Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-27 Thread Adrian Musceac

Update: I've added new signal calculation for DME stations too. As explained 
detailed in the wiki, DME uses a very high frequency range, thus it is 
possible sometimes in reality to receive the VOR signal but not the DME 
signal. Screenshots provided in the wiki article.

Also, TACAN reception is modelled now like the DME, since it uses basically 
the same frequency range. Unlike DME, I have not tested this yet, but should 
also work for AI/multiplayer tankers.
All this disabled by default, of course.

I have not updated the merge request with these features yet, waiting for the 
new radio to make it into 'next' since it's enough code there already.
I have also added a Request for info chapter in the wiki page, asking 
anybody with deep knowledge of air navigation systems to contribute info on 
the discussion page.

Cheers,
Adrian

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Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-27 Thread James Turner

On 27 Nov 2012, at 12:44, Adrian Musceac kanto...@gmail.com wrote:

 I have not updated the merge request with these features yet, waiting for the 
 new radio to make it into 'next' since it's enough code there already.
 I have also added a Request for info chapter in the wiki page, asking 
 anybody with deep knowledge of air navigation systems to contribute info on 
 the discussion page.

Gitorious was down this morning, or I would have already given some review 
comments. However I see quite a few new versions of the patch, it would be good 
to know it's 'ready' from your perspective, before reviewing. I too would 
prefer to merge smaller patches - I didn't yet see how big the current one is, 
since Gitorious is still being silly.

James
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Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-27 Thread Adrian Musceac
On Tuesday, November 27, 2012 14:53:07 James Turner wrote:

 
 Gitorious was down this morning, or I would have already given some review
 comments. However I see quite a few new versions of the patch, it would be
 good to know it's 'ready' from your perspective, before reviewing. I too
 would prefer to merge smaller patches - I didn't yet see how big the
 current one is, since Gitorious is still being silly.
 
 James

Hi James,
Thanks for reviewing the code. Gitorious is back for me now. The code is 
production ready and tested, I've just added some little fixes and 
improvements in the new versions, which don't affect stability on my system.
I think it would be best to review and merge as disabled by default, and then 
allow users to test and find bugs. I can't do that properly alone.

Cheers,
Adrian

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[Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-26 Thread Adrian Musceac

Hi,
I have added VOR, localizer and glideslope signal calculations for the old 
(classic) navradios (navradio.cxx)
Now an ILS navaid is basically considered as two separate stations: Localizer 
and glideslope, as in reality. Both these stations can have separate 
parameters like transmitter power, antenna type etc.
Tested ok on C172p, but I've seen other aircraft that fail to set the GS flag 
when the GS signal is lost and LOC signal still present.
Localizer on backcourse has range about half the normal one, due to the 
antenna patterns.
This still needs testing for realism, especially since I'm not very happy with 
the antenna patterns I'm using, and the transmitter powers may be well off for 
ILS (but are ok for VOR's, according to data I have).
Merge request #1568 has been updated today to reflect the changes.
The antenna pattern used everywhere should go into $FGDATA/Navaids/Antennas/ 
but I'm really not keen on placing a merge request for only one text file, so 
awaiting suggestions.

Cheers,
Adrian

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Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-26 Thread James Turner

On 26 Nov 2012, at 17:11, Adrian Musceac kanto...@gmail.com wrote:

 I have added VOR, localizer and glideslope signal calculations for the old 
 (classic) navradios (navradio.cxx)
 Now an ILS navaid is basically considered as two separate stations: Localizer 
 and glideslope, as in reality. Both these stations can have separate 
 parameters like transmitter power, antenna type etc.
 Tested ok on C172p, but I've seen other aircraft that fail to set the GS flag 
 when the GS signal is lost and LOC signal still present.
 Localizer on backcourse has range about half the normal one, due to the 
 antenna patterns.
 This still needs testing for realism, especially since I'm not very happy 
 with 
 the antenna patterns I'm using, and the transmitter powers may be well off 
 for 
 ILS (but are ok for VOR's, according to data I have).
 Merge request #1568 has been updated today to reflect the changes.
 The antenna pattern used everywhere should go into $FGDATA/Navaids/Antennas/ 
 but I'm really not keen on placing a merge request for only one text file, so 
 awaiting suggestions.

I'll do a review if no-one beats me to it, but this definitely needs to be 
'off-by-default' for the next release. We can add a checkbox to the realism 
dialog to enable it from the GUI, and give aircraft authors a chance to adapt.

Well, that's my opinion at least.

James
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Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-26 Thread Adrian Musceac
On Monday, November 26, 2012 19:18:26 James Turner wrote:

 
 I'll do a review if no-one beats me to it, but this definitely needs to be
 'off-by-default' for the next release. We can add a checkbox to the
 realism dialog to enable it from the GUI, and give aircraft authors a
 chance to adapt.
 
 Well, that's my opinion at least.
 
 James

It's off by default of course. GUI checkbox would be a plus. Right now it's 
using command line properties.
About aircraft authors needing to adapt, I've had a brief look between C172P 
which is ok, and C337 Skymaster which does not display the off flag for 
glideslope when LOC signal still present. It appears to be a case of not 
checking one property set by the glideslope code (old code, not new one).
Aircraft authors basically should not have to worry about whether the new 
system is on or off, and just use the glideslope flag properties like it's 
used in C172p's panel.
Again, this new code does nothing new to the logic of the navradios, except 
realistically computing whether a signal is present or not. 

Cheers,
Adrian

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Re: [Flightgear-devel] Navaids radio propagation code almost production ready

2012-11-26 Thread Adrian Musceac
On Monday, November 26, 2012 19:18:26 James Turner wrote:
 I'll do a review if no-one beats me to it, but this definitely needs to be
 'off-by-default' for the next release. We can add a checkbox to the
 realism dialog to enable it from the GUI, and give aircraft authors a
 chance to adapt.
 
 Well, that's my opinion at least.
 
 James

Emilian pointed out to me that different aircraft can have different types of 
receivers and antennas for ILS equipment. Of course, if it is desirable, we 
can make a guideline regarding aircraft developers setting some properties 
somewhere according to a convention we make. Then we could use these inside 
the navradio code, so a 747-400 has different equipment behaviour than a 
Cessna.

Also, I'd like to remind everyone who is interested in this that glideslope 
signals use a different (higher) range of frequencies than VOR/LOC, thus 
having totally different propagation characteristics, especially in 
hilly/mountainous terrain.

Cheers,
Adrian

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Re: [Flightgear-devel] navaids update

2009-12-21 Thread jean pellotier

Martin Spott a écrit :

Salut Jean,

jean pellotier wrote:

  

Is nav.dat supposed to be updated from robin X-plane database?



If nobody else is going to do that, I'll be updating the file from
Robin's most current package during our pre-release phase (however this
is going to be defined ).

  
I see the update is done, thanks, (and sorry for windows users waiting 
for a compatible binary build :) ).
It appears that Atlas don't like the new nav.dat.gz, and crash on start 
up, because some navaids contains empty field for the balise name (i 
guess it's the balise name).


here's a diff where the missing fields are replaced with IXXX. may be 
the real name is available, but i didn't found the few i checked.


and Atlas don't crash anymore.


jano
12062c12062
 4  47.49051500 -111.20608600   3526 10950  18 238.500  KGFA 21  ILS-cat-I
---
 4  47.49051500 -111.20608600   3526 10950  18 238.500 IXXX KGFA 21  ILS-cat-I
12103c12103
 4  38.85886700 -094.55694100   1090 10930  18  11.886  KGVW 01  ILS-cat-I
---
 4  38.85886700 -094.55694100   1090 10930  18  11.886 IXXX KGVW 01  ILS-cat-I
12393c12393
 4  46.5362 -087.54817000   1419 11050  18  76.841  KMQT 08  ILS-cat-I
---
 4  46.5362 -087.54817000   1419 11050  18  76.841 IXXX KMQT 08  ILS-cat-I
13389c13389
 4  70.33308600 -149.56581800 67 10970  18 107.900  PAKU 05  ILS-cat-I
---
 4  70.33308600 -149.56581800 67 10970  18 107.900 IXXX PAKU 05  ILS-cat-I
14125c14125
 5  45.29766700 -072.73483300375 11070  18  36.999  CZBM 05L LOC
---
 5  45.29766700 -072.73483300375 11070  18  36.999 IXXX CZBM 05L LOC
14255c14255
 5  35.27726300 -089.66926600312 11155  18 153.681  KLHC 15  LOC
---
 5  35.27726300 -089.66926600312 11155  18 153.681 IXXX KLHC 15  LOC
14372c14372
 5  70.25181500 -148.35802800 45 10970  18 106.500  PUO  05  SDF
---
 5  70.25181500 -148.35802800 45 10970  18 106.500 IXXX PUO  05  SDF
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Re: [Flightgear-devel] navaids update

2009-12-21 Thread Brian Schack
 Jean == jean pellotier  writes:

Jean I see the update is done, thanks, (and sorry for windows users
Jean waiting for a compatible binary build :) ).  It appears that
Jean Atlas don't like the new nav.dat.gz, and crash on start up,
Jean because some navaids contains empty field for the balise name
Jean (i guess it's the balise name).

Jean here's a diff where the missing fields are replaced with
Jean IXXX. may be the real name is available, but i didn't found
Jean the few i checked.

Jean and Atlas don't crash anymore.

Thanks for the fix.  Although it doesn't really matter, Robin is in the
habit of indicating no ID with ''.  I've written to him about the
navaids in question, since having a blank ID field seems to violate his
file format specification.

Brian

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Re: [Flightgear-devel] navaids update

2009-12-20 Thread Martin Spott
John Denker wrote:

 On the opposite side of the same coin, the last time 
 I looked, the scenery database listed huge numbers of 
 airports that were unknown to Robin's database.

I don't know which scenery database you've been looking at, but it's
certainly not been the one which we're using for building the
FlightGear World Scenery from, aka. Landcover-DB, the one behind
http://[mapserver,scenemodels].flightgear.org/
With probably _very_ few exceptions (one or two), the airport info of
'our' database has been populated from Robin's exports only,

Martin.
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Re: [Flightgear-devel] navaids update

2009-12-19 Thread John Denker
On 12/19/2009 07:40 AM, Martin Spott wrote:

 ... Robin's current set of navaids ...
 contains navaids for airfields which are otherwise unknown to
 FlightGear,

On the opposite side of the same coin, the last time 
I looked, the scenery database listed huge numbers of 
airports that were unknown to Robin's database.  This 
has never been a problem AFAIK.


 Copying the files from Robin's current set of navaids leads to a fault
 since it contains navaids for airfields which are otherwise unknown to
 FlightGear,

From the keen-grasp-of-the-obvious department:

Maybe the code should be made more robust so that this 
is not a fault condition.

This is not the first time in history that code has
needed to perform a join on two databases that are
not in one-to-one correspondence.


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Re: [Flightgear-devel] navaids update

2009-12-19 Thread James Turner

On 19 Dec 2009, at 16:19, John Denker wrote:

 Maybe the code should be made more robust so that this 
 is not a fault condition.
 
 This is not the first time in history that code has
 needed to perform a join on two databases that are
 not in one-to-one correspondence.

Well I wrote the code in question, and preferred to reject a corrupt data set 
rather than blindly carrying on - I am also a bit reluctant to encourage casual 
users to mess with a somewhat archaic data format.

Nevertheless, it's pretty easy to tolerate this case, a fix will appear soon - 
the problem is some things aren't going to work, notably ILS - runway 
references.

James

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[Flightgear-devel] navaids update

2009-12-14 Thread jean pellotier

Hi,

I've got a question about the navaids, particularly nav.dat.

Is nav.dat supposed to be updated from robin X-plane database?

The french missing navaids I submited to robin ( approach locators ) are 
included in recent nav.dat from X-plane, and I was waiting them to come 
in Flightgear, but apparently we are using the version just before.



here's a diff toward our current nav.dat with the missing french 
locators, if you find some interest in using french airports :) .


jano
--- fg_nav.dat	2009-12-14 11:22:24.0 +0100
+++ jjano_nav.dat	2009-12-14 11:22:02.0 +0100
@@ -1,6 +1,104 @@
 I
 810 Version - DAFIF data cycle 2007.09, build 20070106, metadata NavXP810.  Copyright © 2007, Robin A. Peel (ro...@xsquawkbox.net).   This data is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.  You should have received a copy of the GNU General Public License along with this program (AptNavGNULicence.txt); if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.  This product was developed using DAFIF (the Defense Aeronautical Flight Information File), a product of the US National Imagery and Mapping Agency (NIMA). NIMA requires the following warranty statements:  (A) Under 10 U.S.C. 456, no civil action may be brought against the United States on the basis of the content of a navigational aid prepared or disseminated by either the former Defense Mapping Agency (DMA) or the National Imagery and Mapping Agency (NIMA).  (B) The DAFIF product is provided as is, and no warranty, express or implied, including, but not limited to the implied warranties of merchantability and fitness for particular purpose or arising by statute or otherwise in law or from a course of dealing or usage in trade, is made by NIMA as to the accuracy and functioning of the product. ©: Neither NIMA nor its personnel will be liable for any claims, losses, or damages arising from or connected with the use of this product.  The user agrees to hold harmless the United States National Imagery and Mapping Agency.  The user's sole and exclusive remedy is to stop using the DAFIF product.
 
+2  43.9122  002.0644528   323  250.0 AB   Albi le Sequestre NDB
+2  49.9762  002.80941666361   321 1500.0 ABY  Albert Bray NDB
+2  43.26527778  005.58638000590   366  250.0 ADC  Le Castellet NDB
+2  44.1505  000.6738156   400  250.0 AG   Agen la Garenne NDB
+2  45.7105  000.4269397   404  250.0 AGO  Angouleme Brie Champniers NDB
+2  44.9558  002.3680   2310   343  250.0 AR   Aurillac NDB
+2  47.5772 -000.1513305   292  250.0 AS   Angers Marce NDB
+2  45.8616  006.0205   2205   384  250.0 AT   Annecy Meythet NDB
+2  44.4422  004.3619676   427  250.0 AUB  Aubenas Ardeche Meridionale NDB
+2  46.88167000  002.92888955679   306  250.0 AV   Avord NDB
+2  47.9202  003.5022505   417  250.0 AX   Auxerre Branches NDB
+2  47.6108  002.7827528   405  250.0 BIC  Briare Chatillon NDB
+2  45.52027800  004.29889000   1371   299  250.0 BO   Saint Etienne Boutheon NDB
+2  46.2038  005.2888869   423  250.0 BOR  Bourg Ceyzeriat NDB
+2  42.4258  009.5375 33   369  250.0 BP   Bastia Poretta NDB
+2  45.6158  004.99278000   1076   388  250.0 BR   Lyons Bron NDB
+2  47.0175  002.2816509   375  250.0 BRG  Bourges NDB
+2  44.3652 -001.1288 92   358  250.0 BRS  Biscarrosse Parentis NDB
+2  47.2669  006.2025   1348   370  250.0 BSV  Besancon la Veze
+2  49.4916  002.0294377   391  250.0 BV   Beauvais Tille NDB
+2  44.5669  003.4691   4062   393  250.0 BX   Mende Brenoux NDB
+2  46.7216  004.8430656   391  250.0 CC   Chalon Champforgeuil NDB
+2  45.8044  003.3616   1066   367  250.0 CF   Clermond Ferrand Auvergne NDB
+2  49.0052  002.7402352   370  250.0 CGZ  Paris Charles de Gaulle NDB
+2  45.5925  005.88361100840   346  250.0 CH   Chambery Aix les Bains NDB
+2  48.0077  003.6961545   353  250.0 CHY  Chailley NDB
+2  44.38527778  001.4155951   348  250.0 CL   Cahors Lalbenque NDB
+2  43.2225  002.2077489   345  250.0 CS   Carcassonne Salvaza NDB
+2  43.5228  007.04527778 98   385  250.0 CSC  Cannes Mandelieu NDB
+2  41.7952  008.7241295   387  250.0 CT   Ajaccio Campo dell'Oro NDB
+2  48.7591  004.3188604   347  

Re: [Flightgear-devel] navaids update

2009-12-14 Thread Martin Spott
Salut Jean,

jean pellotier wrote:

 Is nav.dat supposed to be updated from robin X-plane database?

If nobody else is going to do that, I'll be updating the file from
Robin's most current package during our pre-release phase (however this
is going to be defined ).

 here's a diff toward our current nav.dat with the missing french 
 locators, if you find some interest in using french airports :) .

I do - been flying there several times in real life and mostly had to
do visual navigation because no navaids (neither VOR's nor anything
else) had been installed on my routes  :-)

Cheers,
Martin.
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Re: [Flightgear-devel] navaids update

2009-12-14 Thread Pete Morgan
Is nav.dat supposed to be updated from robin X-plane database?


 If nobody else is going to do that, I'll be updating the file from
 Robin's most current package during our pre-release phase (however this
 is going to be defined ).

   
Can't the data be commited to CVS now ?

pete


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Re: [Flightgear-devel] Navaids FIX data with duplicates entries

2008-02-07 Thread Cleber Santz
   Yes, SBGL is in APT.DAT but the FIX around is not in FIX.DAT ( Like FICO, 
PERES )

   And there duplicates entries in X-Plane data too, i have send mail for Robin 
check it, but FIX of around SBGL airport is in X-Plane but not in Flightgear.

Tks,
Cleber

K. Hoercher [EMAIL PROTECTED] escreveu: On Thu, Feb 07, 2008 at 03:42:05PM 
+0100, Pietro wrote:
 At Thursday 07 February 2008 15:28:55 Cleber Santz wrote:
 One more thing, some FIX that find in X-Plane navaid data not appers in
  FlightGear ( FIX for SBGL airport for example ), is not the same database ?

Well I checked LEPAS and HARDLY quickly in another source, and there are
several of them too. Although the real world authorities strive for
uniqueness, they cannot and do not guarantee so. Short of errors or
oversights on the part of Robin Peel, his (thus X-Plane's and in turn
our) navaids data does reflect this accurately.

Also SBGL Galeão Antonio Carlos Jombim is to be found in apt.dat.gz
and looks alright to me.

 
 Hi,
 
 AFAIK the fgfs navaids files have been converted from X-plane data files,
 but alas, years ago and therefore they are outdated.
 
 Pietro
 

The last update was somehow shortly before the relase of 1.0.0, and
taking into account the mentioned possible errors/delays it should be 
up-to-date within reasonable limits, although not following the very
latest AIRAC cycle.

regards
K. Hoercher

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Re: [Flightgear-devel] Navaids FIX data with duplicates entries

2008-02-07 Thread John Denker
On 02/07/2008 07:28 AM, Cleber Santz wrote:

 I have trace same routes using waypoints and find many duplicates
 entries in FIX Data ( like LEPAS, HARDY ) with different coordinates,
 thats is correct ?

1) That is a correct observation, there are duplicate fixes.  That
 includes named waypoints, VORs, et cetera.

2) This is *not* a bug in the database.  Complaining to Robin about 
 it would be a step in the wrong direction.

3) Real-world pilots and real-world navigation instruments resolve
 the ambiguity by choosing the _nearest_ one of the possibilities.

4) This *is* a bug in the stock version of the FGFS code, in the
 sense that it is not smart about duplicate fixes.

5) This bug was fixed eons ago in the Sport Model.  See item 31 on
 the list at
 http://www.av8n.com/fly/fgfs/README.sport.model



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Re: [Flightgear-devel] Navaids FIX data with duplicates entries

2008-02-07 Thread K. Hoercher
On Thu, Feb 07, 2008 at 03:42:05PM +0100, Pietro wrote:
 At Thursday 07 February 2008 15:28:55 Cleber Santz wrote:
 One more thing, some FIX that find in X-Plane navaid data not appers in
  FlightGear ( FIX for SBGL airport for example ), is not the same database ?

Well I checked LEPAS and HARDLY quickly in another source, and there are
several of them too. Although the real world authorities strive for
uniqueness, they cannot and do not guarantee so. Short of errors or
oversights on the part of Robin Peel, his (thus X-Plane's and in turn
our) navaids data does reflect this accurately.

Also SBGL Galeão Antonio Carlos Jombim is to be found in apt.dat.gz
and looks alright to me.

 
 Hi,
 
 AFAIK the fgfs navaids files have been converted from X-plane data files,
 but alas, years ago and therefore they are outdated.
 
 Pietro
 

The last update was somehow shortly before the relase of 1.0.0, and
taking into account the mentioned possible errors/delays it should be 
up-to-date within reasonable limits, although not following the very
latest AIRAC cycle.

regards
K. Hoercher

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[Flightgear-devel] Navaids FIX data with duplicates entries

2008-02-07 Thread Cleber Santz
Hi,
 
   I have trace same routes using waypoints and find many duplicates entries in 
FIX Data ( like LEPAS, HARDY ) with different coordinates, thats is correct ?

   One more thing, some FIX that find in X-Plane navaid data not appers in 
FlightGear ( FIX for SBGL airport for example ), is not the same database ?

Tks,
Cleber Santz.

  




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Re: [Flightgear-devel] Navaids FIX data with duplicates entries

2008-02-07 Thread Pietro
At Thursday 07 February 2008 15:28:55 Cleber Santz wrote:
One more thing, some FIX that find in X-Plane navaid data not appers in
 FlightGear ( FIX for SBGL airport for example ), is not the same database ?

Hi,

AFAIK the fgfs navaids files have been converted from X-plane data files,
but alas, years ago and therefore they are outdated.

Pietro


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Re: [Flightgear-devel] NAVAIDS ???

2006-01-29 Thread Jon Stockill

Mathias Fröhlich wrote:

Jon,

On Tuesday 24 January 2006 22:45, Jon Stockill wrote:


I've just discovered that when using the null fdm I'm not getting
updates to /position/ground-elev-m any more. So I can't actually
retrieve the terrain elevation. Is there somewhere else in the property
tree I could read this from?


The attached patch should fix your problem.


Yup - that's great - the values are updating now.

Jon


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Re: [Flightgear-devel] NAVAIDS ???

2006-01-24 Thread Jon Stockill

Jon Stockill wrote:

So with any luck I should have a full update of all the navaids in the 
database with correct elevations by this weekend.


It seems I don't have any luck at the moment.

I've just discovered that when using the null fdm I'm not getting 
updates to /position/ground-elev-m any more. So I can't actually 
retrieve the terrain elevation. Is there somewhere else in the property 
tree I could read this from?


Jon


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Re: [Flightgear-devel] NAVAIDS ???

2006-01-24 Thread Curtis L. Olson

Jon Stockill wrote:


Jon Stockill wrote:

So with any luck I should have a full update of all the navaids in 
the database with correct elevations by this weekend.



It seems I don't have any luck at the moment.

I've just discovered that when using the null fdm I'm not getting 
updates to /position/ground-elev-m any more. So I can't actually 
retrieve the terrain elevation. Is there somewhere else in the 
property tree I could read this from?



Hmmm, ouch, ground_cache issues?  This was added by others so I don't 
understand it enough to know if this could be the issue or not.  Might 
be something to look at though ...


Curt.

--
Curtis Olsonhttp://www.flightgear.org/~curt
HumanFIRST Program  http://www.humanfirst.umn.edu/
FlightGear Project  http://www.flightgear.org
Unique text:2f585eeea02e2c79d7b1d8c4963bae2d



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Re: [Flightgear-devel] NAVAIDS ???

2006-01-24 Thread Mathias Fröhlich
On Tuesday 24 January 2006 22:45, Jon Stockill wrote:
 Jon Stockill wrote:
  So with any luck I should have a full update of all the navaids in the
  database with correct elevations by this weekend.

 It seems I don't have any luck at the moment.

 I've just discovered that when using the null fdm I'm not getting
 updates to /position/ground-elev-m any more. So I can't actually
 retrieve the terrain elevation. Is there somewhere else in the property
 tree I could read this from?
Jon, I have added that to the todo list.
:)
But not until tomorrow ...

Greetings

Mathias

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