Cape Tribulation, Sol 3744 (6Aug'14) - Sol 4077 (15Jul'15) |
Cape Tribulation, Sol 3744 (6Aug'14) - Sol 4077 (15Jul'15) |
Aug 6 2014, 09:30 PM
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#1
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
The ~85m drive on sol 3744 was uphill, starting the long climb of Cape Tribulation.
The sol 3744 Drive: Puts Opportunity about here on a plot with colour for elevation: The view ahead: -------------------- |
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Aug 30 2014, 06:30 AM
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#2
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Member Group: Members Posts: 399 Joined: 28-August 07 From: San Francisco Member No.: 3511 |
With flash memory disabled, is driving possible?
I recall those tense Spirit flash days when Peter Theisinger was calming us all down...quite rightly... -------------------- 'She drove until the wheels fell off...'
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Aug 30 2014, 09:19 AM
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#3
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Member Group: Members Posts: 206 Joined: 15-August 07 From: Shrewsbury, Shropshire Member No.: 3233 |
With flash memory disabled, is driving possible? I recall those tense Spirit flash days when Peter Theisinger was calming us all down...quite rightly... If command sequences are stored in different flash memory to that used to store data then I suppose that a 20m blind drive would be possible each day followed by each camera taking one picture at the end of the drive. These 8 pictures could then be transmitted to Earth at the end of the day's 20m drive without ever being stored in data flash memory. I imagine that it is also possible to instruct Opportunity to do something immediately over its direct Earth link without sending this instruction as part of a command sequence. It therefore might be possible to tell Opportunity to drive a few meters without making this command part of a sequence. |
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Aug 30 2014, 01:15 PM
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#4
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
If command sequences are stored in different flash memory to that used to store data then I suppose that a 20m blind drive would be possible each day followed by each camera taking one picture at the end of the drive. These 8 pictures could then be transmitted to Earth at the end of the day's 20m drive without ever being stored in data flash memory. I imagine that it is also possible to instruct Opportunity to do something immediately over its direct Earth link without sending this instruction as part of a command sequence. It therefore might be possible to tell Opportunity to drive a few meters without making this command part of a sequence. When the rover is in crippled mode we use part of the RAM as a file system and am not sure that the remaining RAM would support driving with the additional buffers we need for imaging and all that. And driving in real time? No way! The OWLT (One Way Light Time) varies from 5 to 20 minutes, communications take a LOT of power and takes time to switch between driving and communicating. We sometimes have very lengthy discussions on where to drive, how, what safety parameters to set. Just think yourself driving in a foreign country, no maps, with your mother-in-law providing "suggestions". How long would you last at the wheel? Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Aug 30 2014, 03:15 PM
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#5
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Member Group: Members Posts: 148 Joined: 9-August 11 From: Mason, TX Member No.: 6108 |
Just think yourself driving in a foreign country, no maps, with your mother-in-law providing "suggestions". How long would you last at the wheel? You, sir, are a driver of great patience and a master of diplomacy. -------------------- --
Don |
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