
9h40 20' S. Sylvander CNES Preparation and progress of Take 5 experiment
10h00 25'+5' O. Hagolle CNES/CESBIO Level 2A Validation and user feedback
10h30 20' + 5' M. Kadiri CESBIO Definition, test and evaluation of a monthly composite product for Sentinel-2, based on SPOT4 (Take5)
10h55 30'

Coffee break
11h25 20' + 5' M. Claverie NASA GSFC An update on the Landsat / Sentinel-2 merged Surface Reflectance product project
11h50 20' + 5' M. Le Page CESBIO SAT-IRR, a web service to help with irrigation decision based on time series of satellite images of high spatial and temporal resolution
12h15 20' + 5' V. Simonneaux CESBIO/IRD Water budget monitoring of irrigated perimeters in semi-arid areas using high resolution NDVI image time series. Application for the assessment of groundwater extraction.
12h40


Lunch break
14h00 25'+5' O. Arino ESA Résultats des études ESA
14h30 20' + 5' N. Baghdadi Maison Télédétection TBD
14h55 20' + 5' J. Inglada CNES/CESBIO Automatic land-cover map production of agricultural areas using supervised classification of SPOT4(Take5) and Landsat8 image time series. Algorithm comparison over 12 sites for Sentinel-2 Agriculture Project.
15h20 20' + 5' S. Valero CESBIO Real time production of a crop mask using high spatial and temporal resolution time series.
15h45 20' + 5' D. Morin CESBIO Cartography of irrigated crops and estimation of biophysical variables with high temporal and spatial resolution images
16h10 30'

Coffee Break
16h40 20' + 5' W. Li INRA PACA Deriving ECVs LAI and FAPAR from SPOT and LANDSAT sensors:Evaludation of the consistency and comparison with ground measurements
17h05 20' + 5' A. Roumiguié Ecole d'ingénieurs de Purpan Validation of a Forage Production Index derived from MODIS fCover time series - Methodology and main results
17h30 20' + 5' C. Jacqueminet Univ. St Etienne Discrimination of herbaceous habitats using multi-temporal Spot and Landsat images (Massif central (France))















Wednesday 19th November
Time Duration Name Organism Title
8h30


Welcome
9h00 20' + 5' JF. Bolot CIRAD Caractérisation de la phénologie des forêts du nord-Congo avec l'utilisation des données Spot-4 (Take-5)
9h25 20' + 5' A. Verhegghen JRC Assessing Forest Degradation in the tropics using Time Series of Fine Spatial Resolution Imagery
9h50 20' + 5' M. Szulkin CEFE CNRS Montpellier Inferring blue tit (Cyanistes caeruleus) reproductive phenology using SPOT4 imagery
10h15 30' S. Sylvander/O. Arino CNES/ESA SPOT5/Take5 operation in 2015
10h45 30'

Coffee break
11h15 20' + 5' JP. Dedieu Univ. Grenoble SPAMN : Spot pour le suivi Alpin du manteau Neigeux. Résultats et bilan.
11h40 20' + 5' A. Facello IRPI Turin 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).
12h05 20' + 5' S. Cerisier GIP Loire Estuaire Remote sensing data with high repetitivity : a contribution to coastal and estuarine processes knowledge
12h30 20' + 5' V.Lafon Univ. Bordeaux SPOT4 (Take5) Experiment: simulation of Sentinel-2 time-series to monitor the maximum turbidity zone of tidal estuaries
12h55 20' + 5'

Questions/Answers

Premier article utilisant SPOT4 (Take5). SPOT4 (Take5) first article.

As far as I know, here is the first published paper that used SPOT4 (Take5) data (together with SAR data from Terra SAR-X and Cosmo SkyMed X band SAR data). Please remember that we are preparing a special issue on SPOT4 (Take5) in remote sensing journal, deadline is February 28th.

 

A ma connaissance, voici le premier papier utilisant des données SPOT4 (Take5) publié dans une revue à comité de lecture. Le papier utilise aussi des données radar bande -X issues de TerraSAR-X.et COSMO Sky-med. 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.

 

Hajj, M.E.; Baghdadi, N.; Belaud, G.; Zribi, M.; Cheviron, B.; Courault, D.; Hagolle, O.; Charron, F. Irrigated Grassland Monitoring Using a Time Series of TerraSAR-X and COSMO-SkyMed X-Band SAR Data. Remote Sensing 2014, 6, 10002-10032.

Posters and Presentations about SPOT4 (Take5) shown at RAQRS-IV

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The fourth edition of the RAQRS (Recent Advances in Quantitative Remote Sensing) Symposium took place in Valencia (Spain) two weeks ago. This symposium happens every forth year, is perfectly organised by J.Sobrino and his colleagues at University of Valencia. It  aims at showing the last advances in remote sensing for land surfaces, in all wavelengths and with either active or passive methods. We talked about low and high resolution time series of optical images, radar, passive microwaves, thermal infrared, paella, fluorescence, soil moisture, jamon, evapo-transpiration, biomass, orchata and biophysical variables...

 

The SPOT4 (Take5) was also present in a few posters and presentations, joined here. And it was the right place to announce SPOT5 (Take5) ! (If the document does not show up (it is too large), click on the icon on the upper right corner, if it still does not show up, use the download button)

Jordi Inglada et al posters

Claire Marais Sicre      and         Marjorie Battude