NASA satellite to observe ice sheets, sea ice, clouds, and land; 2018–present, Launches are separated by dashes ( – ), payloads by dots (, Plankton, Aerosol, Cloud, ocean Ecosystem, "Orbital Sciences Grabs $135 Million NASA ICESat-2 Contract", "IceSat-2: Measuring the Height of Earth's Ice from Space", "Early morning launch closes book on Delta 2 legacy spanning nearly 30 years", "Delta II concludes amazing legacy with ICESat-2 launch", "First ICESat-2 Global Data Released: Ice, Forests and More | Icesat-2", "NASA Space Laser Completes 2,000-mile Road Trip", "ICESat-2 - eoPortal Directory - Satellite Missions", "NASA Selects United Launch Alliance's Workhorse Delta II Rocket for ICESat-2 Mission", "NASA launches 'ICESat-2' laser altimeter", "ICESat-2 Algorithm Theoretical Basis Document for the Atmosphere, Part I: Level 2 and 3 Data Products", "Ice, Cloud and Land Elevation Satellite (ICESat-2): Algorithm Theoretical Basis Document (ATBD) for Land-Vegetation Along-track Products (ATL08)", "NASA Lining up ICESat-2's Laser-catching Telescope", "The ICESat-1 Mission: Level-1 Requirements and Mission Success Criteria", "GAO Details Issues with ICESat-2 Sensor", "Paying for IceSat-2 Overruns Delays International Earth Science Launches", "NASA's IceBridge Mission Ends Its 'Best Year Ever, "IceBridge - Aircraft, Instruments, Satellites", "Lidar Applications for the Study of Ecosystems with Remote Sensing Laboratory", https://en.wikipedia.org/w/index.php?title=ICESat-2&oldid=984902262, Earth observation satellites of the United States, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, At launch: 2.5 × 1.9 × 3.8 m (8.2 × 6.2 × 12.5 ft), Advanced Topographic Laser Altimeter System.

Januar 2003 mit einer Delta II- Rakete von der Vandenberg Air Force Base in Kalifornien in eine nahezu kreisförmige, nahezu polare Umlaufbahn mit einer Höhe von ungefähr 600 km gestartet. Center for Space Research, University of Texas: Diese Seite wurde zuletzt am 9. ICESat-2 also has the ability to detect seafloor topography up to 100 feet (30m) below the surface in clear watered coastal areas. ICESat levaba a bordo un único instrumento: un láser altímetro denominado GLAS polo seu acrónimo en inglés (Geoscience Laser Altimeter System) que funcionaba emitindo pulsos cunha duración de 4 nanosegundos a lonxitudes de onda de 1064 nanómetros, correspondente ao infravermello, ou 532 nanómetros, correspondente a luz verde. Le télescope qui collecte la lumière réfléchie a un diamètre de 1 mètre. Ele foi projetado para operar por três anos e transportar propelente suficiente por sete anos. Le nouveau satellite est lancé le 15 septembre 2018. ICESat-2 is the 2nd-generation mission scheduled for launch in late 2015. ICESat ( Eis, Wolke, und Land Elevation Satellite) war eine Satelliten - Mission zur Messung der Eisdecke Massenbilanz, Wolken- und Aerosolhöhen sowie Land Topographie Eigenschaften und Vegetation.

Les deux ensembles de panneaux solaires déployés en orbite et de 3,2 mètres d'envergure disposent d'un degré de liberté. ICESat-2 ist ein Projekt des Goddard Space Flight Centers der NASA und Nachfolger des Erdbeobachtungssatelliten ICESat. Ice is water frozen into a solid state. ICESat , Teil des NASA-Erdbeobachtungssystems, ist der Name einer Satellitenmission zur Ermittlung von Eispanzerdicken, deren Veränderung, der Messung von Höhenprofilen von Wolken und Aerosolen sowie der Höhe der Vegetation und der Meereisdicke. About a dozen photons from each pulse return to the instrument and are collected with a 79 cm (2.6 ft) beryllium telescope. [15] The satellite was launched on a Delta II rocket provided by United Launch Alliance.

ICESat (Ice, Cloud, and land Elevation Satellite) es un satélite artificial de la NASA diseñado para medir masas de hielo, nubes, aerosoles, topografía y características de la vegetación. Als ICESat umkreiste produzierte GLAS eine Reihe von ca. Januar 2020 um 16:23 Uhr bearbeitet. In the following years, technical issues with the mission's only onboard instrument, ATLAS, delayed the mission further, pushing the expected launch back from late 2016 to May 2017. [30], The launch of ICESat-2 took place on 15 September 2018 at 15:02 UTC from Vandenberg Air Force Base Space Launch Complex 2 aboard a Delta II 7420-10C. [4] To maintain a degree of data continuity between the decommissioning of ICESat and the launch of ICESat-2, NASA's airborne Operation IceBridge used a variety of aircraft to collect polar topography and measure ice thickness using suites of laser altimeters, radars, and other systems. ICESat wurde für eine Betriebsdauer von drei bis fünf Jahren konzipiert.

Es funktionierte als Teil der NASA ‚s Earth Observing System . Dezember 2018 im operativen Betrieb. The laser pulse rate combined with satellite speed results in ATLAS taking an elevation measurement every 70 cm (28 in) along the satellite's ground path. Engineers also constructed the laser reference system, which confirms that the laser is adjusted in accordance to the telescope. The greater number of lasers allows for improved coverage of Earth's surface.

Während des ersten On-Orbit-Testbetriebs fiel ein Pumpdiodenmodul des ersten GLAS-Lasers am 29. The ICESat-2 spacecraft was built and tested by Northrop Grumman Innovation Systems in Gilbert, Arizona[13], while the on board instrument, ATLAS, was built and managed by Goddard Space Flight Center in Greenbelt, Maryland. Pour éviter la défaillance des deux autres lasers, un mode de fonctionnement non continu est adopté. [34] The goal of this group is to communicate the vast capabilities of the ICESat-2 mission with the greater scientific community, with the aim to diversify and innovate new methods and techniques from the collected data. ICESat (Ice, Cloud, and land Elevation Satellite c'est-à-dire satellite glace, nuage et altitude terrestre) est une mission spatiale du programme d'observation de la Terre de la NASA lancée en 2003. [8] Each beam pair is 3.3 km (2.1 mi) apart across the beam track, and each beam in a pair is separated by 2.5 km (1.6 mi) along the beam track. National Aeronautics and Space Administration, https://de.wikipedia.org/w/index.php?title=ICESat-2&oldid=195652669, „Creative Commons Attribution/Share Alike“. Das wichtigste Instrument an Bord war das Geoscience Laser Altimeter System , das vom Goddard Space Flight Center entwickelt wurde. Its predecessor, ICESat, had only one laser beam. Im August 2011 wurde Orbital ATK mit der Entwicklung und dem Bau des Satelliten beauftragt. Le faisceau infrarouge est utilisée pour les mesures d'altimétrie tandis que le laser vert est utilisé pour les mesures de l'atmosphère. Le satellite est détruit durant une rentrée atmosphérique qui se produit le 30 août 2010 et qui s'achève au-dessus de la mer de Barents[2].

En attendant de disposer du nouveau satellite, la NASA, dans le cadre du projet IceBridge, utilise un DC-8 pour mesurer l'épaisseur de la couche de glace et collecter d'autres données[6]. Les impulsions laser sont émises 40 fois par seconde. Les dates indiquées sont celles de lancement du ou des engins spatiaux. Im August 2011 wurde Orbital ATK mit der Entwicklung und dem Bau des Satelliten beauftragt. September 2018 an Bord einer Delta II- Rakete gestartet. In the spring of 2020, NASA selected the ICESat-2 Science Team through a competitive application process, to replace the pre-launch Science Definition Team. Sen toiminta päättyi helmikuussa 2010. [1] O ICESat-2, uma continuação da missão ICESat, que foi lançada em 15 de setembro de 2018 da Base Aérea de Vandenberg, na Califórnia, Estados Unidos,[2]em uma órbita quase circular, quase polar, com uma altitude de aproximadamente 496 km. [33] Early Adopters in the program, including ice scientists, ecologists, and the Navy, work with the ICESat-2 applications team to provide information on how the satellite observations can be used. It was designed to operate for three years and carry enough propellant for seven years. ICESat est un satellite stabilisé sur 3 axes d'une masse de 970 kg utilisant une plate-forme commerciale BCP 2000 développée par le constructeur du satellite Ball Aerospace. [22] Beryllium has high specific strength and holds its shape across a large range of temperatures. Juli 2020 um 17:48, This page is based on the copyrighted Wikipedia article. Un article de Wikipédia, l'encyclopédie libre.

[8], The ICESat-2 mission is designed to provide elevation data needed to determine ice sheet mass balance as well as vegetation canopy information. [29] In July 2014, NASA submitted a report to Congress detailing the reasons for the delay and a projected budget overrun, as is required by law for NASA projects which spend at least 15% over budget. It operated for seven years before being retired in February 2010, after its scienti… Während der Inbetriebnahmephase der Mission wurde der ICESat in eine Umlaufbahn gebracht, in der sich die Bodenspur alle 8 Tage wiederholen konnte.

In December 2012, NASA reported that they expected the project to launch in 2016. Le transfert de données vers la Terre se fait en bande X à l'aide de deux émetteurs redondants utilisant des antennes orientables et avec un débit de 40 mégabits/seconde.

Es war sieben Jahre lang in Betrieb, bevor es im Februar 2010 in den Ruhestand ging, nachdem seine wissenschaftliche Nutzlast abgeschaltet worden war und Wissenschaftler es nicht mehr neu starten konnten.