It takes a lot of delta v to get to Mercury and orbit the planet, so multiple sling shot manuvers were done to keep the cost of the probe from being excessive. Neil
Yes I can make a hard copy of pictures and text I put on slashdot, and other websites, but the copies get lost, the websites purge the old stuff or disappear completely. My computers loose the stuff on them about once per year. Redundant times 4 or 5 is costly and/or time consuming. Even deciding what we want to keep long term is time consuming. there does not appear to be any good solution. Neil
I suspect the power of green house gasses has been seriously exaggerated by the green house warming crowd. Thus: The Equator of Mars would not be tropical (temperate perhaps) even if Mars had an atmosphere like Venus. That likely means nearly all the water would be traped in the ice caps at the poles if we terriform now.
It is thought that the sun was hotter 4.6 billion years ago as a proto-sun, but that it cooled shortly after it went main sequence; likely before the bombardment ended. The last 4.5 billion years we think the sun has been gradually getting warmer, so Earth-like for Mars is unlikely any time in the last 4.5 billion years. Our theories may be wrong, and Mars may have had a comfortable climate as resently as a century ago.
I expect we will find extremeophile micro organisms below the surface of Mars; but intelegent life is unlikely unless we are victums of a massive dis-information campaign. Neil Please try to make serious rather than funny comments.
Permanent shade is about as common on the Moon as on Earth, as all parts of the moon get sun light on a different schedual, but about the same average as Earth. Permanent shade is rare small areas, and lasts a few million years as the geographic poles of both bodies move over the long term.
In my opinion polar ice on the moon, even in permanent shade would be gone in a million years, likely much less, because of energetic ions and photons from beyond our solar system. Most of the Earth-shine photons are not energetic enough to decompose ice at minus 250 degrees f and more than half of the permanently shaded areas from the Sun would also be permanetly shaded from Earth-shine. Neil Please minimise the funny comments.
I did not think the original post made clear whether interference means small positioning errors or difficulty getting any readings from some of the GPS receivers. Also is an array 3 receivers or 300 or something in-between?
If the data is from a satellite that is changing altitude one meter per second, due to shock waves from the earthquake we should expect plus or minus one meter errors due to dopler shift of the satellite signal, if for no other reason.
I presume data is typically from a GPS satellite over Southern Alaska, or The Yukon for receivers in Northern California.
Is it typical for a GPS receiver to compare data form three satellites per reading?
I should think-under ground nuclear tests would produce shock waves, similar to weak small area earthquakes, so systen noise and coronal mass ejections from the sun may mask nuclear tests unless very high yield. Neil
Hi grab; Please indulge me. This is my frist comment on slashdot which seems slow. Does this mean I can buy an engine controller for my 95 Ford Windstar and my 96 Ford Ranger for $50 or so and plug it in and expect the vehical to start and limp to a diognostic shop that can optimise the adjustments for me or is inecessary to know what I am doing? Neil
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It takes a lot of delta v to get to Mercury and orbit the planet, so multiple sling shot manuvers were done to keep the cost of the probe from being excessive. Neil
Yes I can make a hard copy of pictures and text I put on slashdot, and other websites, but the copies get lost, the websites purge the old stuff or disappear completely. My computers loose the stuff on them about once per year. Redundant times 4 or 5 is costly and/or time consuming. Even deciding what we want to keep long term is time consuming. there does not appear to be any good solution. Neil
I suspect the power of green house gasses has been seriously exaggerated by the green house warming crowd. Thus: The Equator of Mars would not be tropical (temperate perhaps) even if Mars had an atmosphere like Venus. That likely means nearly all the water would be traped in the ice caps at the poles if we terriform now. It is thought that the sun was hotter 4.6 billion years ago as a proto-sun, but that it cooled shortly after it went main sequence; likely before the bombardment ended. The last 4.5 billion years we think the sun has been gradually getting warmer, so Earth-like for Mars is unlikely any time in the last 4.5 billion years. Our theories may be wrong, and Mars may have had a comfortable climate as resently as a century ago. I expect we will find extremeophile micro organisms below the surface of Mars; but intelegent life is unlikely unless we are victums of a massive dis-information campaign. Neil Please try to make serious rather than funny comments.
Permanent shade is about as common on the Moon as on Earth, as all parts of the moon get sun light on a different schedual, but about the same average as Earth. Permanent shade is rare small areas, and lasts a few million years as the geographic poles of both bodies move over the long term. In my opinion polar ice on the moon, even in permanent shade would be gone in a million years, likely much less, because of energetic ions and photons from beyond our solar system. Most of the Earth-shine photons are not energetic enough to decompose ice at minus 250 degrees f and more than half of the permanently shaded areas from the Sun would also be permanetly shaded from Earth-shine. Neil Please minimise the funny comments.
I did not think the original post made clear whether interference means small positioning errors or difficulty getting any readings from some of the GPS receivers. Also is an array 3 receivers or 300 or something in-between? If the data is from a satellite that is changing altitude one meter per second, due to shock waves from the earthquake we should expect plus or minus one meter errors due to dopler shift of the satellite signal, if for no other reason. I presume data is typically from a GPS satellite over Southern Alaska, or The Yukon for receivers in Northern California. Is it typical for a GPS receiver to compare data form three satellites per reading? I should think-under ground nuclear tests would produce shock waves, similar to weak small area earthquakes, so systen noise and coronal mass ejections from the sun may mask nuclear tests unless very high yield. Neil
Hi grab; Please indulge me. This is my frist comment on slashdot which seems slow. Does this mean I can buy an engine controller for my 95 Ford Windstar and my 96 Ford Ranger for $50 or so and plug it in and expect the vehical to start and limp to a diognostic shop that can optimise the adjustments for me or is inecessary to know what I am doing? Neil