EVA Report – February 28th

Crew 263 EVA Report 28-02-2022

EVA # 9

Author: Valentine Bourgeois

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 at the same place.

Batteries for the LOAC, the Electrical Field Mill, Purple Air and Mega-Ares needs to be changed daily. The Electrical Field Mill and Mega-Ares share the same battery. Hence, during this maintenance EVA, the 3 batteries needed to be replaced.

Start time: 08:58

End time: 09:35

Narrative: EVA Participants entered the airlock at 08:58. Depressurization ended at 09:03. 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 09:09. The 3 batteries were replaced. Lea and Valentine changed the LOAC battery and changed the SD card to collect data. Valentine changed the Purple Air Battery and Nicolas changed the Electrical Field Mill and Mega-Ares batteries. The status of the devices was checked and we realized that the Electrical Field Mill was not working anymore. The three of us have dismounted it to bring it back to the station for maintenance.

At 09:25, the participants left the atmospheric experiment location.

At 09:29, the participants arrived at the Hab and entered Airlock.

09:35, pressurization over.

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

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

Participants : Valentine Bourgeois (EVA leader), Nicolas Wattelle, Léa Rouverand. HabCom was Marine Prunier.

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

Mode of travel: Foot