Eva Report
05/12/2013
Steffan Slater
Eva Number:
11
Eva Date:
2013-05-12
Time Slot:
laterAM
Purpose:
Objective of EVA was to repair repeater previously placed on ridge near Hab - battery died after EVA yesterday. Solar charging system to be installed to maintain battery charge and enable continuous repeater operation.
Narrative:
EVA 11 was lead by Steffan Slater, Doug Trent served as navigation and technical lead, and Matthew Schumann served as technical support. Hab was departed at 10:33 AM and solar charging system (panels and charge controller) were transported up to hill to repeater location (installed in earlier EVA), arriving at 10:41 AM. Charging system was installed, with frequent voltage/current checks to ensure electrical system was operating within acceptable and safe limits. Repeater was restored to functionality at 11:02 AM and HabCom made the switch to repeater operation at that time. Checks of voltage and current during transmission were made as well to validate estimates made during preparation on the night of 5/11/2013. Due to level of battery discharge, the decision was made to disconnect the repeater for the duration of the day to guarantee battery charging. Repeater will need to be turned on before any future long-distance EVA's, but should be able to operate continuously. Due to decision to turn off repeater, later repeater range test EVA was not performed. Evaporation experiment collection scheduled for EVA 12 was instead performed after return from repeater location. Hab was re-entered at 11:32 AM.
Eva Depart Time:
10:32
Check In Time One:
10:41
Check In East One:
518002
Check In North One:
4250708
Check In Note One:
Top of hill - repeater repair begun
Check In Time Two:
11:02
Check In East Two:
518002
Check In North Two:
4250708
Check In Note Two:
Switch to repeater frequency for testing
Check In Time Three:
11:26
Check In East Three:
518002
Check In North Three:
4250708
Check In Note Three:
Depart top of hill - repeater repaired
Check In Time Four:
11:30
Check In East Four:
518295
Check In North Four:
4250496
Check In Note Four:
Evaporator collection
Eva Return Time:
11:32
Wp1 E:
518002
Wp1 N:
4250708
Waypoint1arrive Time:
10:41
Eva W P1depart Time:
11:26
Wp1 Find:
Repeater successfully repaired
Wp2 E:
518295
Wp2 N:
4250496
Eva W P2arrive Time:
11:30
Eva W P2depart Time:
11:32
Wp2 Find:
Evaporator collected
Wp3 E:
Wp3 N:
Eva W P3arrive Time:
Eva W P3depart Time:
Wp3 Find:
Wp4 E:
Wp4 N:
Eva W P4arrive Time:
Eva W P4depart Time:
Waypoint Four Finding:
Waypoint Five Easting:
Waypoint Five Northing:
Waypoint Five Arrive Time:
Waypoint Five Depart Time:
Waypoint Five Findings: