Might I suggest a snorkel? It'll give you an extra 6 inches of depth if you need it. Glad to hear it's all OK.

I feel sorry for the guys in Gloucester - that could turn into a very nasty situation if the water isn't sorted VERY quickly. I used to live in those parts ( up a big hill, thankfully ) but farmers and other animal owners are in real trouble.

Doug

Per the rovers - the condition has been just about static for 7 sols.

Doug

That's OK - I turn 30 next year

Doug

Sort of :
http://www.ominous-valve.com/pancam.html

Doug

If you stand in the middle of the UK - most of the time the weather is crap enough to see you own hand...but that's about it.

Doug

Not noticed a damn thing here in Leicester - just lots of pictures of half of Gloucestershire being brown instead of green on the news. The southern half of the country will get trench-foot if it doesn't dry out soon

http://trs-new.jpl.nasa.gov/dspace/handle/2014/38695 - that the link to Tracy's PDF about fault protection.


Doug

Yeah - err - the one I was reading was on the JPL technical reports server

Doug

05-2866.pdf (google) is a document by Tracy Neilson that talks about all the fault modes.

A totally flat battery - or as the fault would be classified, Battery failure - would result in a loss of mission clock and the vehicle trying to figure out local noon for itself and opening X-Band windows at that time.

Doug

....in your opinion.

It's time to bring this thread to a close.

Because being flat on the plain you get the maximum indirect illumination of the arrays by the dust. On a slope - that will drop off (which every direction the slope is)

With clear skies and 800 Whrs, it doesn't really matter given that the slope runs down to the East (better power in the morning, but lower power in the evening) but with almost all the power currently coming from the difuse route - you want to be flat as you can.

Doug

I spotted what I think is some CRISM Deimos obs in the uplink listings

0865555235:4 2007-157T00:00:16 ri3961 r01crm_deimos_cal2.mod 0x9e7c2dcb d:/seq/crm_deimos_cal2.mod OVERWRITE

Thats it's second Deimos observation - hopefully some results will hit this conf.

Doug

Well - I think it is - what's the actual file name of any one of the three files involved? Somewhere out there ( and I can't find it now..grrr) is a website where you drop the file name in and it converts it to the information for you. That - or using MMB - will tell you when the image was taken.

Doug

Looks like the removal of a lighter coloured crust rather than any sort of staining to me. Some MI's would help.

The last horizon survey image ( which I think is the one you've posted there ) was actually from 1235, 8 sols ago - and is infact - when calibrated - the darkest slice of this cake
http://marsrovers.jpl.nasa.gov/gallery/pre..._horizon_br.jpg


Doug

Mark's updated the figures a little

We're now at the point in the decay where during the last decay - we had another outburst.

Doug

Extraordinary. People have been asking me 'how long can they hibernate' - and under these sorts of conditions, it would seem the answer is basically however long they need to. The systems design - although never designed to - can handle this beautifully.

Doug

NICE

Doug

That's just renered from the Blue Marble data set. Nice - but not real

Doug

Ahh - so actually - things are better than I thought they might be. Still a bit crap - but not quite as doom and gloom as I thought.

I'm going to plough through the JPL TRS search again and see if I can't understand and interpret this at a system level a little better - BUT - I think this may be the sort of flow of things as I understand them. I'm still not sure whever the cut-off of deep sleep is though.

Obviously ITAR has both hands firmly around the neck of any detailed info on this stuff - BUT - from here :
http://hobbiton.thisside.net/rovermanual/
specifically here
http://newport.eecs.uci.edu/impacct/d_rese...-PACC092600.ppt - very very out of date but I'm sure the figures are still roughly accurate
Suggests the 'battery charger board' ( I assume the battery controller board which you refer to) pulls 200mW - <5Whrs / sol.

Rovers are complicated.

Doug

John's a hoot - I was fortunate enough to see a lecture by him about Huygens a few years ago ( and I asked a really good question afterwards which he was impressed by ) - he's the best thing in UK space science to match the likes of Jim, Steve, Alan etc.

Doug

The PDS stopped providing stuff on physical media I think - with MGS. I've been speaking to the UK RPIF (well, Pete) about mirroring PDS stuff in the UK for faster UK access, or allowing access to it via the RPIF for burning onto Physical media.

Doug

There are so many derived data sets of different sorts of end product that the total probably runs dozens of GB's.

Most Navcam, Hazcam and Pancam frames end up with mant different treatments, in a range from 2mb to > 10MB - perhaps as much as 20MB/image from all the derived products. With 250k images - that's 5TB I think.

The basic radiometric set of pancam image at 125,000 images of 2mb each - 250 Gbytes.

Doug

Thanks for the update Mark.

If the circuitry is such that it can charge even without an array wake up - will each sol be, technically, power positive?

Doug

http://trs-new.jpl.nasa.gov/dspace/handle/2014/39793

Very interesting stuff - well worth reading.

Doug