NASA is Building a Mission That Will Refuel and Repair Satellites in Orbit article by Nancy_A
He helped design the specialized tools and procedures that astronauts would use to successfully repair and upgrade Hubble, keeping the venerable telescope operating for years longer than projected and allowing better instruments and technology to be installed in each successive mission. He also led teams that developed techniques to repair other satellites during the early days of the Space Shuttle era.
First, OSAM-1 will need to get close enough for one of the robot arms to grapple Landsat 7, and then perform docking maneuvers, using the original docking clamp or Marman ring on the satellite. Of course, this is all happening while both spacecraft are traveling at about 26,500 km/h . OSAM-1 carries six rendezvous and proximity operations cameras for use while approaching Landsat 7. An additional twenty-one cameras are part of a specialized vision sensor system to allow the teleoperators to see the operations from every angle, and floodlights provide lighting for work to continue even during orbital night, which happens about every 50 minutes. Landsat 7’s orbital period is 99 minutes.
An engineering design unit of the NASA Servicing Arm, which will be used for the OSAM-1 mission, stands in the Robotics Operations Center at NASA’s Goddard Space Flight Center.SPIDER includes its own 5-meter long robotic arm, bringing the total number of robotic arms flying on OSAM-1 to three. SPIDER will assemble a functional 3-meter communications antenna, constructed from parts brought along to space, and will demonstrate Ka-band transmission with a ground station.
“We have a lot of really niche engineers working with us who know this stuff and do it day in and day out,” Henry said. “Some of our most unique engineers are the robotic folks who know how the arms were built and understand the nuances of the joints and mechanisms – such as what poses you can and can’t put the arm in, or if an elbow joint fails, they know how you can still move the end effector with the six other actuators.
Iran’s Dasht-e Kevir, or Great Salt Desert. It is the largest desert in Iran. Picture taken by Landsat 7. Credit: NASA Earth Observatoryended on April 6, 2022 and its primary science instrument, the Enhanced Thematic Mapper Plus was placed in standby mode. But its twenty-two years in operation provided has provided substantial data on land cover management and assessment, global change studies, and for mapping.
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