EVA Report – February 26th

Crew 263 EVA Report 26-02-2022

EVA # 6

Author: Marine Prunier

Purpose of EVA: Atmospheric Experiment Battery Change

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 in the same place.

Batteries for the LOAC, the Electrical Field Mill, and Purple Air need to be changed daily. Hence, during this maintenance EVA, the 3 batteries needed to be replaced.

Start time: 08:30 am
End time: 09:00 am

Narrative: EVA Participants entered the airlock at 08:33. Depressurization ended at 08:38. 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 – 84.7 Battery Charge – 100%

Curiosity: Usage Duration – 168.7 Battery Charge – 100%

The EVA participants arrived at the Atmospheric Experiment location at 08:43. The 3 batteries were replaced. Marine and Elena changed the LOAC battery. Cerise and Léa changed the Purple Air and Electrical Field Mill batteries. The status of the devices was checked.

At 08:50, the participants left the atmospheric experiment location.

At 08:55, the participants arrived at the Hab and entered Airlock.

09:00, pressurization over.

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

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

Participants : Marine Prunier (EVA Leader), Léa Rouverand, Cerise Cuny, Elena Lopez-Contreras Gonzalez. HabCom was Nicolas Wattelle.

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

Mode of travel: Foot