Brief Summary: There was one EVA today, with the pressurized rover to Tank Wash, collecting desert varnish samples and taking Mars analog images for Gregorio's project. ATV-2 has a problem with the exhaust, and we were advised not to use it. Going out alone would be risky, so some of us did much peering from the portholes instead.

Purpose: Take pictures of Mars analog sites, collect desert varnish samples, test the Dewey Cooling Vest and improvised digital camera viewfinder hood.

Participants: Gus Frederick, Greg Drayer

Duration: 1215 - 1430 (2.25 Hrs.)

Weather: Cloudy

Maximum distance from Hab: 4.36 km

Route: Up Lowell Highway to where it interesects Tank Wash, E518233 N4253582 NAD27 then we proceeded on foot East down Tank Wash to E518559 N4253711 NAD27. We then proceeded several hundred meters North to E518608 N4253746 NAD27.

Description: For this sortie, I wore the Dewey Cooling Vest and relocated the Hobo datalogger sensors in a different arrangement than our previous tests. Sensor placement was as follows:

• Sensor 1: Mid Torso Front under Vest
• Sensor 2: Mid Torso Back under Vest
• Sensor 3: Inside Helmet
• Sensor 4: Outside exposed to the air

I also constructed a viewfinder hood for my digital camera, to attempt to decrease light glare and increase visibility with the Mars Suit helmet on.

We were accompanied by Associated Press photographer Doug Pizac out of Salt Lake City. After suiting up and airlock proceedures, we got in the back of the Pressurized Rover and with our Automous Photo Droid Steve driving, we headed up Lowell Highway to where it interesects Tank Wash. Then we proceeded on foot East down Tank Wash to several analog sites identified earlier by Gregorio for pictures. We then proceeded several hundred meters North up a side wash to an out cropping of large rocks where I collected several desert varnish samples and took photos for Dr. Boston's research. Increasingly bad weather cut our mission short, and we returned along the same route back to the Hab.

Lessons Learned: The Dewey vest did seem to keep me cooler than my two previous EVAs, (Figure 1 above). It was at first a bit chilly wearing it, but after suiting up, it kept me quite comfortable. The viewfinder however was not as efficiant as I had hoped. It was still quite difficult to see the screen, and I often had to duck down in the shade of a rock when setting the camera on macro mode. For the most part, I simply pointed the camera in the general direction and shot.