=> The CNES THEIA distribution site was closed for 3 weeks for renovation works. It just reopened with a new address : It is possible again to downloat the L2A LANDSAT data over France. Besides anan enhanced look and feel, there are two new possibilities : As it is a new version, you might […]
Everything is set to start SPOT5 (Take 5) operational production of L1C products today (L1C products are ortho rectified images expressed in Top of Atmosphere reflectance). The Level 2A production will start a couple of days later, when all the L1C of April and May are produced (L2A products provide surface reflectances and cloud and […]
=> I had sometimes used the following home made logo for SPOT (Take5) experiments : the Paul Desmond standard is indeed based on a 5 beat rhythm, which is symbolized by the « 5 » on the time signature of the music score. The number 4 means that the beat corresponds to quarter notes. But the 4 […]
=> Summary : all the SPOT5 (Take5) scenes acquired from May the 29th to June the 2nd were lost. All sites are affected. Please accept our apologies ! A few other dates were also lost, see the list below. Usually, users of satellite images are not aware of all the work to maintain, program, configure a […]
Great news, Sentinel-2A launch date is confirmed on the 22nd of June at Kourou, less than 20 days from now ! In UTC, it will be launched on the 23rd at 1:52 AM. and in European central time, Sentinel-2 will be launched on the 23rd, at 3:52 AM. Champagne should be served around 5:00 !Grande […]
=> The distribution servers of LANDSAT and SPOT4 (Take5) within THEIA land data center went off-line today for two to three weeks. A new version of the distribution software must be installed. The next days will be used by CNES teams to install the softwares, transfer the databases and obtain the security clearance. When all […]
=> As you already know if you have been following this blog, our L2A method for cloud detection and atmospheric correction, named MACCS, makes a large use of multi-temporal information. It assumes that over lands, the surface reflectances in the blue do not change quickly with time, except on some exceptions that have to be […]
Airbus Defence and Space (Ex Spot Image), produces every week the new data downloaded from the satellite to level 1A (Thanks Myriam !). We have now received nearly two entire cycles of SPOT5 (Take5) images, which means that we have our first time series, although made of only two dates ! Our processing center, MUSCATE, within […]
=> Here is a screen copy of the first SPOT5 (Take5) ortho-rectified image (L1C) from the Lake Victoria image in Uganda, registered with a similar product from LANDSAT 8. Both images match very well, but we need to validate that much further. However, although it is not a surprise, it is good news that processors […]