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View Poll Results: For fun, let us know in the poll where you fall.
Upper Class - Elite 6 11.76%
Upper Middle Class 23 45.10%
Lower Middle Class 11 21.57%
Working Class 4 7.84%
Poor - Poverty Level 7 13.73%
Voters: 51. You may not vote on this poll

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Old 08-06-2019, 03:58 PM
 
2,742 posts, read 2,632,449 times
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"The U.S. Department of Defense awarded contracts as early as the 1960s, including for the development of the ARPANET project, directed by Robert Taylor and managed by Lawrence Roberts. The first message was sent over the ARPANET in 1969 from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA) to the second network node at Stanford Research Institute (SRI)."

https://en.wikipedia.org/wiki/History_of_the_Internet
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Old 08-06-2019, 04:16 PM
 
Location: Lone Mountain Las Vegas NV
14,216 posts, read 5,538,737 times
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The internet is complicated and was a consortium entirely in the US. Government sponsored contracts were one of the major assets.

The WWW is much broader and has substantial non US contribution.

GPS is much cleaner. A pure government system that was designed entirely under government contracts and was initially sole use by the government. Clinton chose to allow the system to become a system fully accessible by civilians though still some what less capable than the military version. And it is a good example as the system is pretty well beyond the reach of any corporation.
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Old 08-06-2019, 04:42 PM
 
Location: Southern Highlands
1,578 posts, read 995,890 times
Reputation: 1333
Quote:
Originally Posted by lvmensch View Post
The internet is complicated and was a consortium entirely in the US. Government sponsored contracts were one of the major assets.

The WWW is much broader and has substantial non US contribution.

GPS is much cleaner. A pure government system that was designed entirely under government contracts and was initially sole use by the government. Clinton chose to allow the system to become a system fully accessible by civilians though still some what less capable than the military version. And it is a good example as the system is pretty well beyond the reach of any corporation.

No, Reagan after the KAL007 disaster in 1983.
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Old 08-06-2019, 04:49 PM
 
Location: Lone Mountain Las Vegas NV
14,216 posts, read 5,538,737 times
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Quote:
Originally Posted by Cold Warrior View Post
No, Reagan after the KAL007 disaster in 1983.
Nope. Reagan allowed access but only with selective availability which prevented many uses.

Clinton turned it off later...

*****************************
In May 2000, at the direction of President Bill Clinton, the U.S government discontinued its use of Selective Availability in order to make GPS more responsive to civil and commercial users worldwide.
*****************************
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Old 08-06-2019, 07:25 PM
 
Location: Southern Highlands
1,578 posts, read 995,890 times
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Quote:
Originally Posted by lvmensch View Post
Nope. Reagan allowed access but only with selective availability which prevented many uses.

Clinton turned it off later...

*****************************
In May 2000, at the direction of President Bill Clinton, the U.S government discontinued its use of Selective Availability in order to make GPS more responsive to civil and commercial users worldwide.
*****************************



Irrelevant. Differential GPS is unaffected by SA. Source: myself. I worked on GPS for the Air Force beginning with control segment source selection in 1980.
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Old 08-06-2019, 07:51 PM
 
Location: Lone Mountain Las Vegas NV
14,216 posts, read 5,538,737 times
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Quote:
Originally Posted by Cold Warrior View Post
Irrelevant. Differential GPS is unaffected by SA. Source: myself. I worked on GPS for the Air Force beginning with control segment source selection in 1980.
That may well be your problem. You do not understand the application end.

Differential GPS is usable only in certain applications where the expense and complexity are worth it. It has never been implemented for general use. In fact the only real use I have come across is agriculture.

And for those purposes one could simply build the differential end and skip the GPS. It was actually done in a few instances. I knew a guy who had a mower that cut his back yard using kind of a phase sensitive differential locator in one of the public bands.
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Old 08-06-2019, 08:43 PM
 
Location: Southern Highlands
1,578 posts, read 995,890 times
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Quote:
Originally Posted by lvmensch View Post
That may well be your problem. You do not understand the application end.

Differential GPS is usable only in certain applications where the expense and complexity are worth it. It has never been implemented for general use. In fact the only real use I have come across is agriculture.

And for those purposes one could simply build the differential end and skip the GPS. It was actually done in a few instances. I knew a guy who had a mower that cut his back yard using kind of a phase sensitive differential locator in one of the public bands.

Don't be silly. DGPS has been commonly in use for decades.
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Old 08-06-2019, 09:04 PM
 
Location: Lone Mountain Las Vegas NV
14,216 posts, read 5,538,737 times
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Quote:
Originally Posted by Cold Warrior View Post
Don't be silly. DGPS has been commonly in use for decades.
And still is for certain applications, such as agriculture, where the differential is used to improve the system to where it should have been.

You have a cellphone or a Garmin or a Tom with differential? Cite a source.

I believe the last of the US supported nav differential goes away in 2020.
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Old 08-07-2019, 12:37 AM
 
Location: Studio City, CA 91604
2,882 posts, read 3,206,465 times
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Quote:
Originally Posted by lvmensch View Post
Still absolutely absurd. Graduation with honors from college requires significant intellectual ability. And the Intel competition is fierce and you have to be very bright to win.

You can certainly disagree with OAC. But the simple facts are she is quite bright. You are of course welcome to your own opinions. But you do not get your own facts.
Wanna bet? Don't forget, they've always got "alternative facts"
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Old 08-07-2019, 09:00 AM
 
Location: Southern Highlands
1,578 posts, read 995,890 times
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A tutorial: https://www.trimble.com/gps_tutorial...spx#menu-right


Quote:
I believe the last of the US supported nav differential goes away in 2020.

You are correct if you are referring to the US Coast Guard service. This does not affect land based operations. DGPS does not inherently require any service other than the basic GNSS.
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