Check out this image of the Canadian Space Agency’s (CSA) Canadarm2 on the International Space Station. The CSA’s Dextre is attached to one end of the arm. The Canadarm2 played a vital role in assembling the ISS, while Dextre helps maintain the ISS, freeing astronauts from routine yet dangerous spacewalks, and allowing them to focus on science.Continue reading “Cool Photo of Canadarm2 With its Dextre Hand. Oh and the Earth. That’s Nice Too.”
For decades, Canada has made significant contributions to the field of space exploration. These include the development of sophisticated robotics, optics, participation in important research, and sending astronauts into space as part of NASA missions. And who can forget Chris Hadfield, Mr. “Space Oddity” himself? In addition to being the first Canadian to command the ISS, he is also known worldwide as the man who made space exploration fun and accessible through social media.
And in recent statement, the Canadian Space Agency (CSA) has announced that it is looking for new recruits to become the next generation of Canadian astronauts. With two positions available, they are looking for applicants who embody the best qualities of astronauts, which includes a background in science and technology, exceptional physical fitness, and a desire to advance the cause of space exploration.
Over the course of the past few decades, the Canadian Space Agency has established a reputation for the development of space-related technologies. In 1962, Canada deployed the Alouette satellite, which made it the third nation – after the US and USSR – to design and build its own artificial Earth satellite. And in 1972, Canada became the first country to deploy a domestic communications satellite, known as Anik 1 A1.
Perhaps the best-known example of Canada’s achievements comes in the field of robotics, and goes by the name of the Shuttle Remote Manipulator System (aka. “the Canadarm“). This robotic arm was introduced in 1981, and quickly became a regular feature within the Space Shuttle Program.
“Canadarm is the best-known example of the key role of Canada’s space exploration program,” said Maya Eyssen, a spokeperson for the CSA, via email. “Our robotic contribution to the shuttle program secured a mission spot for our nation’s first astronaut to fly to space –Marc Garneau. It also paved the way for Canada’s participation in the International Space Station.”
It’s successor, the Canadarm2, was mounted on the International Space Station in 2001, and has since been augmented with the addition of the Dextre robotic hand – also of Canadian design and manufacture. This arm, like its predecessor, has become a mainstay of operations aboard the ISS.
“Over the past 15 years, Canadarm2 has played a critical role in assembling and maintaining the Station,” said Eyssen. “It was used on almost every Station assembly mission. Canadarm2 and Dextre are used to capture commercial space ships, unload their cargo and operate with millimeter precision in space. They are both featured on our $5 bank notes. The technology behind these robots also benefits those on earth through technological spin-offs used for neurosurgery, pediatric surgery and breast-cancer detection.”
In terms of optics, the CSA is renowned for the creation of the Advanced Space Vision System (SVS) used aboard the ISS. This computer-vision system uses regular 2D cameras located in the Space Shuttle Bay, on the Canadarm, or on the hull of the ISS itself – along with cooperative targets – to calculate the 3D position of objects around of the station.
But arguably, Canada’s most enduring contribution to space exploration have come in the form of its astronauts. Long before Hadfield was garnering attention with his rousing rendition of David Bowie’s “Space Oddity“, or performing “Is Someone Singing (ISS)” with The Barenaked Ladies and The Wexford Gleeks choir (via a video connection from the ISS), Canadians were venturing into space as part of several NASA missions.
Consider Marc Garneau, a retired military officer and engineer who became the first Canadian astronaut to go into space, taking part in three flights aboard NASA Space shuttles in 1984, 1996 and 2000. Garneau also served as the president of the Canadian Space Agency from 2001 to 2006 before retiring for active service and beginning a career in politics.
And how about Roberta Bondar? As Canada’s first female astronaut, she had the additional honor of designated as the Payload Specialist for the first International Microgravity Laboratory Mission (IML-1) in 1992. Bondar also flew on the NASA Space Shuttle Discovery during Mission STS-42 in 1992, during which she performed experiments in the Spacelab.
And then there’s Robert Thirsk, an engineer and physician who holds the Canadian records for the longest space flight (187 days 20 hours) and the most time spent in space (204 days 18 hours). All three individuals embodied the unique combination of academic proficiency, advanced training, personal achievement, and dedication that make up an astronaut.
And just like Hadfield, Bonard, Garneau and Thirsk have all retired on gone on to have distinguished careers as chancellors of academic institutions, politicians, philanthropists, noted authors and keynote speakers. All told, eight Canadians astronauts have taken part in sixteen space missions and been deeply involved in research and experiments conducted aboard the ISS.
Alas, every generation has to retire sooner or later. And having made their contributions and moved onto other paths, the CSA is looking for two particularly bright, young, highly-motivated and highly-skilled people to step up and take their place.
The recruitment campaign was announced this past Sunday, July 17th, by the Honourable Navdeep Bains – the Minister of Innovation, Science and Economic Development. Those who are selected will be based at NASA’s Johnson Space Center in Houston, Texas, where they will provide support for space missions in progress, and prepare for future missions.
Canadian astronauts also periodically return to Canada to participate in various activities and encourage young Canadians to pursue an education in the STEM fields (science, technology, engineering and mathematics). As Eyssen explained, the goals of the recruitment drive is to maintain the best traditions of the Canadian space program as we move into the 21st century:
“The recruitment of new astronauts will allow Canada to maintain a robust astronaut corps and be ready to play a meaningful role in future human exploration initiatives. Canada is currently entitled to two long-duration astronaut flights to the ISS between now and 2024. The first one, scheduled for November 2018, will see David Saint-Jacques launch to space for a six-month mission aboard the ISS. The second flight will launch before 2024. As nations work together to chart the next major international space exploration missions, our continued role in the ISS will ensure that Canada is well-positioned to be a trusted partner in humanity’s next steps in space.
“Canada is seeking astronauts to advance critical science and research aboard the International Space Station and pave the way for human missions beyond the Station. Our international partners are exploring options beyond the ISS. This new generation of astronauts will be part of Canada’s next chapter of space exploration. That may include future deep-space exploration missions.”
The recruitment drive will be open from June 17th to August 15th, 2016, and the selected candidates are expected to be announced by next summer. This next class of Canadian astronaut candidates will start their training in August 2017 at the Johnson Space Center. The details can be found at the Canadian Space Agency‘s website, and all potential applicants are advised to read the campaign information kit before applying.
Alongside their efforts to find the next generation of astronauts, the Canadian government’s 2016 annual budget has also provided the CSA with up to $379 million dollars over the next eight years to extend Canada’s participation in the International Space Station on through to 2024. Gotta’ keep reaching for those stars, eh?
Further Reading: asc-csa.gc.ca
The Japanese robotic arm installs the CATS experiment on an external platform on Japan’s Kibo lab module. The SpaceX Dragon commercial cargo craft is seen at the right center of the image. Credit: NASA TV
See way cool installation video below[/caption]
“Robotic controllers let the CATS out of the bag!” So says NASA spokesman Dan Huot in a cool new NASA timelapse video showing in detail how CATS crawled around the space stations gangly exterior and clawed its way into its new home – topped off with a breathtaking view of our home planet that will deliver science benefits to us down below.
The CATS experiment was installed on the exterior of the International Space Station (ISS) via a first ever type of robotic handoff, whereby one of the stations robotic arms handed the rectangular shaped instrument off to a second robotic arm. Sort of like relays runners passing the baton while racing around the track for the gold medal.
In this case it was all in the name of science. CATS is short for Cloud Aerosol Transport System.
Ground controllers at NASA’s Johnson Space Center in Houston plucked CATS out of the truck of the recently arrived SpaceX Dragon cargo delivery vehicle with the Special Purpose Dexterous Manipulator (Dextre). Then they passed it off to a Japanese team of controllers at JAXA, manipulating the second arm known as the Japanese Experiment Module Remote Manipulator System. The JAXA team then installed CATS onto an external platform on Japans Kibo laboratory.
CATS is a new Earth Science instrument dedicated to collecting continuous data about clouds, volcanic ash plumes and tiny airborne particles that can help improve our understanding of aerosol and cloud interactions and improve the accuracy of climate change models.
The remote-sensing laser instrument measures clouds and the location and distribution of pollution, dust, smoke, and other particulates and aerosols in the atmosphere that directly impacts the global climate.
Data from CATS will be used to derive properties of cloud/aerosol layers at three wavelengths: 355, 532, 1064 nm.
Check out this cool NASA ‘Space to Ground’ video showing CATS installation
Video caption: NASA’s Space to Ground on 1/23/15 covers CATS Out of The Bag. This is your weekly update on what’s happening aboard the International Space Station. Got a question or comment? Use #spacetoground to talk to us.
All the movements were conducted overnight by robotic flight controllers on the ground. They installed CATS to an external platform on Japan’s Kibo lab module.
CATS is helping to open a new era on the space station research dedicated to expanding its use as a science platform for making extremely valuable remote sensing observations for Earth Science.
The CATS instrument is the fourth successful NASA Earth science launch out of five scheduled during a 12-month period. And it is the second to be installed on the exterior of the ISS, following ISS-RapidScat that was brought by the SpaceX CRS-4 Dragon.
The fifth launch — the Soil Moisture Active Passive satellite — is scheduled for Jan. 29 from Vandenberg Air Force Base in California.
CATS was launched to the station as part of the payload aboard the SpaceX Dragon CRS-5 cargo vessel bolted atop the SpaceX Falcon 9 for the spectacular nighttime blastoff on Jan. 10 at 4:47 a.m. EST from Cape Canaveral Air Force Station in Florida.
CATS was loaded in the unpressurized rear trunk section of Dragon.
The Dragon CRS-5 spacecraft was loaded with over 5108 pounds (2317 kg) of scientific experiments, technology demonstrations, the CATS science payload, student research investigations, crew supplies, spare parts, food, water, clothing and assorted research gear for the six person crew serving aboard the ISS.
It successfully rendezvoused at the station on Jan. 12 after a two day orbital chase, delivering the critical cargo required to keep the station stocked and humming with science.
Stay tuned here for Ken’s continuing Earth and planetary science and human spaceflight news.
NASA inaugurated a new era of research for the International Space Station (ISS) as an Earth observation platform following the successful installation and activation of the ISS-RapidScat science instrument on the outposts exterior at Europe’s Columbus module.
The ISS Rapid Scatterometer, or ISS-RapidScat, is NASA’s first research payload aimed at conducting near global Earth science from the station’s exterior and will be augmented with others in coming years.
RapidScat is designed to monitor ocean winds for climate research, weather predictions, and hurricane monitoring.
The 1280 pound (580 kilogram) experimental instrument is already collecting its first science data following its recent power-on and activation at the station.
“Its antenna began spinning and it started transmitting and receiving its first winds data on Oct.1,” according to a NASA statement.
The first image from RapidScat was released by NASA on Oct. 6, shown below, and depicts preliminary measurements of global ocean near-surface wind speeds and directions.
The $26 million remote sensing instrument uses radar pulses to observe the speed and direction of winds over the ocean for the improvement of weather forecasting.
“Most satellite missions require weeks or even months to produce data of the quality that we seem to be getting from the first few days of RapidScat,” said RapidScat Project Scientist Ernesto Rodriguez of NASA’s Jet Propulsion Laboratory, Pasadena, California, which built and manages the mission.
“We have been very lucky that within the first days of operations we have already been able to observe a developing tropical cyclone.
“The quality of these data reflect the level of testing and preparation that the team has put in prior to launch,” Rodriguez said in a NASA statement. “It also reflects the quality of the spare QuikScat hardware from which RapidScat was partially assembled.”
RapidScat, payload was hauled up to the station as part of the science cargo launched aboard the commercial SpaceX Dragon CRS-4 cargo resupply mission that thundered to space on the company’s Falcon 9 rocket from Space Launch Complex-40 at Cape Canaveral Air Force Station in Florida on Sept. 21.
Dragon was successfully berthed at the Earth-facing port on the station’s Harmony module on Sept 23, as detailed here.
It was robotically assembled and attached to the exterior of the station’s Columbus module using the station’s robotic arm and DEXTRE manipulator over a two day period on Sept 29 and 30.
Ground controllers at Johnson Space Center intricately maneuvered DEXTRE to pluck RapidScat and its nadir adapter from the unpressurized trunk section of the Dragon cargo ship and attached it to a vacant external mounting platform on the Columbus module holding mechanical and electrical connections.
The nadir adapter orients the instrument to point at Earth.
The couch sized instrument and adapter together measure about 49 x 46 x 83 inches (124 x 117 x 211 centimeters).
Engineers are in the midst of a two week check out process that is proceeding normally so far. Another two weeks of calibration work will follow.
Thereafter RapidScat will begin a mission expected to last at least two years, said Steve Volz, associate director for flight programs in the Earth Science Division, NASA Headquarters, Washington, at a prelaunch media briefing at the Kennedy Space Center.
RapidScat is the forerunner of at least five more Earth science observing instruments that will be added to the station by the end of the decade, Volz explained.
The second Earth science instrument, dubbed CATS, could be added by year’s end.
The Cloud-Aerosol Transport System (CATS) is a laser instrument that will measure clouds and the location and distribution of pollution, dust, smoke, and other particulates in the atmosphere.
CATS is slated to launch on the next SpaceX resupply mission, CRS-5, currently targeted to launch from Cape Canaveral, FL, on Dec. 9.
This has been a banner year for NASA’s Earth science missions. At least five missions will be launched to space within a 12 month period, the most new Earth-observing mission launches in one year in more than a decade.
ISS-RapidScat is the third of five NASA Earth science missions scheduled to launch over a year.
NASA has already launched the Global Precipitation Measurement (GPM) Core Observatory, a joint mission with the Japan Aerospace Exploration Agency in February, and the Orbiting Carbon Observatory-2 (OCO-2) carbon observatory in July 2014.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
Learn more about Commercial Space Taxis, Orion and NASA Human and Robotic Spaceflight at Ken’s upcoming presentations:
Oct 14: “What’s the Future of America’s Human Spaceflight Program with Orion and Commercial Astronaut Taxis” & “Antares/Cygnus ISS Rocket Launches from Virginia”; Princeton University, Amateur Astronomers Assoc of Princeton (AAAP), Princeton, NJ, 7:30 PM
Oct 23/24: “Antares/Cygnus ISS Rocket Launch from Virginia”; Rodeway Inn, Chincoteague, VA
In a thrilling demonstration of space robotics, today the Dextre “hand” replaced a malfunctioning camera on the station’s Canadarm2 robotic arm. And the Canadian Space Agency gleefully tweeted every step of the way, throwing in jokes to describe what was happening above our heads on the International Space Station.
“Dextre’s job is to reduce the risk to astronauts by relieving them of routine chores, freeing their time for science,” the Canadian Space Agency tweeted today (May 27) .
“Spacewalks are thrilling, inspiring, but can potentially be dangerous. They also take a lot of resources and time. So Dextre is riding the end of Canadarm2 today instead of an astronaut. And our inner child is still yelling out ‘Weeeee…!’ ”
The complex maneuvers actually took a few days to accomplish, as the robot removed the broken camera last week and stowed it. Today’s work (performed by ground controllers) was focused on putting in the new camera and starting to test it. You can see some of the most memorable tweets of the day below.
The cookie you see in the first tweet is part of a tradition in Canada’s robotic mission control near Montreal, Que., where controllers have this snack on the day when they are doing robotic work in space.
Incidentally, the Canadian Space Agency bet NASA a box of maple cream cookies in February during a gold-medal Olympic hockey game between the two countries, which Canada won.
— CanadianSpaceAgency (@csa_asc) May 27, 2014
— CanadianSpaceAgency (@csa_asc) May 27, 2014
— CanadianSpaceAgency (@csa_asc) May 27, 2014
To close out their final week aboard the International Space Station, three of the six Expedition 39 crew members are completing their unloading tasks inside the docked commercial SpaceX Dragon cargo freighter and other duties while teams at Mission Control in Houston conduct delicate robotics work outside with dazzling maneuvers of the Dextre robot to remove the last external experiment from the vessels storage truck.
See a dazzling gallery of photos of Dextre dangling outside the docked Dragon depot – above and below.
On Monday, May 5, the robotics team at NASA Mission Control Center at the Johnson Space Center in Houston carefully guided Canada’s Dextre robotic “handyman” attached to the end of the 57-foot long Canadarm2 to basically dig out the final payload item housed in the unpressurized trunk section at the rear of the SpaceX Dragon cargo vessel docked to the ISS.
Dextre stands for “Special Purpose Dexterous Manipulator” and was contributed to the station by the Canadian Space Agency. It measures 12 feet tall and is outfitted with a pair of arms and an array of finely detailed tools to carry out intricate and complex tasks that would otherwise require spacewalking astronauts.
The massive orbiting outpost was soaring some 225 miles above the home planet as Dextre’s work was in progress to remove the Optical PAyload for Lasercomm Science, or OPALS, from the Dragon’s truck.
The next step is to install OPALS on the Express Logistics Carrier-1 (ELC-1) depot at the end of the station’s port truss on Wednesday.
Monday’s attempt was the second try at grappling OPALS. The initial attempt last Thursday “was unsuccessful due to a problem gripping the payload’s grapple fixture with the Special Purpose Dextrous Manipulator, or Dextre,” NASA reported.
A software patch solved the problem.
This unmanned Dragon delivered about 4600 pounds of cargo to the ISS including over 150 science experiments, a pair of hi tech legs for Robonaut 2, a high definition Earth observing imaging camera suite (HDEV), the laser optical communications experiment (OPALS), the VEGGIE lettuce growing experiment as well as essential gear, spare parts, crew provisions, food, clothing and supplies to the six person crews living and working aboard in low Earth orbit, under NASA’s Commercial Resupply Services (CRS) contract.
OPALS uses laser light instead of radio waves to beam back precisely guided data packages to ground stations. The use of lasers should greatly increase the amount of information transmitted over the same period of time, says NASA.
The science experiments carried aboard Dragon are intended for research to be conducted by the crews of ISS Expeditions 39 and 40.
Robotics teams had already pulled out the other payload item from the truck, namely the HDEV imaging suite. It is already transmitting back breathtaking real time video views of Earth from a quartet of video cameras pointing in different directions mounted on the stations exterior.
The SpaceX CRS-3 mission marks the company’s third resupply mission to the ISS under a $1.6 Billion contract with NASA to deliver 20,000 kg (44,000 pounds) of cargo to the ISS during a dozen Dragon cargo spacecraft flights through 2016.
After spending six months in space, Station Commander Koichi Wakata from Japan as well as NASA astronaut Rick Mastracchio and Russian cosmonaut Mikhail Tyurin will be departing the station in a week aboard their Soyuz TMA-11M spacecraft on May 13 at 6:33 p.m. EDT.
They are scheduled to land some 3.5 hours later in the steppes of Kazakhstan at 9:57 p.m. (7:57 a.m. Kazakh time on May 14). The events will be carried live on NASA TV.
To prepare for the journey home, the trio also completed fit checks on their Russian Sokol launch and entry suits on Monday.
Meanwhile Dragon is also set to depart the station soon on May 18 for a parachute assisted splashdown and recovery by boats in the Pacific Ocean west of Baja California.
Dragon has been docked to the station since arriving on Easter Sunday morning, April 20.
It was grappled using Canadarm 2 and berthed at the Earth facing port of the Harmony module by Commander Wakata and flight engineer Mastracchio while working at the robotics work station inside the seven windowed domed Cupola module.
For the return trip, the Expedition 39 crew is also loading Dragon with precious science samples collected over many months from the crews research activities as well as trash and no longer needed items.
Stay tuned here for Ken’s continuing SpaceX, Orbital Sciences, commercial space, Orion, Chang’e-3, LADEE, Curiosity, Mars rover, MAVEN, MOM and more planetary and human spaceflight news.
In Canada, “gimme five” could soon have a space connotation. Today the country announced it is preparing to put new polymer $5 bills into circulation that feature Canadian robotics and an astronaut.
At the official circulation ceremony near Montreal, Que. was none other than Canadian astronaut Chris Hadfield, who brought unprecedented social media attention to space through social media. The world was enchanted by his guitar playing and crying in space, but in space circles he also commands a lot of respect. The trilingual Hadfield visited two space stations, helped build the robotic Canadarm2 in space, and commanded the International Space Station, among other achievements.
His presence was appropriate, because the $5 bill has a lot of robotics on it. Canadarm2, Dextre and an astronaut are splashed across one face of the bill. “It reminds us that our dreams do not have a limit,” Hadfield said in French.
“It serves as a reminder to all Canadians of the dedication and hard work of so many people across the Canadian Space Agency and the space industry across Canada, and the scientists and engineers that make the design of these incredibly complex robots and getting them into space somehow easy,” Hadfield added in English. “Being involved in it is the real inspiration part. Who knows where such innovation can take us.”
The Bank of Canada first unveiled the new $5 and $10 bills in April, while Hadfield was at the helm of the station. Canada’s central banking authority is touting the new plasticized bill series as more durable than past cotton-based ones, with better counterfeit measures such as transparency. Polymer bills are available already in $20, $50 and $100 denominations.
Opposite to the space-themed side of the $5 bill is a picture of past prime minister Wilfrid Laurier. The new $10 bill features a train on one side and (as with the past iteration) John A. Macdonald, the first Canadian prime minister, on the other.
Hadfield himself has featured on both Canadian currency and stamps in the past: the Royal Mint of Canada issued two coins with him and Canadarm2 in 2006, and Hadfield was among several astronauts put on to Canadian stamps in 2003.
In a world first, Canada’s Chris Hadfield unveiled a new money note — while in space.
Hadfield spun a fiver before the camera Tuesday as part of a ceremony to announce new $5 and $10 bills that will be distributed in Canada this year. The $5 bill will feature two pieces of Canadian technology that helped build the station: Canadarm2, which is a mobile robotic arm, and the hand-like Dextre.
The bill also shows an unidentified astronaut. That said, the choice to use Hadfield in the press conference was likely not a coincidence: Hadfield assisted with Canadarm2’s installation in 2001 when he became the first Canadian to walk in space.
“These bills will remind Canadians, every time they buy a sandwich and a coffee and a donut, what we are capable of achieving,” said Hadfield, who is in command of Expedition 35 on the International Space Station. His comments were carried on a webcast from the Bank of Canada.
The money note travelled with Hadfield in his Soyuz when he rocketed to the station in December, the Canadian Space Agency told Universe Today.
The polymer notes are intended to be more secure than the last generation of bills issued in Canada. Polymer $20, $50 and $100 bills are already available, but the smaller currencies won’t hit consumer pocketbooks until November.
“Featuring a sophisticated combination of transparency and holography, this is the most secure bank note series ever issued by the Bank of Canada. The polymer series is more economical, lasting at least two and half times longer than cotton-based paper bank notes, and will be recycled in Canada,” the Bank of Canada stated in a press release.
As with the past $5 bill, the opposite face of the new bill shows a drawing of past prime minister Wilfrid Laurier. Also shown at the ceremony: the $10 bill, with a Via Canada train on one side and John A. Macdonald, the first Canadian prime minister, on the other.
Both Jim Flaherty, Canada’s minister of finance, and Bank of Canada governor Mark Carney wore Expedition 35 pins at the press conference.
“I hope that’s not London calling,” Flaherty quipped to laughing reporters when NASA’s Mission Control phoned in with Hadfield on the line.
Hadfield is no stranger to space-themed currency. In 2006, the Royal Mint of Canada released two coins featuring him and Canadarm2. Hadfield and several other Canadian astronauts were also put on to Canadian stamps in 2003.
You can check out the full set of polymer bills on this Flickr series uploaded by the Bank of Canada.
A combined team of American and Canadian engineers has taken a major first step forward by successfully applying new, first-of-its-kind robotics research conducted aboard the International Space Station (ISS) to the eventual repair and refueling of high value orbiting space satellites, and which has the potential to one day bring about billions of dollars in cost savings for the government and commercial space sectors.
Gleeful researchers from both nations shouted “Yeah !!!” – after successfully using the Robotic Refueling Mission (RRM) experiment – bolted outside the ISS- as a technology test bed to demonstrate that a remotely controlled robot in the vacuum of space could accomplish delicate work tasks requiring extremely precise motion control. The revolutionary robotics experiment could extend the usable operating life of satellites already in Earth orbit that were never even intended to be worked upon.
“After dedicating many months of professional and personal time to RRM, it was a great emotional rush and a reassurance for me to see the first video stream from an RRM tool,” said Justin Cassidy in an exclusive in-depth interview with Universe Today. Cassidy is RRM Hardware Manager at the NASA Goddard Spaceflight Center in Greenbelt, Maryland.
And the RRM team already has plans to carry out even more ambitious follow on experiments starting as soon as this summer, including the highly anticipated transfer of fluids to simulate an actual satellite refueling that could transfigure robotics applications in space – see details below !
All of the robotic operations at the station were remotely controlled by flight controllers from the ground. The purpose of remote control and robotics is to free up the ISS human crew so they can work on other important activities and conduct science experiments requiring on-site human thought and intervention.
Over a three day period from March 7 to 9, engineers performed joint operations between NASA’s Robotic Refueling Mission (RRM) experiment and the Canadian Space Agency’s (CSA) robotic “handyman” – the Dextre robot. Dextre is officially dubbed the SPDM or Special Purpose Dexterous Manipulator.
On the first day, robotic operators on Earth remotely maneuvered the 12-foot (3.7 meter) long Dextre “handyman” to the RRM experiment using the space station’s Canadian built robotic arm (SSRMS).
Dextre’s “hand” – technically known as the “OTCM” – then grasped and inspected three different specialized satellite work tools housed inside the RRM unit . Comprehensive mechanical and electrical evaluations of the Safety Cap Tool, the Wire Cutter and Blanket Manipulation Tool, and the Multifunction Tool found that all three tools were functioning perfectly.
“Our teams mechanically latched the Canadian “Dextre” robot’s “hand” onto the RRM Safety Cap Tool (SCT). The RRM SCT is the first on orbit unit to use the video capability of the Dextre OTCM hand,” Cassidy explained.
“At the beginning of tool operations, mission controllers mechanically drove the OTCM’s electrical umbilical forward to mate it with the SCT’s integral electronics box. When the power was applied to that interface, our team was able to see that on Goddard’s large screen TVs – the SCT’s “first light” video showed a shot of the tool within the RRM stowage bay (see photo).
“Our team burst into a shout out of “Yeah!” to commend this successful electrical functional system checkout.”
Dextre then carried out assorted tasks aimed at testing how well a variety of representative gas fittings, valves, wires and seals located on the outside of the RRM module could be manipulated. It released safety launch locks and meticulously cut two extremely thin satellite lock wires – made of steel – and measuring just 20 thousandths of an inch (0.5 millimeter) in diameter.
“The wire cutting event was just minutes in duration. But both wire cutting tasks took approximately 6 hours of coordinated, safe robotic operations. The lock wire had been routed, twisted and tied on the ground at the interface of the Ambient Cap and T-Valve before flight,” said Cassidy.
This RRM exercise represents the first time that the Dextre robot was utilized for a technology research and development project on the ISS, a major expansion of its capabilities beyond those of robotic maintenance of the massive orbiting outpost.
Video Caption: Dextre’s Robotic Refueling Mission: Day 2. The second day of Dextre’s most demanding mission wrapped up successfully on March 8, 2012 as the robotic handyman completed his three assigned tasks. Credit: NASA/CSA
Altogether the three days of operations took about 43 hours, and proceeded somewhat faster than expected because they were as close to nominal as could be expected.
“Days 1 and 2 ran about 18 hours,” said Charles Bacon, the RRM Operations Lead/Systems Engineer at NASA Goddard, to Universe Today. “Day 3 ran approximately 7 hours since we finished all tasks early. All three days baselined 18 hours, with the team working in two shifts. So the time was as expected, and actually a little better since we finished early on the last day.”
“For the last several months, our team has been setting the stage for RRM on-orbit demonstrations,” Cassidy told me. “Just like a theater production, we have many engineers behind the scenes who have provided development support and continue to be a part of the on-orbit RRM operations.”
“At each stage of RRM—from preparation, delivery, installation and now the operations—I am taken aback by the immense efforts that many diverse teams have contributed to make RRM happen. The Satellite Servicing Capabilities Office at NASA’s Goddard Space Flight Center teamed with Johnson Space Center, Kennedy Space Center (KSC), Marshall Space Flight Center and the Canadian Space Agency control center in St. Hubert, Quebec to make RRM a reality.”
“The success of RRM operations to date on the International Space Station (ISS) using Dextre is a testament to the excellence of NASA’s many organizations and partners,” Cassidy explained.
The three day “Gas Fittings Removal task” was an initial simulation to practice techniques essential for robotically fixing malfunctioning satellites and refueling otherwise nominally operating satellites to extend to hopefully extend their performance lifetimes for several years.
Ground-based technicians use the fittings and valves to load all the essential fluids, gases and fuels into a satellites storage tanks prior to launch and which are then sealed, covered and normally never accessed again.
“The impact of the space station as a useful technology test bed cannot be overstated,” says Frank Cepollina, associate director of the Satellite Servicing Capabilities Office (SSCO) at NASA’s Goddard Space Flight Center in Greenbelt, Md.
“Fresh satellite-servicing technologies will be demonstrated in a real space environment within months instead of years. This is huge. It represents real progress in space technology advancement.”
Four more upcoming RRM experiments tentatively set for this year will demonstrate the ability of a remote-controlled robot to remove barriers and refuel empty satellite gas tanks in space thereby saving expensive hardware from prematurely joining the orbital junkyard.
The timing of future RRM operations can be challenging and depends on the availability of Dextre and the SSRMS arm which are also heavily booked for many other ongoing ISS operations such as spacewalks, maintenance activities and science experiments as well as berthing and/or unloading a steady stream of critical cargo resupply ships such as the Progress, ATV, HTV, Dragon and Cygnus.
Flexibility is key to all ISS operations. And although the station crew is not involved with RRM, their activities might be.
“While the crew itself does not rely on Dextre for their operations, Dextre ops can indirectly affect what the crew can or can’t do,” Bacon told me. “For example, during our RRM operations the crew cannot perform certain physical exercise activities because of how that motion could affect Dextre’s movement.”
Here is a list of forthcoming RRM operations – pending ISS schedule constraints:
- Refueling (summer 2012) – After Dextre opens up a fuel valve that is similar to those commonly used on satellites today, it will transfer liquid ethanol into it through a sophisticated robotic fueling hose.
Thermal Blanket Manipulation (TBD 2012)- Dextre will practice slicing off thermal blanket tape and folding back a thermal blanket to reveal the contents underneath.
Screw (Fastener) Removal (TBD 2012)- Dextre will robotically unscrew satellite bolts (fasteners).
Electrical Cap Removal (TBD 2012)- Dextre will remove the caps that would typically cover a satellite’s electrical receptacle.
RRM was carried to orbit inside the cargo bay of Space Shuttle Atlantis during July 2011 on the final shuttle mission (STS-135) of NASA’s three decade long shuttle program and then mounted on an external work platform on the ISS backbone truss by spacewalking astronauts. The project is a joint effort between NASA and CSA.
“This is what success is all about. With RRM, we are truly paving the way for future robotic exploration and satellite servicing,” Cassidy concluded.
March 24 (Sat): Free Lecture by Ken Kremer at the New Jersey Astronomical Association, Voorhees State Park, NJ at 830 PM. Topic: Atlantis, the End of Americas Shuttle Program, RRM, Orion, SpaceX, CST-100 and the Future of NASA Human & Robotic Spaceflight
If it turns out that astronauts do have to leave the International Space Station unmanned, at least Dextre, the Canadian Space Agency’s robotic handyman, will be there to take care of things until humans return. Above is a sped-up video showing the work done recently by Dextre, replacing a faulty circuit-breaker box outside the station. Curiously, the robot did most of this work while the astronauts inside were sleeping. Imagine, dozing peacefully inside your sleep station and hearing a knocking sound outside the module….
Continue reading “Robot Works on Repairs While ISS Astronauts Sleep”