At our morning meeting, Commander Zubrin briefed the team on our EVA activities and objectives. An initial pedestrian EVA was aimed at exploring the surrounding terrain and obtaining samples and various environmental and geographic measurements of geologically and biologically interesting sites. An ATV EVA was to be performed later in the afternoon for exploration of a more distant region. Four crew members were initially assigned to the initial pedestrian EVA but during our suit up procedure we discovered that only three of the EVA backpacks were properly charged. Given this situation the second EVA was eliminated from the agenda and only three people were able to conduct the pedestrian EVA. Troy Wegman, Jen Heldmann and Heather Chluda began preparations to leave the Habitat on this mission.

Jen, Troy, and Heather suited up in the EVA suits with the assistance of Robert, Steve, and Frank. This process went fairly smoothly and took approximately 1 hour 20 minutes. This procedure was photo documented by our crew as well as a visitor from the Philadelphia Inquirer. Once the EVA team was ready, they entered the air lock for depressurization for 5 minutes. Upon completion of this procedure, the team egressed for the EVA.

The EVA team (and photographer) started their trek heading out at 80 degrees NEE. The goal of this mission was to provide ground reconnaissance of a region eastward of the Habitat in the nearby hills that are of Jurassic and Cretaceous age. During the initial hike out to the primary region of interest, notable sites for potential sample collection were noted and marked as waypoints on the GPS tracking system.

Once we reached our main destination after approximately 45 minutes, we began sampling from the base of the smooth ‘mountain’. The primary surface coating of the ‘mountain’ was removed to reveal multicolored layers of soil. Troy collected samples of this soil in sample containers. Heather recorded the GPS coordinates and elevation of the site while Jen took incident light intensity measurements and digitally imaged the sample area. The GPS coordinates of this waypoint (6) were as follows: 38( 23.98’ N, 110( 46.84’ W. Also, the crew aligned a measuring tape in a North-South direction (casing of the measuring tape marks South) and imaged the measuring tape. At subsequent sites we imaged the length of the shadow cast by a rock hammer for scale and sun orientation calculations, respectively (length of the rock hammer is ~11 inches). We also collected biological samples at these locations. All of these measurements were also performed at all the other sample sites.

Samples were collected at a variety of biologically interesting sites. All the samples were sampled from the exterior top surface of the rock formations. When splitting open rocks, looking underneath them, or looking in rock crevices, no apparent biological growth was visible by our team. Future efforts will focus on visualizing these specific rock areas. The samples we collected appear to be lichens or algae. Their colors were orange, blue/gray, or black. The following four sites were observed at length, and 6 total samples were obtained:

• Waypoint 5: 38( 24.05’ N, 110( 46.89’ W: blue/gray and black biological growth sample. Light meter reading: 62.
• Waypoint 6: see above. Geological sample. Light meter reading: 59.
• Waypoint 7: 38( 23.97’ N, 110( 46.79’ W: orange, blue/gray, and black biological growth samples. (3 samples). Light meter reading: 65.
• Waypoint 9: 38( 23.67’ N, 110( 46.88’ W: blue/gray biological growth sample (on green rock). Light meter reading: 62.

Pictures at these waypoints are in the process of being downloaded, named, and filed.

The GPS tracking system was used as a navigation tool for the entire EVA. It tracked our route away from and back to the Hab. We traversed through wash areas, around rocky fields, and bouldered our way up and over the smooth ‘mountain’. Our minimum-recorded elevation was 4417 ft and the maximum elevation was 4592 ft. GPS coordinates and elevation measurements were also recorded at each sampling site along with additional recorded waypoints (not mentioned above). Our total mileage recorded was 3.1 miles. This measurement was line-of sight distance no travel over the surface mileage that would have taken into account the elevation changes. This traverse for EVA I was recorded on the GPS system and will be mapped on a 3D topogragraphic software: 3-D TopoQuads.

Wearing spacesuits during EVA activities helps to simulate the working conditions that will be faced by future Mars explorers. The suits are rather bulky and thus limit movement and increase fatigue. Manual dexterity is also compromised by the bulky gloves, and so creative ways of working with equipment and gathering samples must be developed. For example, the end of a rock hammer was used to push buttons on the GPS, and the aid of another crew member was extremely useful for changing the radio channel on one’s radio control. Despite the added challenges imposed by the EVA suit, the fieldwork was extremely successful, and the crew was able to meet its objectives without too many difficulties.

The most trying operational parameter during the EVA was the use of the communications system. Troy’s headset was operational only about one-third of the time; therefore, he could not hear or talk to his fellow EVA crew members or Capcom. We developed other useful means of communication including gestures (head nods and thumbs up/down worked very well), and we also yelled through our helmets so the other EVA crew members could hear and respond. There were also some problems communicating with the Hab via the repeater when we were located behind a large obstacle such as a ridge or large hill. This problem was typically alleviated when we moved within a better range of the repeater.

Weather conditions today were generally favorable. High winds were encountered which made operations more challenging. The wind disrupted some of the communication and so at times we were forced to find a small alcove out of the wind such that we could converse and determine our next course of action. The wind was also a factor during sample collection as the wind-blown dust tended to accumulate in our instruments and also slightly impeded collection efforts because it was more difficult to loosen samples and successfully transport them to the sample collection bags. High wind conditions were intermittent, however, and did not stop any of our planned activities.

Continuing EVAs will continue to survey the surrounding terrain. In particular, ATV surveys will be further ranging. Weather monitoring equipment will be deployed to allow further environmental monitoring. Exploration will increase familiarity of the area and lead to many more interesting discoveries of the spectacular terrain.