EVA Report – March 5th

Crew 263 EVA Report 05-03-2022

EVA # 16

Author: Valentine Bourgeois

Purpose of EVA: Atmospheric Experiment Battery Change and reorientation of the antennas.

The atmospheric experiment includes 5 devices: LOAC (Light Optical Aerosol Counter), an Electrical Field Mill, Purple Air (Aerosol Counter), Mega-Ares (Electrical Field Counter) and a Weather station. The aim of this experiment is to do testing of Martian-Atmospheric Study Equipment and their maintenance by human operators. Performing their maintenance and set-up while wearing spacesuits and following EVA protocols is the purpose of the experiment. All devices are located at the same place.

Batteries for the LOAC, Mega-Ares and Purple Air need to be changed daily. Hence, during this maintenance EVA, the 3 batteries needed to be replaced. As there is a chance of snowing tonight and tomorrow, we also decided to bring the LOAC back to the station as it might be damaged by the snow.

Start time: 10:36

End time: 11:28

Narrative: EVA Participants entered the airlock at 10:36 Depressurization ended at 10:41. EVA participants checked the rover batteries just in case. The obtained information is:

Perseverance: Usage Duration – 228.1 Battery Charge – 100%

Spirit: Usage Duration – 157.2 Battery Charge – 100%

Opportunity: Usage Duration – 85.2 Battery Charge – 100%

Curiosity: Usage Duration – 169.2 Battery Charge – 100%

The EVA participants arrived at the Atmospheric Experiment location at 10:46. The 2 batteries were replaced. Marine turned off the LOAC and disconnected the battery. Nicolas changed the battery of Mega-Ares and protected it with a second garbage bag. Valentine found some rocks to elevate the battery in case of snow tomorrow. Léa changed the Purple Air battery. The status of the devices was checked.

At 10:52, the participants left the atmospheric experiment location. With two old batteries and the LOAC. They have been placed in front of the air-lock to continue the EVA. We went to the antenna to fix it.

At 10:55, the participants arrived at the antenna location. Because of the wind the antennas have changed their orientation. We fixed it and place some more ropes and rocks to keep them from doing it again.

When we were almost done, Valentine’s earphone broke. She couldn’t hear anything but her teammates where able to hear her. We finished to fix the last rope and went back to the Hab. We took the old batteries and the LOAC with us to go back to the air-lock.

11:23 pressurization over.

Destination: Atmospheric experience site (at intersection between Cow Dung Road and Entrance Road) and the antenna site

Coordinates (use UTM NAD27 CONUS): 518288 E, 4250586 N

Participants :Valentine Bourgeois (EVA Leader), Léa Rouverand, Nicolas Wattelle and Marine Prunier

Road(s) and routes per MDRS Map: Entrance Road

Mode of travel: Foot