Desert RATS: Geology from the Rover

By Dr. Jacob Bleacher
Dr. Jacob Bleacher is a Planetary Geologist working at NASA Goddard Space Flight Center. For the 2010 Desert RATS field test, Dr. Bleacher is the geology crew member on rover B during week one.

I am a geologist who studies lava flows on the Earth, moon, and Mars. To do so, I conduct field work on lava flows here on the Earth for comparison with other planets. The Space Exploration Vehicle (SEV) is a tremendous asset for conducting field geology in extreme environments. Unlike Apollo, where the crew needed to return to the Lander at the end of each day, we use the SEV to travel from a site of geologic interest to another site of geologic interest, without being forced to return to a common location every night. As such, we carry the most important geologic tool with us, the geologist.

To support the geologist, the rover has a bevy of tools. Once we reach an exciting site, and our commander has picked a safe location to park, we begin by recording a voice note to tell the science team what our plan is for exploring the area. This note is supported by video and images taken from cameras mounted on masts above the rover. After providing an overview to the science team, they are given control of the cameras to track our progress outside of the rover. At this point, we move to the back of the rover, where the suitports are located, and begin our Extra-Vehicular Activity or EVA. The suitports are a new design allowing us to climb into the suit through its backpack. The process keeps the suit and the dust that sticks to it on the outside of the rover.

Once outside, we collect the tools that we will need to complete our objectives for the site. We have a standard geologist hammer, shovels, core tube (to collect soils without disturbing their layers), and sample bags. We also have two cameras mounted on our backpacks. We use the cameras to show the scientists at base camp the rocks and samples we are collecting. With the cameras, we record notes for the science team. Our field notes describe sample characteristics and its relationship to other samples. The cameras provide audio, video, and high definition images that help us document what we have done.

After we collect samples, we weigh them and store them in a locker on the aft (back deck of the rover.) The aft is where the samples are stored until we meet up with the Pressurized Excursion Module or PEM. Our SEV docks to the PEM. The PEM is a large habitat housing tools and equipment we use to repair our suits or hardware. In the habitat we also have medical equipment and a geology work station. The geology workstation has laboratory instruments we use to study exciting samples in more detail. This is how we will use the SEVs to explore the geology of another planet or the moon.

Geologists collecting rock samples

Geologists Dr. Jacob Bleacher (left) and Dr. Jim Rice (right) take a closer look before collecting samples.

Rover docked with the PEM

Space Exploration Vehicle rovers A & B connected to the Pressurized Excursion Module (PEM).

Desert RATS: Extravehicular Activity (EVA) Information System

By Scott Bleisath
Scott Bleisath is leading a team of engineers from NASA Glenn Research Center (GRC), who are developing electronics and displays for NASA’s next generation of astronaut space suits.

The Extravehicular Activity (EVA) Power, Avionics, and Software team at NASA’s Glenn Research Center (Cleveland, Ohio) are proud to be participating in Desert RATS 2010. As part of NASA’s space suit engineering team, our role is to develop a suite of electronic tools and applications that will help future spacewalking astronauts work efficiently and autonomously. For Desert RATS 2010, we are testing a prototype EVA Information System (EVAIS). This electronic system is carried inside the astronaut backpacks, used during the daily EVA (spacewalk) excursions performed by the rover crews. The EVAIS works along with a small flat-panel computer display on the astronaut’s wrist, called a cuff display, and a High Definition (HD) video camera mounted on the backpack.

› Learn more about this technology: Watch the NASA EDGE webcast on Friday, Sept. 10, 2010 at 1 pm EDT, featuring an EVAIS engineer!

The EVAIS and cuff display stores and displays timelines, procedures, and maps to the Desert RATS crewmembers. For an astronaut performing a spacewalk, providing access to this type of information is very important. For any exploration space mission beyond Earth orbit, such as missions to the Moon, near Earth asteroids, or Mars, communication with flight controllers on Earth may not be available or may be significantly delayed. The EVAIS enables the crew to manage their activities autonomously.

At Desert RATS, we are learning what is the correct type and amount of information needed by an EVA crewmember. Any electronics going on a spacesuit has to be very efficient from a size, weight, and power perspective. So, we cannot afford to have any “bells and whistles.” Our team spent over a year talking to astronauts and other stakeholders to understand their needs and expectations for our system. They made it clear to us that we cannot bog the crew down with too much information, because that would hinder operations, rather than help.

In addition to displaying information, the EVAIS allows an EVA crewmember to record snapshots and Crew Field Notes (CFNs) with an HD video camera. For geologists, much of the data that they gather, when working out in the field, is their verbal observations being dictated into a tape recorder. Using buttons on the cuff display, the astronaut can activate the camera and built-in recorder to record CFNs. So, the crewmember can gather a rock sample, hold it up in front of the camera, and provide a verbal description. The CFNs are stored on the EVAIS and at the end of the day, they are sent to the science-support team on the ground to analyze.

As the 14-day mission for Desert RATS 2010 is nearing completion, our team is very pleased with the results that we have seen so far. Our system has held up well to the rigorous desert environment. It has been a lot of fun to see our system in use and see how much the science-support team appreciates the geologic data recorded by the EVAIS. We are already thinking about improvements we can make in Desert RATS 2011.

Stan Love holding up sample rock

Astronaut Stan Love (foreground left) holds up a sample rock, while recording a Crew Field Note during an EVA. A cuff display can be seen on his left arm.

Stan Love holding up sample rock

This is an example snap-shot image recorded by the EVA Information System. The image was recorded by Desert RATS crewmember Jake Bleacher. The color chart worn on his wrist helps geologists analyze the rock sample. Space Exploration Vehicle Rover B can be seen in the background.

Desert RATS: Dr. Love's Roving Blog

By Dr. Stan Love
Dr. Stanley G. Love is a NASA Astronaut. He completed his first spaceflight on the crew of STS-122, logging over 306 hours in space, including over 15 Extra-Vehicular Activity (EVA) hours in two spacewalks.

September 8, 2010

I’ve finished my tour of duty aboard Rover B for the first week of Desert RATS, and returned home to Houston. The mission was very busy, but now there’s time to reflect on the experience and write about it.

Although we were rolling across plains of waving grass with yellow flowers under sunny blue skies, the rover journey was surprisingly similar to the experience I had flying in space on Space Shuttle mission STS-122. The living quarters were small, the preserved food was very much like the menu aboard the Space Shuttle, and the flow of each day’s carefully scripted and timelined operations was familiar. There were differences, of course: getting ready for a walk outside took minutes instead of hours, and the backpack we wore to simulate a space suit weighed 35 pounds, not 350!

Another difference between D-RATS and a space mission is that a simulation on Earth has some room for fun. So the fuzzy dice we hung from the front cockpit ceiling of Rover B were thought to be amusing rather than unprofessional, and the cow skull we zip-tied to the roof was hilarious instead of an embarrassment.

Like a space mission, however, the hallmark of the D-RATS experience is serious work. Our crew work days were fifteen hours long. We had no time to watch the DVDs we’d brought for evening entertainment. We kept a constant eye on the clock, with miles of slow driving and three geological sampling EVAs to complete before the hard deadline at the end of each day. We also kept very busy balancing the engineering and human-factors testing of the rover with the scientific goals of the expedition.

D-RATS is still running. We won’t find out until afterward how well it went and how much we learned from it. But it was a great experience and I hope they invite me back next year!

Astronaut Stan Love looking at crater

Astronaut Stan Love in the foreground of an amazing view of a crater during Mission Day 5.

Talking to base camp

Astronaut Stan Love talks to scientists at base camp and describes one of the rocks he finds on Mission Day 6.

Desert RATS 2010: Training, Practice and Teamwork, Continued

By Dean Eppler
Dean Eppler is the D-RATS Science Lead.

September 8, 2010

So, we’re into Week 2 – new crew, new mission, and about a third of the science team is new members replacing folks that have to go home. The first week of operations went very well; although the first day of operations was hectic, with a lot of things that didn’t start up as well as we would like, the team pulled together and the problems were quickly fixed. By the second day, we were all operating as smoothly as if we had working together for months.

The second week started off with a day of bad weather – steady rain, winds and low hanging clouds – definitely not weather for space operations. Initially, it was hoped that we would be able to conduct our operations in the afternoon, so each rover science team took a hard look at the planned traverse for the day and figured out how it could be replanned to take into account the limited operations and still get our science objectives done. It was a good exercise – the fact is that while we would like every mission to go exactly as planned, the real world rarely allows that, and a key capability is the ease of replanning.

In the months prior to coming to Flagstaff, the traverse planners were careful to use the science objectives of the field operation to prioritize each station. Consequently, we were able to re-plan the operations for the day in about an hour, and have a new plan ready to go. In the end, although the weather cleared up a bit late in the morning, the National Weather Services in Flagstaff warned us that the good weather wouldn’t last, so the Mission Management Team scrubbed the activity at about 11:30 a.m. Last night, after a discussion with the Mission Management Team, the Strategic Science Operations Team did a hard look at the constraints we have on the rest of the mission, and began replanning the last 5 days. This morning, we’re initiating the first part of that replan, which is starting with the stations we missed yesterday. As the days go on, we’ll be continue to implement that new plan so we arrive back at our Base Camp by noon on Day 14.

ATHLETE rover and Habitat Demonstration Unit

The ATHLETE rover and Habitat Demonstration Unit ready for a day of operations.

Desert RATS Technologies: Habitat Demonstration Unit

by Tracy Gill
Tracy Gill is on the management team of the Habitat Demonstration Unit (HDU) project, which brings together a multi-center team of NASA architects, scientists and engineers, working together to develop sustainable living quarters, workspaces, and laboratories for next-generation space missions.

September 8, 2010

When we last left our intrepid readers on August 30, we told you about getting the Habitat Demonstration Unit-Pressurized Excursion Module (HDU-PEM) configuration assembled and tested in Houston and then packed up to ship to Arizona. Since then, plenty has happened. We had a couple of issues in transporting hardware to Arizona including some elements that were damaged on the bumpy roads that led to our test site and one support vehicle that broke down in Amarillo, Texas that will now arrive about two weeks late. Nonetheless, we have persevered through heat, wind, dust, dust, more dust, and even a little rain to get the HDU-PEM up and running to support Desert Research and Technology Studies (D-RATS) 2010 at SP Mountain in Arizona.

HDU in front of SP Mountain

The HDU PEM ready for operations with SP Mountain just visible in the background.

At SP Mountain, the HDU-PEM team is set up about 14 miles via paved and dirt roads from the main D-RATS base camp at Black Point Lava Flow. So our skeleton crew at SP Mountain had to put forth a tremendous effort in just a few days to unload, assemble, test, and solve problems to be ready for the dry run and then test operations. As someone used to working in clean rooms and control rooms and meeting in conference rooms for pre-test briefings, I found that holding daily pre-test briefings literally in the field was definitely different.

HDU pre-test briefing

Pre-test briefing HDU-PEM-style in the field in Arizona.

The Space Exploration Vehicle (SEV) rover crews docked with the HDU-PEM to perform geologic science and other activities at SP Mountain on Day 7 and will dock again at Black Point Lava Flow on Day 14 of the 14-day traverse mission of D-RATS 2010. So that means we have to pack, assemble, and deploy twice during the D-RATS campaign to simulate a mobile asset available for excursions from an exploration base. While the SEV rover crews are only performing joint operations with the HDU-PEM on two mission days, on the other days, we are performing independent test activities using operators such as geologists, engineers, interns, and others. And our human factors experts assess the performance data to help us assess the utility and effectiveness of the technologies, systems, and the operations inside the HDU-PEM.

Medical Operations Workstation

Two of the four workstations inside the HDU-PEM: The Medical Operations Workstation (left) featuring a dual purpose work surface and patient table and the Geolab featuring a Glovebox.

One of the major milestones of the D-RATS 2010 occurred at the end of Mission Day 6 when the two SEV Rovers docked with the HDU-PEM. It made for a great picture as you can see, and our team was quite proud to see our systems being featured on Day 7 of the rover crew’s timeline.

HDU docked with rovers A and B

Space Exploration Vehicle Rovers A and B docked to the HDU-PEM on September 5, 2010 near SP Mountain.

Desert RATS: Human Factors

By Robert Howard and Chip Litaker
Dr. Robert Howard is the manager of NASA’s Habitability Design Center within the Space and Life Sciences Directorate at Johnson Space Center. At Desert RATS, Dr. Howard oversees human factors evaluations aboard both rovers and the Habitat Demonstration Unit.

Mission day 7 finds us at the mid-point of our 14 day D-RATS mission and my team, the human factors (HF) team, has been asked to explain a little bit about what we investigate in regards to habitability of the rovers and the Habitat Demonstration Unit (HDU). The field of human factors is a systematic application of discovering information about human capabilities, characteristics, limitations, and motivation in order to design technology and procedures for people to become more productive, safe, comfortable, and effective in the environments in which they use such items.

Habitation is the space which determines the overall living and working environment for an individual within a vehicle or habitat, which affects the quality of daily life and productivity while onboard a space vehicle. With the rovers, we study over 212 operational elements of each rover, 50 of which are for habitability alone. These elements include the crew interfacing with the displays and controls, preparing a meal, exercising, driving, visibility and daily habitat operations to name a few.

Preparing lunch

A crew member prepares lunch. (Note the small sink and water hose he is using to rehydrate his meal.)

HF engineers also look at a crew’s workload, fatigue, and thermal comfort while performing such tasks as driving, Extra-Vehicular Activities (EVA) and docking. We record the amount of water the crew uses, the weight of logistics (like clothing, food, equipment), and the amount of trash generated by the crew to understand the amount of consumables needed for a crew of two on a 7-day planetary mission. This in turn, assists mission planners who develop the missions the crew will possible go on in the future. By using standard human performance measures, HF engineers can obtain an understanding of the interaction between the human and the machine. This tells us if the crew can live effectively inside the vehicles we are designing.

Pre-flight clothing inventory

An HF engineer takes a pre-flight clothing inventory. The white container is called a soft locker. The crew can store clothing, personal items, and food in the locker for a mission.

Crew member relaxing

A crew member relaxes after a hard day at work. (Note the soft lockers hanging in the rover’s side hatch way next to the sleep bench on the right.)

The rovers are just one set of vehicles HF engineers are examining. On Mission Day 6, both rovers docked to the HDU, which simulates a working habitat called the Pressurized Excursion Module (PEM). The habitat has a geology station, a space suit maintenance station, a general maintenance station, and a medical station. While the crews are docked to the PEM, they live in the rovers and work in the PEM. The PEM is a very exciting development. The workstations allow the human crew to do many things on the moon that were previously impossible in human spaceflight.

Rovers docked

Both rovers docked to the Pressurized Excursion Module (PEM) around 5:00 p.m. on mission day 6.

While in the PEM, the crews have specific tasks to perform on each station. For example, they examine and analyze rock samples they collected while on a traverse and they fix items needing repair. Together, the two rovers and the PEM can support a crew for up to a month. The crew could use the rovers as living quarters and as vehicles to conduct scientific exploration of the Moon, then return to the PEM for resupply, maintenance, and evaluations of collected samples. As with the rovers, HF engineers want to understand how the volume and architectural layout of the habitat works for the crew while they are performing normal working tasks and interacting with all types of technology.

Analyzing rock sample

Crew members working in the geology glove box getting ready to analyze a rock sample.

Building a sensor

A crew member builds a solar powered temperature and water sensor.

By understanding how humans and machines interact with each other, human factors engineering in collaboration with vehicle design engineering can capture information on the design and present recommendations on how to improve the design to enhance the crew member’s performance and comfort. Information provided by HF engineers lends confidence to future planetary vehicle design. Field trials such as Desert RATS give HF engineers a more realistic testing environment to investigate the various elements of habitation.

Desert RATS Intern Blog: Week #1 of DRATS 2010

By Kevin Buckley and Courtney Gras, Moon Work Interns
Kevin recently earned his bachelor of science degree in aerospace engineering from the University of Maryland. Courtney is an electrical engineering major at the University of Akron, and starts a co-op term this fall at NASA’s Glenn Research Center.

Week 1

August 31 to September 5 was the first week of the rover traverse. On Tuesday, everything we had been setting-up and preparing for came together. The base camp was very busy – the Mobile Mission Control Center was full of engineers and scientists communicating with the rovers and the ground crew as everyone was working to make sure everything started on time and according to plan.

In the mornings, we ran the Mission Management Team (MMT) meeting with all of the team leads. The purpose of the meeting (held every morning and every evening) is to see where each team is with their objectives, and determine if there are any changes to the plan.

Mission Management Team

The MMT morning meeting for Mission Day 1.

Throughout the week, we supported different parts of the traverse. We had the opportunity to help the science team with the Gigapan camera and participate as test subjects for the Habitat Demonstration Unit (HDU).

As the week progressed, we were able to see the differences between two different kinds of communication that were being tested – constant communication with the rovers and two-a-day communication. It was interesting to see how the different communication methods influenced the mission.

Desert RATS Mission Day 4: Crew Blog – Living in the Lap of Luxury

By Dr. Jim Rice
Dr. Jim Rice is an Astrogeologist working at NASA Goddard Space Flight Center. For the 2010 Desert RATS field test, Dr. Rice will be the geology crew member on rover A in week one, as well as a member of the science backroom for week two.

Friday, September 3

I was just thinking today about our living conditions onboard Rover Alpha and how easy we have it compared to the Apollo astronauts who landed on the moon.

The last three Apollo lunar landing missions (Apollo 15-17) had a small lunar rover with them. However, their rover wasn’t pressurized, meaning that they had to wear their spacesuits the whole time they were on Extra-Vehicular Activities (EVAs) (moonwalks and yes even the moondrives:-). Their EVAs typically lasted between 6-8 hours. When the Space Exploration Vehicle goes to the moon, Mars or asteroids it will be pressurized and the crews will not have to wear their space suits except when they go EVA!

Living in the rover these past four days has really made me appreciate even more what the Apollo crews went through on the lunar surface. We have a nice roomy rover that has even more room than the Lunar Module (LM) where they lived and slept for 3 days during their lunar missions. We even have full length sleeping quarters (I am 6’3″) and lots of room inside Rover Alpha. We get to drive in our street clothes pretty much, and cover much more territory than the Apollo crews. They had to return to the LM located at the same spot every day. We can roam and do not have to return to a set location since we are a home on wheels. We cover much more territory and distance covered translates into maximized scientific gain.

Our simulated mission living and conducting EVAs from the SEV is helping lay the foundation for crews of the future in exploring other worlds. Wow what a thrill this has been!

Rover and Portable Utility Pallet

The Rover pulling along the Portable Utility Pallet (PUP).

Desert RATS Mission Day 4: Crew Blog

By Chris Looper
Chris Looper is Chief Engineer of the EVA Branch of the Astronaut Office, and is splitting time as a test subject and as Traverse Director of Desert RATS 2010.

Friday, September 3

Day 4 was our first day of traverses with communications only between the two rovers, except for a morning and evening briefing with the Mission Control Center (MCC) at Base Camp. It was fun just as the previous days were and interesting to be testing a different mode of operation.

It really seems the terrain you are exploring and your overall objectives for your mission will dictate to you the best mode of operation for using two rovers. Jim and I are getting better at how to work together addressing a rock outcropping. The training we are getting is something that a real exploration crew would get over a long period of time. We can sense the learning curve as we figure out ways to try to be more effective. It is obviously a huge learning experience for me (being an engineer) since, even though I have some graduate level course history in geology, I have no field experience at all, nor any field training except for what I was able to pick up in previous Desert RATS tests.

Luckily, I enjoy few things more than walking around in nature observing all there is to see. All the different aspects of geology are interesting although the terminology is difficult to retain unless you are immersed in it in your everyday work life. I have learned that one of the keys to good field geology is simply being observant of those things relevant to what you are trying to understand and describing what you see. We are over halfway done on our 7-day traverse and looking forward to the days ahead.

Chris Looper shows how the crew moves from inside of the rover to the suit port in preparation for a spacewalk:

Chris demonstrates putting on the life support vests used during the “shirt-sleeve” Extra-Vehicular Activities (EVAs):

Desert RATS Mission Day 3: Crew Blog – The Value of Field Geology

By Dr. Jim Rice
Dr. Jim Rice is an Astrogeologist working at NASA Goddard Space Flight Center. For the 2010 Desert RATS field test, Dr. Rice will be the geology crew member on rover A in week one, as well as a member of the science backroom for week two.

Thursday, September 2

Some of you may be asking, why are the crews doing all this field geology on their traverses? Well, that’s a good question, so let me give you my take on the importance of doing field geology on future NASA manned missions of exploration to the moon, Mars and/or asteroids.

First of all, fieldwork is the foundation of all geological studies, ranging from the interpretation of geochemical data to the creation of geophysical models. Without detailed observations of field relationships between collected samples, and an understanding of the geology in the region of interest, all other data cannot be interpreted correctly. Fieldwork is essential to the study of geology.

Conducting field geology is equivalent to law enforcement agencies performing crime scene investigations, which have been popularized by the TV series CSI. You see, a field geologist goes about his work in much the same manner. Although the geologist uses different tools and techniques, he still must be meticulous, detail oriented, curious and dedicated. If a geologist is well versed in the art and skill of field geology, then he can read rocks and the landscape like the pages in a book.

Indeed, to the trained field geologist, each rock and landscape records evidence of the geological history of a region. Thus, the field geologist is the most qualified person to have the honor of reading the geological history book of a region. When we explore the surfaces of other worlds, we are first and foremost doing field geology. Therefore, astronauts must be trained to be field geologists in order to maximize the science return of future missions. Field geology cannot be learned in a book or laboratory. One must go into the field. There is an old expression that says the best geologist is the one who sees the most rocks. Simple, but oh so true!

Desert RATS crew member and rock formation

A Desert RATS crew member in the midst of a stunning rock formation in the Arizona desert.