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| Science Forum Index » Geology - Satellite Navigation Forum » Webinar: What’s Up With SV49? Tuesday, No vember 17,... |
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| Sam Wormley... |
 Posted: Thu Nov 05, 2009 4:26 pm |
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| Sam Wormley... |
| Posted: Thu Nov 05, 2009 4:27 pm |
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Guest
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Sam Wormley wrote:
[quote]Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
[/quote]
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions. |
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| Nicholas... |
| Posted: Thu Nov 05, 2009 7:15 pm |
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Guest
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On Thu, 05 Nov 2009 21:27:28 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com>
wrote:
[quote]Sam Wormley wrote:
Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions.
[/quote]
I already know why SVN49 went tits up. It was MADE IN CHINA! Or at
least, PARTS were made in China. Watch the US Command try to weasel
out of this one. Should be entertaining.
Lg |
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| Sam Wormley... |
| Posted: Thu Nov 05, 2009 7:19 pm |
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Guest
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Nicholas wrote:
[quote]On Thu, 05 Nov 2009 21:27:28 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Sam Wormley wrote:
Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions.
I already know why SVN49 went tits up. It was MADE IN CHINA! Or at
least, PARTS were made in China. Watch the US Command try to weasel
out of this one. Should be entertaining.
Lg
[/quote]
Actually you are wrong, Larry. I take it you have not been
following the plight of SVN49 for the better part of a year
now. |
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| Nicholas... |
| Posted: Thu Nov 05, 2009 7:23 pm |
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Guest
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On Fri, 06 Nov 2009 00:19:02 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com>
wrote:
[quote]Nicholas wrote:
On Thu, 05 Nov 2009 21:27:28 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Sam Wormley wrote:
Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions.
I already know why SVN49 went tits up. It was MADE IN CHINA! Or at
least, PARTS were made in China. Watch the US Command try to weasel
out of this one. Should be entertaining.
Lg
Actually you are wrong, Larry. I take it you have not been
following the plight of SVN49 for the better part of a year
now.
Can you find ANY electronics product that has NO Chinese parts in it.[/quote]
You're right about my not following 49 around, as I have other
pressing matters, but really, I'll bet some cheap-assed microchip that
hit the factory floor was swept up and soldered into a subassembly.
It wouldn't be the first time, and it won't be the last.
Lg |
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| Sam Wormley... |
| Posted: Thu Nov 05, 2009 7:34 pm |
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Guest
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Nicholas wrote:
[quote]On Fri, 06 Nov 2009 00:19:02 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Nicholas wrote:
On Thu, 05 Nov 2009 21:27:28 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Sam Wormley wrote:
Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions.
I already know why SVN49 went tits up. It was MADE IN CHINA! Or at
least, PARTS were made in China. Watch the US Command try to weasel
out of this one. Should be entertaining.
Lg
Actually you are wrong, Larry. I take it you have not been
following the plight of SVN49 for the better part of a year
now.
Can you find ANY electronics product that has NO Chinese parts in it.
You're right about my not following 49 around, as I have other
pressing matters, but really, I'll bet some cheap-assed microchip that
hit the factory floor was swept up and soldered into a subassembly.
It wouldn't be the first time, and it won't be the last.
Lg
[/quote]
You should read the past SVN49 Posts and the link there within. |
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| Nicholas... |
| Posted: Thu Nov 05, 2009 7:44 pm |
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Guest
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On Fri, 06 Nov 2009 00:34:56 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com>
wrote:
[quote]Nicholas wrote:
On Fri, 06 Nov 2009 00:19:02 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Nicholas wrote:
On Thu, 05 Nov 2009 21:27:28 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
wrote:
Sam Wormley wrote:
Webinar: What’s Up With SV49? Tuesday, November 17, 2009
Date: Tuesday, November 17, 2009
Time: 10:00 a.m. Pacific / 1:00 p.m. Eastern
Duration: 60 minutes
https://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=175858&sessionid=1&key=9B149932241DB20F2A2A24F5C141F022&sourcepage=register
The U.S. Air Force has indicated it is "not a question of if, but when" it will set SVN49
healthy. A number of possible ways to do this, either further modifying the
multipath-containing signal or not, have been advanced. Spirent has been working to create
GPS simulator scenarios regarding the anomalous SV49 signal with a view to making them
publicly availably once they have been validated by the GPS Wing. Peter Boulton from
Spirent Communications will provide an update on these efforts, with support from Spirent
Federal. Greg Turetzky of SiRF Technology will give his company’s view, shared by some but
not all GPS manufacturers: if SVN49 is set healthy, its signal should also contain an
appropriate indicator that it is different from other satellites. Followed by your questions.
I already know why SVN49 went tits up. It was MADE IN CHINA! Or at
least, PARTS were made in China. Watch the US Command try to weasel
out of this one. Should be entertaining.
Lg
Actually you are wrong, Larry. I take it you have not been
following the plight of SVN49 for the better part of a year
now.
Can you find ANY electronics product that has NO Chinese parts in it.
You're right about my not following 49 around, as I have other
pressing matters, but really, I'll bet some cheap-assed microchip that
hit the factory floor was swept up and soldered into a subassembly.
It wouldn't be the first time, and it won't be the last.
Lg
You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30[/quote]
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg |
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| Sam Wormley... |
| Posted: Thu Nov 05, 2009 8:26 pm |
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Guest
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Nicholas wrote:
[quote]On Fri, 06 Nov 2009 00:34:56 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
[/quote]
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite. |
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| Nicholas... |
| Posted: Thu Nov 05, 2009 8:51 pm |
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Guest
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On Fri, 06 Nov 2009 01:26:50 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com>
wrote:
[quote]Nicholas wrote:
On Fri, 06 Nov 2009 00:34:56 GMT, Sam Wormley <swormley1 at (no spam) mchsi.com
You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite.
[/quote]
Okay. I used to call that a *patch* (not to be confused with a patch
antenna). I've been driven to insanity over the decades of dealing
with these types of things. My German Employer was famous for coming
out with *add-ons* with instructions either missing, or only in
German. Fortunately, I'm a good schematic translator and managed the
modifications despite the unforeseen equipment and missing
installation literature  Operation instructions might be 1 sheet of
paper or 20. Didn't matter as it was all not decipherable anyhow.
For sure, I couldn't go home until problem corrected. Once we flew in
a design engineer from Germany and even he was stymied for about a
week until he figured out that intermittent cross-talk in a single
ribbon cable was causing machine shut downs. Wow, if they had moved
that signal line 2 places to the right on the pinouts, this trouble
never would have happened.
What I am getting at is: some things can't be anticipated and there is
always the possibility of trouble because of that fact. And
components age, values drift, operational amplifiers go out of
adjustment, things need to be tweaked all the time on _ground_
equipment.
Once you put something into ORBIT, tweaking at the hardware level is
problematic, Hubble notwithstanding. Remember the rigmarole that the
Shuttle Crew had to go through to replace a ceramic tile? On the
ground that would have taken 15 minutes. In SPACE, an Epoch.
Now that SV49 is out there where nobody can put their hands on it,
good luck to the Space Command getting it to work correctly. If it is
a hardware problem, that can't be compensated for with a software
solution, I can say, FAIL.
Lg |
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| GPSGUY... |
| Posted: Thu Nov 05, 2009 9:51 pm |
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Guest
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It's not a component problem, it's a design problem.
The problem is not that you "questioned authority", you just didn't do
your homework before doing so.
[quote] You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite.
Okay. I used to call that a *patch* (not to be confused with a patch
antenna). I've been driven to insanity over the decades of dealing
with these types of things. My German Employer was famous for coming
out with *add-ons* with instructions either missing, or only in
German. Fortunately, I'm a good schematic translator and managed the
modifications despite the unforeseen equipment and missing
installation literature Operation instructions might be 1 sheet of
paper or 20. Didn't matter as it was all not decipherable anyhow.
For sure, I couldn't go home until problem corrected. Once we flew in
a design engineer from Germany and even he was stymied for about a
week until he figured out that intermittent cross-talk in a single
ribbon cable was causing machine shut downs. Wow, if they had moved
that signal line 2 places to the right on the pinouts, this trouble
never would have happened.
What I am getting at is: some things can't be anticipated and there is
always the possibility of trouble because of that fact. And
components age, values drift, operational amplifiers go out of
adjustment, things need to be tweaked all the time on _ground_
equipment.
Once you put something into ORBIT, tweaking at the hardware level is
problematic, Hubble notwithstanding. Remember the rigmarole that the
Shuttle Crew had to go through to replace a ceramic tile? On the
ground that would have taken 15 minutes. In SPACE, an Epoch.
Now that SV49 is out there where nobody can put their hands on it,
good luck to the Space Command getting it to work correctly. If it is
a hardware problem, that can't be compensated for with a software
solution, I can say, FAIL.
Lg[/quote] |
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| HIPAR... |
| Posted: Fri Nov 06, 2009 3:06 am |
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Guest
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On Nov 6, 6:56 am, Nicholas <Lawrence_Glick... at (no spam) comcast.net> wrote:
[quote]On Thu, 5 Nov 2009 23:51:54 -0800 (PST), GPSGUY <sat_ali... at (no spam) yahoo.com
wrote:
It's not a component problem, it's a design problem.
The problem is not that you "questioned authority", you just didn't do
your homework before doing so.
======================================================> I have been an irregular reader of this n/g for a long time, and have
missed many topics. I am not as heavily invested in it as many others
are.
Besides that, many posts are clearly over my head in terms of the
technology. But when you put it this way: "it's a design problem," I
can get behind that and relate.
No, I didn't do my homework. That's why you seldom see my posts to
this n/g as the subject matter is _deep_ and requires lots of brain
energy. It can be taxing if one is not steeped in the enigma at an
earlier age.
Lg
You should read the past SVN49 Posts and the link there within..
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite.
Okay. I used to call that a *patch* (not to be confused with a patch
antenna). I've been driven to insanity over the decades of dealing
with these types of things. My German Employer was famous for coming
out with *add-ons* with instructions either missing, or only in
German. Fortunately, I'm a good schematic translator and managed the
modifications despite the unforeseen equipment and missing
installation literature Operation instructions might be 1 sheet of
paper or 20. Didn't matter as it was all not decipherable anyhow.
For sure, I couldn't go home until problem corrected. Once we flew in
a design engineer from Germany and even he was stymied for about a
week until he figured out that intermittent cross-talk in a single
ribbon cable was causing machine shut downs. Wow, if they had moved
that signal line 2 places to the right on the pinouts, this trouble
never would have happened.
What I am getting at is: some things can't be anticipated and there is
always the possibility of trouble because of that fact. And
components age, values drift, operational amplifiers go out of
adjustment, things need to be tweaked all the time on _ground_
equipment.
Once you put something into ORBIT, tweaking at the hardware level is
problematic, Hubble notwithstanding. Remember the rigmarole that the
Shuttle Crew had to go through to replace a ceramic tile? On the
ground that would have taken 15 minutes. In SPACE, an Epoch.
Now that SV49 is out there where nobody can put their hands on it,
good luck to the Space Command getting it to work correctly. If it is
a hardware problem, that can't be compensated for with a software
solution, I can say, FAIL.
Lg
[/quote]
Be mindful that many GPS satellites are still operating long past any
their theoretical predicted on orbit life. Some were launched in the
mid/early 90s. That performance will not be achieved with
substandard components, poor quality control or incompetent
engineering.
--- CHAS |
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| Nicholas... |
| Posted: Fri Nov 06, 2009 6:56 am |
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Guest
|
On Thu, 5 Nov 2009 23:51:54 -0800 (PST), GPSGUY <sat_alight at (no spam) yahoo.com>
wrote:
[quote]It's not a component problem, it's a design problem.
The problem is not that you "questioned authority", you just didn't do
your homework before doing so.
[/quote]
=======================================================
I have been an irregular reader of this n/g for a long time, and have
missed many topics. I am not as heavily invested in it as many others
are.
Besides that, many posts are clearly over my head in terms of the
technology. But when you put it this way: "it's a design problem," I
can get behind that and relate.
No, I didn't do my homework. That's why you seldom see my posts to
this n/g as the subject matter is _deep_ and requires lots of brain
energy. It can be taxing if one is not steeped in the enigma at an
earlier age.
Lg
[quote] You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite.
Okay. I used to call that a *patch* (not to be confused with a patch
antenna). I've been driven to insanity over the decades of dealing
with these types of things. My German Employer was famous for coming
out with *add-ons* with instructions either missing, or only in
German. Fortunately, I'm a good schematic translator and managed the
modifications despite the unforeseen equipment and missing
installation literature Operation instructions might be 1 sheet of
paper or 20. Didn't matter as it was all not decipherable anyhow.
For sure, I couldn't go home until problem corrected. Once we flew in
a design engineer from Germany and even he was stymied for about a
week until he figured out that intermittent cross-talk in a single
ribbon cable was causing machine shut downs. Wow, if they had moved
that signal line 2 places to the right on the pinouts, this trouble
never would have happened.
What I am getting at is: some things can't be anticipated and there is
always the possibility of trouble because of that fact. And
components age, values drift, operational amplifiers go out of
adjustment, things need to be tweaked all the time on _ground_
equipment.
Once you put something into ORBIT, tweaking at the hardware level is
problematic, Hubble notwithstanding. Remember the rigmarole that the
Shuttle Crew had to go through to replace a ceramic tile? On the
ground that would have taken 15 minutes. In SPACE, an Epoch.
Now that SV49 is out there where nobody can put their hands on it,
good luck to the Space Command getting it to work correctly. If it is
a hardware problem, that can't be compensated for with a software
solution, I can say, FAIL.
Lg[/quote] |
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| Nicholas... |
| Posted: Fri Nov 06, 2009 8:11 am |
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Guest
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On Fri, 6 Nov 2009 05:06:19 -0800 (PST), HIPAR <captchas at (no spam) verizon.net>
wrote:
[quote]On Nov 6, 6:56 am, Nicholas <Lawrence_Glick... at (no spam) comcast.net> wrote:
On Thu, 5 Nov 2009 23:51:54 -0800 (PST), GPSGUY <sat_ali... at (no spam) yahoo.com
wrote:
It's not a component problem, it's a design problem.
The problem is not that you "questioned authority", you just didn't do
your homework before doing so.
=======================================================
I have been an irregular reader of this n/g for a long time, and have
missed many topics. I am not as heavily invested in it as many others
are.
Besides that, many posts are clearly over my head in terms of the
technology. But when you put it this way: "it's a design problem," I
can get behind that and relate.
No, I didn't do my homework. That's why you seldom see my posts to
this n/g as the subject matter is _deep_ and requires lots of brain
energy. It can be taxing if one is not steeped in the enigma at an
earlier age.
Lg
You should read the past SVN49 Posts and the link there within.
Okay Professor. I'll do that. But recall I've been a HAM for 30
years, an Engineering Technician for 12, and Electronics technician
for all my life before that...and I've seen it =ALL=. German machines
"best in the world" in engineering (my a$$) I worked directly for them
for 10.25 years. Japanese machines "best in the world in electronics"
(my a$$) I worked in SMT (surface mount technology) with them until
retirement.
I've seen 1 (ONE) faulty resistor, take down a $300,000 US machine
until I found it in the rats nest 2 days later. It wasn't open, it
wasn't shorted, it was Out of Tolerance.
I'll read the Tome as punishment and atonement for questioning
authority, but I bet in the end, I bet a gps receiver, that I'm
correct, article unseen.
Lg
No authority--just information on how adding L5 Signal (at the
last minute) screwed up the satellite.
Okay. I used to call that a *patch* (not to be confused with a patch
antenna). I've been driven to insanity over the decades of dealing
with these types of things. My German Employer was famous for coming
out with *add-ons* with instructions either missing, or only in
German. Fortunately, I'm a good schematic translator and managed the
modifications despite the unforeseen equipment and missing
installation literature Operation instructions might be 1 sheet of
paper or 20. Didn't matter as it was all not decipherable anyhow.
For sure, I couldn't go home until problem corrected. Once we flew in
a design engineer from Germany and even he was stymied for about a
week until he figured out that intermittent cross-talk in a single
ribbon cable was causing machine shut downs. Wow, if they had moved
that signal line 2 places to the right on the pinouts, this trouble
never would have happened.
What I am getting at is: some things can't be anticipated and there is
always the possibility of trouble because of that fact. And
components age, values drift, operational amplifiers go out of
adjustment, things need to be tweaked all the time on _ground_
equipment.
Once you put something into ORBIT, tweaking at the hardware level is
problematic, Hubble notwithstanding. Remember the rigmarole that the
Shuttle Crew had to go through to replace a ceramic tile? On the
ground that would have taken 15 minutes. In SPACE, an Epoch.
Now that SV49 is out there where nobody can put their hands on it,
good luck to the Space Command getting it to work correctly. If it is
a hardware problem, that can't be compensated for with a software
solution, I can say, FAIL.
Lg
Be mindful that many GPS satellites are still operating long past any
their theoretical predicted on orbit life. Some were launched in the
mid/early 90s. That performance will not be achieved with
substandard components, poor quality control or incompetent
engineering.
--- CHAS
[/quote]
I hate to remind you of the Morton Thiokol O-ring failure that led to
the deaths of a lot of good Man (and women).
When its time for the balloon to go up, there isn't much anybody is
going to be able to do about it except reap the seeds of wrath.
Lg |
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