Spirit cleaner? |
Spirit cleaner? |
Jun 18 2007, 06:44 AM
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
I've been keeping an eye on the sundial images looking for signs of a cleaning event. I've noticed some changes in the latest to be downloaded although they may be due to changes in the lighting.
A : clean patch at top of circle streak at bottom B : increased contrast from dust left behind next to mirror C : clean patch next to wire Also note the missing clumps of dust on the deck A broader view show a contrast between sol 1221 and 1227 http://207.7.139.5/mars/spirit/navcam/2007...I4P0165L0M1.JPG http://207.7.139.5/mars/spirit/navcam/2007...00P1914L0M1.JPG Has anyone heard if there has been a change in the power levels? |
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Jun 29 2007, 03:14 PM
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
The best they could do for the day that insolation is lowest ( around Ls 95 ) is to tilt to ~34.6deg facing due north , that would result in about 31% more power than a horizontal panel on the same sol.
The initial tilt angle at Low Ridge was 10.8deg which gave them about 15.7% more power than a horizontal panel on that day. 34 degrees is probably way to dangerous but a 20deg slope should be possible and that would yield a 25% increase in power. The exact improvement varies over time as the suns declination changes - the above numbers are really only good for the weeks around mid winter. |
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Jun 29 2007, 03:58 PM
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#3
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
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