De volgende waarschuwingen zijn opgetreden:
Warning [2] Undefined array key "lockoutexpiry" - Line: 94 - File: global.php PHP 8.0.30 (Linux)
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/global.php 94 errorHandler->error
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$today_rel - Line: 474 - File: inc/functions.php PHP 8.0.30 (Linux)
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/inc/functions.php 474 errorHandler->error
/global.php 471 my_date
/printthread.php 16 require_once
Warning [2] Undefined array key "lockoutexpiry" - Line: 550 - File: global.php PHP 8.0.30 (Linux)
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/global.php 550 errorHandler->error
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$search_button - Line: 5 - File: global.php(574) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(574) : eval()'d code 5 errorHandler->error
/global.php 574 eval
/printthread.php 16 require_once
Warning [2] Undefined array key "avatartype" - Line: 811 - File: global.php PHP 8.0.30 (Linux)
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/global.php 811 errorHandler->error
/printthread.php 16 require_once
Warning [2] Undefined array key "avatartype" - Line: 811 - File: global.php PHP 8.0.30 (Linux)
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/global.php 811 errorHandler->error
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_match - Line: 15 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(869) : eval()'d code 15 errorHandler->error
/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_matches - Line: 16 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_nomatches - Line: 17 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(869) : eval()'d code 17 errorHandler->error
/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_inputtooshort_single - Line: 18 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_inputtooshort_plural - Line: 19 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(869) : eval()'d code 19 errorHandler->error
/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_inputtoolong_single - Line: 20 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_inputtoolong_plural - Line: 21 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(869) : eval()'d code 21 errorHandler->error
/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_selectiontoobig_single - Line: 22 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php(869) : eval()'d code 22 errorHandler->error
/global.php 869 eval
/printthread.php 16 require_once
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/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_loadmore - Line: 24 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/global.php 869 eval
/printthread.php 16 require_once
Warning [2] Undefined property: MyLanguage::$select2_searching - Line: 25 - File: global.php(869) : eval()'d code PHP 8.0.30 (Linux)
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/printthread.php 16 require_once
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/printthread.php 16 require_once
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/printthread.php 16 require_once
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/inc/functions.php 5197 errorHandler->error
/global.php 937 build_theme_select
/printthread.php 16 require_once
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/inc/functions.php 7361 errorHandler->error
/inc/functions.php 5217 is_member
/global.php 937 build_theme_select
/printthread.php 16 require_once
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/global.php 966 eval
/printthread.php 16 require_once
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/printthread.php 160 errorHandler->error
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/printthread.php 165 errorHandler->error
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/inc/class_parser.php 866 errorHandler->error
/inc/class_parser.php 938 postParser->mycode_parse_post_quotes
[PHP]   postParser->mycode_parse_post_quotes_callback1
/inc/class_parser.php 816 preg_replace_callback
/inc/class_parser.php 451 postParser->mycode_parse_quotes
/inc/class_parser.php 201 postParser->parse_mycode
/printthread.php 179 postParser->parse_message
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/inc/class_parser.php 938 postParser->mycode_parse_post_quotes
[PHP]   postParser->mycode_parse_post_quotes_callback1
/inc/class_parser.php 816 preg_replace_callback
/inc/class_parser.php 451 postParser->mycode_parse_quotes
/inc/class_parser.php 201 postParser->parse_mycode
/printthread.php 179 postParser->parse_message



Forum Technology Interest Group Erpe-Mere
SDR zichtverbinding. Maximale afstand. - Afdrukversie

+- Forum Technology Interest Group Erpe-Mere (http://www.on4lar.be/forum)
+-- Forum: hardware en software (http://www.on4lar.be/forum/forumdisplay.php?fid=4)
+--- Forum: SDR (http://www.on4lar.be/forum/forumdisplay.php?fid=5)
+--- Discussie: SDR zichtverbinding. Maximale afstand. (/showthread.php?tid=6)

SDR zichtverbinding. Maximale afstand. - on4cbn - 02-21-2013

ON5QT schreef:www.pi3zdm.nl/horizon.html
Hier kan je berekenen tot welke afstand de data van de vliegtuigen nog te ontvangen zijn. De berekening houdt geen rekening met de frequentie. Er kan wel een aanzienlijke foutmarge zijn ivm weersomstandigheden, freq. ed. maar je hebt dan wel een idee.
Grtn M.

Knap !
Ik zou theoretisch met een antennehoogte van 5 meter en een vliegtuig op 11.000 meter dus zichtverbinding hebben tot 382 km.

Ik zit natuurlijk ook wel met vele obstakels, bomen, gebouwen ...
Tot nu toe verste :
179.4 nautical miles = 332 kilometer in oostelijke richting