Help Shape the Future of Space Exploration

Join The Planetary Society Now Join Now!

Join our eNewsletter for updates & action alerts

   Please leave this field empty
Blogs

Headshot of Emily Lakdawalla

A little good news on the rovers

Posted by Emily Lakdawalla

08-08-2007 10:56 CDT

Topics: Opportunity, Spirit, mission status, Mars Exploration Rovers, Mars

The skies aren't quite as dark as they have been, for both Spirit and Opportunity. In fact, Spirit has enough power now to be doing a little work with its robotic arm. This news is from a press release issued last night. On Spirit's sol 1276, energy production was up to 295 watt hours. On Opportunity's sol 1255, energy production was up to 243 watt hours. For Opportunity, the power improvement was particularly welcome, because of concerns last week about the rover's falling core body temperature. The good news is that the temperature has increased from -37°C to -33.4°C; it seems there's now enough power for Opportunity to avoid tripping either its survival heaters or a low-power fault.

Here are Mark Lemmon's latest figures on atmospheric opacity, graphed by Doug Ellison:

Atmospheric opacity (tau) for Spirit and Opportunity during the 2007 dust storm

Data from Mark Lemmon / Graph by Doug Ellison

Atmospheric opacity (tau) for Spirit and Opportunity during the 2007 dust storm
For both rovers, typical values of atmospheric opacity, or tau, hover between 0 and 1. During June and July of 2007, dust storms lofted dust into the atmosphere, increasing the opacity to never-before-seen values above 5. At these levels, less than 1% of the sunlight that impinges on the top of Mars' atmosphere reaches the rovers' solar panels.
 
See other posts from August 2007

 

Or read more blog entries about: Opportunity, Spirit, mission status, Mars Exploration Rovers, Mars

Comments:

Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Blog Search

JOIN THE
PLANETARY SOCIETY

Our Curiosity Knows No Bounds!

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Us

Featured Images

NavCam view of comet Churyumov-Gerasimenko on August 31, 2014

South Georgia island
ATV-5 and a waning moon
Moscow at night
More Images

Featured Video

View Larger »

Fly to an Asteroid!

Travel to Bennu on the OSIRIS-REx spacecraft!

Send your name

Join the New Millennium Committee

Let’s invent the future together!

Become a Member

Connect With Us

Facebook! Twitter! Google+ and more…
Continue the conversation with our online community!