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Too many GPS puck antennas



 
 
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  #21  
Old January 12th 20, 11:35 AM posted to rec.aviation.soaring
Darryl Ramm
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Posts: 2,365
Default Too many GPS puck antennas

On Sunday, January 12, 2020 at 1:31:26 AM UTC-8, Richard Frawley wrote:
You can feed the S100 with flarm data which has GPS data


This came up elsewhere, and other folks suggested you could not switch the S100 off the internal GPS for basic navigation data.

Do you know for sure the S100 can use that FLARM GPS data for navigation? If so is there any way to select which GPS source is used? The manual seems to not mention this or clarify the GPS source being used. If the connection of a FLARM always have to use the external FLARM GPS that might raise concerns you are not navigating from the exact GPS that is driving the S100 flight recorder (so you are not necessarily seeing exactly the same data... or maybe not noticing any problems). This is a S100 specific question, clearly the S80 etc. use the external GPS data for navigation.

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  #22  
Old January 12th 20, 04:45 PM posted to rec.aviation.soaring
Charles Longley
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Default Too many GPS puck antennas

I’ll give it at try this week and report back. Some of my experienced friends don’t think it’ll work with an S100.
  #24  
Old January 12th 20, 05:27 PM posted to rec.aviation.soaring
Dan Marotta
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Default Too many GPS puck antennas

....or just look at the section lines on then ground.* If the sun is
shining, it's pretty easy to guess the cardinal directions.

On 1/11/2020 8:58 PM, Eric Greenwell wrote:
Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there are
mountains to guide you. In Kansas, look at the GPS track when you want
to know direction. Or pull out your iPhone, and use the compass app.


--
Dan, 5J
  #25  
Old January 12th 20, 08:48 PM posted to rec.aviation.soaring
2G
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Posts: 799
Default Too many GPS puck antennas

On Sunday, January 12, 2020 at 8:27:19 AM UTC-8, Dan Marotta wrote:
...or just look at the section lines on then ground.* If the sun is
shining, it's pretty easy to guess the cardinal directions.

On 1/11/2020 8:58 PM, Eric Greenwell wrote:
Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there are
mountains to guide you. In Kansas, look at the GPS track when you want
to know direction. Or pull out your iPhone, and use the compass app.


--
Dan, 5J


Garmin's only precaution about the placement of multiple GPS antennas is the potential effect of one antenna shadowing another:

3c. To minimize the effects of shadowing at 5° elevation angles, the GPS antenna should be mounted no
closer than 6 inches (edge to edge) from other antennas, including passive antennas such as another
GPS antenna or XM antenna.

http://static.garmin.com/pumac/GA35G...structions.pdf

And if you want to share a single antenna with multiple instruments you can get a splitter (albeit not cheaply!):

https://www.gpssource.com/collections/gps-splitter

Tom
  #26  
Old January 12th 20, 08:50 PM posted to rec.aviation.soaring
2G
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Posts: 799
Default Too many GPS puck antennas

On Sunday, January 12, 2020 at 11:48:42 AM UTC-8, 2G wrote:
On Sunday, January 12, 2020 at 8:27:19 AM UTC-8, Dan Marotta wrote:
...or just look at the section lines on then ground.* If the sun is
shining, it's pretty easy to guess the cardinal directions.

On 1/11/2020 8:58 PM, Eric Greenwell wrote:
Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there are
mountains to guide you. In Kansas, look at the GPS track when you want
to know direction. Or pull out your iPhone, and use the compass app.


--
Dan, 5J


Garmin's only precaution about the placement of multiple GPS antennas is the potential effect of one antenna shadowing another:

3c. To minimize the effects of shadowing at 5° elevation angles, the GPS antenna should be mounted no
closer than 6 inches (edge to edge) from other antennas, including passive antennas such as another
GPS antenna or XM antenna.

http://static.garmin.com/pumac/GA35G...structions.pdf

And if you want to share a single antenna with multiple instruments you can get a splitter (albeit not cheaply!):

https://www.gpssource.com/collections/gps-splitter

Tom


Here is a cheaper splitter:

https://timemachinescorp.com/product...hoC4g8QAvD_BwE

Tom
  #27  
Old January 13th 20, 05:26 AM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,321
Default Too many GPS puck antennas

Dan Marotta wrote on 1/12/2020 8:27 AM:
....or just look at the section lines on then ground.* If the sun is shining, it's
pretty easy to guess the cardinal directions.

On 1/11/2020 8:58 PM, Eric Greenwell wrote:
Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there are mountains
to guide you. In Kansas, look at the GPS track when you want to know direction.
Or pull out your iPhone, and use the compass app.


If the sun is shining around noon or even somewhat later, it's mostly overhead.
It's really easy to pop out of a thermal and head off at 90 degrees to course.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

  #28  
Old January 13th 20, 06:19 AM posted to rec.aviation.soaring
Thomas Van de Velde
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Posts: 18
Default Too many GPS puck antennas

The S100 accepts GPS data for FLARM positioning but not for navigation or logging. You have to connect a direct antenna. I have two pucks next to each other and have never had issues.
  #29  
Old January 13th 20, 06:09 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 3,868
Default Too many GPS puck antennas

Ya got me there, Eric!* It's been decades since I've not seen mountains.

On 1/12/2020 9:26 PM, Eric Greenwell wrote:
Dan Marotta wrote on 1/12/2020 8:27 AM:
....or just look at the section lines on then ground.* If the sun is
shining, it's pretty easy to guess the cardinal directions.

On 1/11/2020 8:58 PM, Eric Greenwell wrote:
Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there
are mountains to guide you. In Kansas, look at the GPS track when
you want to know direction. Or pull out your iPhone, and use the
compass app.


If the sun is shining around noon or even somewhat later, it's mostly
overhead. It's really easy to pop out of a thermal and head off at 90
degrees to course.


--
Dan, 5J
 




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