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MISSIONS

Explore the European Space Agency's Earth Observation satellite missions. Learn all about ESA's dedicated Earth Explorers or collaborations with otheragencies through the Third Party Missions programme.

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  • Mission - Earth Explorers, Heritage Missions

    Mission - Earth Explorers, Heritage Missions

    GOCE

    ESA's Gravity field and Ocean Circulation Explorer (GOCE) mission mapped Earth's geoid very accurately, opening a window into Earth's interior structure as well as the currents circulating within the depths of its oceans. 

  • Mission - Earth Explorers, Heritage Missions

    Mission - Earth Explorers, Heritage Missions

    GOCE Objectives

    Thanks to this current, the coastal waters of Europe are 4°C warmer than waters at equivalent latitudes in the north Pacific

  • Mission - Earth Explorers

    Mission - Earth Explorers

    SMOS

    The Soil Moisture and Ocean Salinity (SMOS) mission is dedicated to making global observations of soil moisture over land and salinity over oceans

  • Mission - Earth Explorers, Heritage Missions

    Mission - Earth Explorers, Heritage Missions

    GOCE Overview

    Taking the data a step further, GOCE measurements are also being used to model ocean current speeds

  • Mission - Earth Explorers

    Mission - Earth Explorers

    SMOS Objectives

    SMOS Science The SMOS mission is a direct response to the current lack of global observations of soil moisture and ocean salinity which ...

  • Mission - Earth Explorers, Heritage Missions

    Mission - Earth Explorers, Heritage Missions

    GOCE re-entry dataset

    Dataset description GOCE re-entry phase This special dataset covers the 20 days of the GOCE re-entry phase, from 20 October 2013 to the end of mission on 11 November. GOCE de-orbiting special data include all the nominal Level-1b data, i.e. the EGG gradiometer data, the orbital data from the SSTI GPS receiver and the attitude information from the Star Trackers, all the nominal Level-2 data (except for the EGG_TRF_2), and a special set of data with further dynamical and environmental information such as on-board magnetometer measurements of Earth's magnetic field, currents actuating the magnetic torquers, and linear accelerations sensed by the six ultra-sensitive accelerometers. GOCE de-orbiting started at an equatorial altitude of 224 km on 20 October when the ion thruster was switched off and GOCE was left to free-fall in the atmosphere. The satellite eventually disintegrated in the atmosphere on 11 November, at the extremely low altitude of around 115 km. During de-orbiting and re-entry, all instruments continued working almost to the end, making this dataset unique. The EGG gradiometer performed nominally up to the point when the drag levels reached 80 mN, at a mean altitude of 181 km, on 7 November. After that, measurements were affected by saturation but were still usable, limited to the portion of the orbit where the accelerometers were still within their dynamic range. An increasing portion of the orbit was eventually saturated as the atmospheric density increased, with the descending spacecraft's altitude. Acceleration measurements from the Drag-Free control (DFACS) channel are available almost to the end, down to an altitude of around 154 km, on 10 November. Both on-board GPS receivers, the SSTI-A and B instruments, remained ON in measurement mode until the very end of mission. Neither SSTI showed a significant degradation in performance during orbital decay. This data set is expected to provide a valuable asset to researchers involved in re-entry dynamics, geomagnetism and thermospheric studies. Download Download the GOCE Re-Entry phase dataset from the GOCE Online Dissemination Service. Contacts If you have general questions about the data, their quality and availability, please submit a request in the TellUS system. Available data GOCE De-orbiting data Data availability Notes Level-1 EGG_NOM_1b 21/10/2013* to 10/11/2013** *Acquisition Mode processing ** Up to 30/10/2013 unsaturated data. After this date, saturation sets in. By 07/11/2013 all data is saturated. Use DFACS accelerometers data instead. SST_NOM_1b 21/10/2013 to 10/11/2013 at 17:15 SST_RIN_1b 21/10/2013 to 10/11/2013 at 17:15 STR_VC2_1b 21/10/2013 to 10/11/2013 at 17:15 STR_VC3_1b 21/10/2013 to 10/11/2013 at 17:15 AUX_NOM_1b 21/10/2013 to 10/11/2013 at 17:29 Not baseline public data Level-1 Special Dataset DFACS Accelerometers 21/10/2013 to 10/11/2013 at 14:39 ACC_DF1_1B ACC_DF2_1B ACC_DF3_1B ACC_DF4_1B ACC_DF5_1B ACC_DF6_1B Magneto-Torquer Currents (MTR) 21/10/2013 to 10/11/2013 at 22:46 MTR_GOC_1B Magnetometers data (MAG) 21/10/2013 to 10/11/2013 at 22:46 MGM_GO1_1B MGM_GO2_1B MGM_GO3_1B Level-2 EGG_NOM_2 21/10/2013 to 05/11/2013 at 23:59 SST_PSO_2 21/10/2013 to 05/11/2013 at 23:59 SST_AUX_2 21/10/2013 to 07/11/2013 at 18:00

  • Mission - Earth Explorers, Heritage Missions

    Mission - Earth Explorers, Heritage Missions

    SSTI ANTEX Data

    ... current versions of the dataset use the reprocessed GPS orbits and clocks in the IGS08 reference frame

  • Mission - Earth Explorers

    Mission - Earth Explorers

    SMOS Overview

    Mission Background The SMOS mission is a direct response to the current lack of global observations of soil moisture and ocean salinity,...