Comments for Steve's Ubuntu Weblog http://steveyoung.wordpress.com Mainly (but not only) about Ubuntu Wed, 11 Nov 2009 18:15:29 +0000 http://wordpress.com/ hourly 1 Comment on Microwave link engineering with Google Maps by steveyoung http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1513 steveyoung Wed, 11 Nov 2009 18:15:29 +0000 http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1513 In the MLOS tool the limit is 80km because the height data is collected for every 90m and distances over 80km would cause to many requests. In the MLET tool please see the answer to Andy Paddon (#23 above). This tool calculates propagation outages caused by flat fading and this applies mainly to frequencies above 18GHz. For 18GHz a distance of ~20km is possible with an availability of around 99.99% so I wouldn't use the tool for longer distances. What distances and frequencies were you using? You *can* anchor one site and move the other around. As stated in the basic instructions "After you have entered your markers you can click on Marker B to make it draggable and then drag it to another location" The 7GHz is in the MLOS tool to show theFresnel zone. It is not icluded in the MLET tool because multipath (selective fading) calculations are not done. In the MLOS tool the limit is 80km because the height data is collected for every 90m and distances over 80km would cause to many requests. In the MLET tool please see the answer to Andy Paddon (#23 above). This tool calculates propagation outages caused by flat fading and this applies mainly to frequencies above 18GHz. For 18GHz a distance of ~20km is possible with an availability of around 99.99% so I wouldn’t use the tool for longer distances. What distances and frequencies were you using?

You *can* anchor one site and move the other around. As stated in the basic instructions “After you have entered your markers you can click on Marker B to make it draggable and then drag it to another location”

The 7GHz is in the MLOS tool to show theFresnel zone. It is not icluded in the MLET tool because multipath (selective fading) calculations are not done.

]]> Comment on Microwave link engineering with Google Maps by ray http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1512 ray Wed, 11 Nov 2009 13:32:42 +0000 http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1512 now that I have played with it a bit, code seems to have an error when dealing with long paths. Shows -55.8 rsl at all locations even at impractical distances. Even if long paths cannot be graphed, would be nice to have edge or terrain blocking notice flag. Would be nice to anchor one site and move the other around on the map. 7GHz pull down available on one of the two tools- Why? now that I have played with it a bit, code seems to have an error when dealing with long paths. Shows -55.8 rsl at all locations even at impractical distances.

Even if long paths cannot be graphed, would be nice to have edge or terrain blocking notice flag.

Would be nice to anchor one site and move the other around on the map.

7GHz pull down available on one of the two tools- Why?

]]> Comment on Microwave link engineering with Google Maps by ray http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1511 ray Wed, 11 Nov 2009 12:21:27 +0000 http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1511 I can see this as a great tool for ENG use. Would love to use this tool with a 2 GHz choice and with longer shots than 80km. I can see this as a great tool for ENG use. Would love to use this tool with a 2 GHz choice and with longer shots than 80km.

]]> Comment on Microwave Link Engineering Tool proving popular in Poland by Piotr http://steveyoung.wordpress.com/2009/10/08/microwave-link-engineering-tool-proving-popular-in-poland/#comment-1510 Piotr Tue, 10 Nov 2009 12:32:01 +0000 http://steveyoung.wordpress.com/?p=150#comment-1510 Hi, I have no idea, if there was an article about this page but you know: frend to fiend, admin to admin and popularity is groving up :-) sincerely PJ Hi,
I have no idea, if there was an article about this page but you know: frend to fiend, admin to admin and popularity is groving up :-)

sincerely

PJ

]]> Comment on Microwave Link Engineering Tool proving popular in Poland by Jarek http://steveyoung.wordpress.com/2009/10/08/microwave-link-engineering-tool-proving-popular-in-poland/#comment-1509 Jarek Sat, 07 Nov 2009 14:03:08 +0000 http://steveyoung.wordpress.com/?p=150#comment-1509 Hi Steve, It's me this time ;-) Just had an issue if I can use 13GHz for links more than 30km. The power level is ok, but usually lower frequency is used. Does it make any sense for such long spans? Kind Regards, Jarek Kala Hi Steve,

It’s me this time ;-) Just had an issue if I can use 13GHz for links more than 30km. The power level is ok, but usually lower frequency is used. Does it make any sense for such long spans?

Kind Regards,
Jarek Kala

]]> Comment on Apache2 SSI (Server Side Includes) Part II by Jacob Steelsmith http://steveyoung.wordpress.com/2007/02/05/apache2-ssi-server-side-includes-part-ii/#comment-1507 Jacob Steelsmith Tue, 03 Nov 2009 16:42:09 +0000 http://steveyoung.wordpress.com/2007/02/05/apache2-ssi-server-side-includes-part-ii/#comment-1507 Thanks for the tip. I think an easier way is to use a2enmod. $ sudo a2enmod include && sudo /etc/init.d/apache2 force-reload Thanks for the tip. I think an easier way is to use a2enmod.

$ sudo a2enmod include && sudo /etc/init.d/apache2 force-reload

]]> Comment on Google maps applications by steveyoung http://steveyoung.wordpress.com/2008/02/03/google-maps-applications/#comment-1506 steveyoung Sat, 31 Oct 2009 21:14:48 +0000 http://steveyoung.wordpress.com/?p=50#comment-1506 Sorry I don't really understand your question/statement. The maps are from Google maps, the height data is SRTM3 (The Shuttle Radar Topography Mission) data. Sorry I don’t really understand your question/statement. The maps are from Google maps, the height data is SRTM3 (The Shuttle Radar Topography Mission) data.

]]> Comment on Microwave link engineering with Google Maps by steveyoung http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1505 steveyoung Sat, 31 Oct 2009 21:04:00 +0000 http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1505 No, not unless you want to buy the tool. The tool is copyrighted. No, not unless you want to buy the tool. The tool is copyrighted.

]]> Comment on Microwave link engineering with Google Maps by mutasem http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1503 mutasem Fri, 30 Oct 2009 17:50:37 +0000 http://steveyoung.wordpress.com/2007/11/19/microwave-link-engineering-with-google-maps/#comment-1503 i need to download the micrwave links budget calculator on my pc, would you please help me i need to download the micrwave links budget calculator on my pc, would you please help me

]]> Comment on Google maps applications by Reda http://steveyoung.wordpress.com/2008/02/03/google-maps-applications/#comment-1502 Reda Wed, 21 Oct 2009 14:15:37 +0000 http://steveyoung.wordpress.com/?p=50#comment-1502 Dear Steve I need to know if this result depending on real time google map information or database stored in google map because in 2nd case all pathloss calculation will be unaccourate WBR reda Dear Steve
I need to know if this result depending on real time google map information or database stored in google map because in 2nd case all pathloss calculation will be unaccourate
WBR
reda

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