lunes, 12 de diciembre de 2016

Lookin' Good, Mars! ExoMars' First High-Res Photos Are Incredible- ExoMars pone a prueba su satélite TGO con imágenes de la luna marciana Phobos

Lookin' Good, Mars! ExoMars' First High-Res Photos Are Incredible
By Hanneke Weitering, Staff Writer-Producer | November 29, 2016 01:30pm ET

http://www.space.com/34843-exomars-cassis-first-mars-photos.html

Behold! The European Space Agency's new Mars orbiter just sent back its first high-resolution images of the Red Planet, and the view is amazing.
The ExoMars Trace Gas Orbiter (TGO) arrived at Mars on Oct. 19, when its companion spacecraft Schiaparelli crash-landed on the planet's surface. Since then, TGO has been circling Mars, testing out its machinery, and taking spectacularly sharp pictures of the landscape using its Colour and Stereo Surface Imaging System (CaSSIS). ESA stitched together the best of these photos in a cool new flyover video.
"The first images we received are absolutely spectacular ― and it was only meant to be a test," Nicolas Thomas, CaSSIS team leader at the University of Bern's Center of Space and Habitability, said in a statement. [Photos: Europe's ExoMars Missions to Mars in Pictures]
Image of a 0.9 mile-size (1.4 kilometers) crater (left-center) on the rim of a larger crater near the Mars equator. It was acquired at 7.2 meters/pixel by the Colour and Stereo Surface Imaging System (CaSSIS) aboard the European Space Agency's ExoMars Trace Gas Orbiter.


Credit: ESA/Roscosmos/ExoMars/CaSSIS/UniBE

These first images allowed ESA to test the camera's color- and stereo-imaging capabilities, which would allow CaSSIS to build 3D maps of the Martian surface by combining views from different perspectives.
Though the color-imaging equipment was functioning as planned, the first photos appear black and white. That's because the areas photographed are dusty ― volcanic without much color to be seen. "We will have to wait a little until something colorful passes under the spacecraft," Thomas said.
The first stereo reconstruction of a small area in Noctis Labyrinthus on Mars, created by the Colour and Stereo Surface Imaging System (CaSSIS) aboard the European Space Agency's ExoMars Trace Gas Orbiter. The image gives an altitude map of the region with a resolution of less than 65 feet (20 meters).


Credit: ESA/Roscosmos/ExoMars/CaSSIS/UniBE

TGO is currently orbiting Mars once every four days in a highly elliptical path. At its closest, the spacecraft flies within 155 miles (250 kilometers) of the ground. These close approaches are happening quickly before the orbiter raises its altitude to about 62,000 miles (100,000 km).
CaSSIS was up and running for two of these approaches during its testing phase and returned a total of 11 images. ESA then combined some of the new photos in the video above to simulate a flyover of Hebes Chasma, a 190-mile-long (310 km) canyon in the Martian surface.
"We saw Hebes Chasma at 2.8 meters per pixel," said Thomas. "That’s a bit like flying over Bern at 15,000 kilometers [9,300 miles] per hour and simultaneously getting sharp pictures of cars in Zürich."
A structure called Arsia Chasmata on the flanks of one of the large Martian volcanoes, Arsia Mons. This view was created by the Colour and Stereo Surface Imaging System (CaSSIS) aboard the European Space Agency's ExoMars Trace Gas Orbiter. The width of the image is around 16 miles (25 kilometers). The formation is volcanic in origin, and pit craters are visible.


Credit: ESA/Roscosmos/ExoMars/CaSSIS/UniBE

After the botched landing of the Schiaparelli spacecraft in October, pressures have been high for the ExoMars team. "A lot of public attention has been on the failed landing of Schiaparelli, but TGO has been working really well, so we have been extremely busy in the past month," Thomas said.
"We were quite nervous but it looks as though almost everything functioned as we planned it. The resulting images are really sharp," Antoine Pommerol, a CaSSIS co-investigator at the Center of Space and Habitability in Bern, said in the same statement.
For the next few months, the team will continue to prepare CaSSIS for its prime mission. "The test was very successful but we have identified a couple of things that need to be improved in the onboard software and in the ground post-processing," Thomas said.
TGO will spend nine to 12 months "aerobraking," or slowing down to round out its elliptical orbit. Eventually, the orbiter will circle the planet at a constant altitude of about 250 miles (400 km). Its primary science mission is scheduled to begin by the end of 2017. Then TGO will begin studying gases in the Martian atmosphere.

Email Hanneke Weitering at hweitering@space.com or follow her @hannekescience. Follow us @Spacedotcom, Facebook and Google+. Original article on Space.com.

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ExoMars pone a prueba su satélite TGO con imágenes de la luna marciana Phobos

Fotografía de la luna marciana Phobos durante la misión espacial Exo-Mars. (Agencia Espacial Europea (ESA)) La misión espacial creó una composición de colores a partir de varias "imágenes procesadas" capaces de detectar diferencias en la presencia de minerales. La meta central del satélite TGO es "crear un inventario detallado de los gases poco comunes que conforman menos del 1 % de la atmósfera" de Marte. Los que vayan a ir a Marte ya han nacido, según el director de ciencia de ESA.

EFE. 06.12.2016 - 18:13h
El Satélite para el estudio de Gases Traza (TGO, en inglés) de la misión espacial Exo-Mars tomó imágenes de la luna marciana Phobos durante su segunda operación para estudiar la superficie del Planeta Rojo y calibrar sus instrumentos, informó hoy la Agencia Espacial Europea (ESA). Nick Thomas, miembro del equipo investigador de las imágenes, explicó en el comunicado que esas fotos sirven para "calibrar la cámara y la sincronización interna" del satélite y muestran el potencial de las futuras observaciones. El TGO, un programa conjunto entre la ESA y la Agencia Espacial Rusa (Roscosmos) lanzado en octubre, realizó sus primeras medidas de calibración científica durante dos órbitas a Marte entre el 20 y el 28 de noviembre. Durante su segunda órbita, calculó las medidas de Phobos, la mayor de las dos lunas de Marte y la más cercana al planeta —a una distancia de 6.000 kilómetros— y con una superficie de 27x22x18 kilómetros. La información se utilizará para la futura plataforma espacial que será enviada a ese planeta durante la segunda misión en 2020.La cámara del TGO fotografió la luna el 26 de noviembre a 7.700 kilómetros de distancia durante su punto más cercano al Planeta Rojo. La misión espacial creó una composición de colores entre rojos y azules a partir de varias "imágenes procesadas" capaces de detectar diferencias en la presencia de minerales. Håkan Svedhem, científico del proyecto, dijo estar contento con el resultado de ambas pruebas y adelantó que las utilizarán para "mejorar las mediciones, una vez comience la misión principal" en 2017. La meta central del TGO es "crear un inventario detallado de los gases poco comunes que conforman menos del 1 % de la atmósfera" de Marte, incluyendo metano, vapor de agua, dióxido de nitrógeno y acetileno. Por último, la nave también se empleará en la recopilación de información para la futura plataforma espacial que será enviada a ese planeta durante la segunda misión de ExoMars en 2020.




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