Operations Report – May 4th

Crew 265 Operations Report Sol 10 04-05-2022

SOL: 10

Name of person filing report: Dave Laude/Sergii Iakymov

Non-nominal systems: Furnace. Room#2 doorknob. Percy left rear tail light is non-functional but the brake lights working.

Notes on non-nominal systems: Furnace is functional and we remain cautious limiting to day use only. Doorknob feels like it’s about to fail.

ROVERS
Spirit rover used: No
Hours: 179.5
Beginning charge: 100
Ending charge: 100
Currently charging: Yes

Opportunity rover used: Yes
Hours: 97.6
Beginning charge: 100
Ending charge: 98
Currently charging: No

Curiosity rover used: No
Hours: 190.6
Beginning charge: 100
Ending charge: 100
Currently charging: Yes

Perseverance rover used: Yes
Hours: 239.6
Beginning charge: 100
Ending charge: 78
Currently charging: No

General notes and comments:

Summary of Hab operations:

WATER USE:
Water (static tank): Not full. ~200 gallons.
Water (loft tank): 33 gallons
Water Meter: 158315 units

Static to Loft Pump used – Yes
Static tank pipe heater (on or off): Off
Static tank heater (On or off): Off
Toilet tank emptied: No

Summary of internet: Nominal

Summary of suits and radios: Batteries charging.

Radio battery capacity testing has ended. 5 have >= 80% of new capacity that I call "Good" and 6 have >=60% and <80% that I call "Fair". None were <60%. Test results are on a label sticking to each battery.

For Scott Davis: I tried setting the one-piece suit #9 waist belt one notch lower (Lowest) and found it helpful in reducing shoulder weight to an acceptable level. Also, a good way to prevent over-discharging of the batteries and thus extending life is to use an electronic switch with an under-voltage cut-off with hysteresis for the fans (cutoff around 11.7V or ~ 90% discharged).

Summary of GreenHab operations: NA

WATER USE: N/A

Heater: N/A

Supplemental light: N/A

Harvest: None

Summary of ScienceDome operations: Not used.

Dual split: Heat or AC, On or Off

Summary of RAM operations: None

Summary of any observatory issues: NA

Summary of health and safety issues: All crew members are feeling good.

Questions, concerns and requests to Mission Support: Per Sergii’s calculation and comparison to the known static tank volume the water meter is pretty accurate. The meter is only 2.5% off on its readings from our calculated water usage.

Also, Dave has devised a method of more accurate water gauging of the static tank and verified by Sergii. It involves lowering a tape measure end down to just above the surface of the water. One will see the reflection of the tapes and easily know when to stop.

The distance from the top of the black rim to the surface is measured in meters and a simple formula is applied. It has been verified by calculation of a full tank to be 555 gallons, not to the rim, but to where the tank’s upper portion suddenly curves inward. Also, by use of the now known accurate meter.

Vol(gallons)=642-600H where H is the measure reading in meters (I know I’m mixing units of measure. It can be converted to any units).

It should be noted that the bottom 5cm (a guess) is not included as the pump will need some depth to work.