{"id":59,"date":"2013-01-27T08:45:52","date_gmt":"2013-01-27T08:45:52","guid":{"rendered":"http:\/\/honza.paws.cz\/?page_id=59"},"modified":"2013-02-12T22:18:30","modified_gmt":"2013-02-12T21:18:30","slug":"radiostanice","status":"publish","type":"page","link":"http:\/\/honza.paws.cz\/?page_id=59","title":{"rendered":"Radiostanice"},"content":{"rendered":"<p style=\"text-align: justify;\">Ne nen\u00ed to \u017e\u00e1dn\u00e1 radiostanice, m\u00e1m jen softwarov\u00e9 r\u00e1dio pro p\u0159\u00edjem. P\u0159i hled\u00e1n\u00ed jak se v\u016fbec d\u011bl\u00e1 radioastronomie, respektive z\u00e1znam odraz\u016f meteor\u016f prol\u00e9taj\u00edc\u00edch atmosf\u00e9rou, nalezl jsem informace, \u017ee televizn\u00ed krabi\u010dky do USB, kter\u00e9 jsou obsazen\u00e9 \u010dipsetem Realtek rtl2832u a vhodn\u00fdm tunerem jsou schopny dodat surov\u00e1 data pro zpracov\u00e1n\u00ed softwarem a to na frekvenc\u00edch od 50 MHz n\u011bkdy a\u017e p\u0159es 2 GHz, v\u017edy ale z\u00e1le\u017e\u00ed na dan\u00e9m tuneru. J\u00e1 jsem prov\u00e1hal posledn\u00ed kousky od Sencoru, kter\u00fd st\u00e1l je\u0161t\u011b solidn\u00edch 400 K\u010d, objedn\u00e1vka le\u017eela na eshopu dobr\u00e9 t\u0159i m\u011bs\u00edcce a nikdo \u017e\u00e1dn\u00fd u\u017e nesehnal. Za\u0159\u00eddil jsem si platby p\u0159es internet a koupil krabi\u010dku z \u010c\u00edny (dx.com) za velmi p\u011bkn\u00fdch $13, dnes 250 K\u010d.<\/p>\n<div id=\"attachment_68\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/honza.paws.cz\/?attachment_id=68\" rel=\"attachment wp-att-68\"><img aria-describedby=\"caption-attachment-68\" loading=\"lazy\" class=\"size-medium wp-image-68\" alt=\"Krabi\u010dka z dx.com\" src=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8120-300x199.jpg\" width=\"300\" height=\"199\" srcset=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8120-300x199.jpg 300w, http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8120-624x414.jpg 624w, http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8120.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-68\" class=\"wp-caption-text\">Krabi\u010dka z dx.com<\/p><\/div>\n<p style=\"text-align: justify;\">Ta obsahuje tuner Rafael Micro R820T, d\u0159\u00edve fr\u010dely krabi\u010dky s tunerem Elonics E4000, kter\u00e9 u\u017e na dx moc nejsou, nebo jsou mnohem dra\u017e\u0161\u00ed, ne\u017e ta, kterou jsem koupil j\u00e1, doufaje, \u017ee bude stejn\u011b dobr\u00e1. Jedin\u00e1 vada na kr\u00e1se je konektor MCX, ale za 60 K\u010d jsem koupil dr\u00e1tovou p\u0159echodku z IEC a je vy\u0159e\u0161eno. Pap\u00edrov\u011b se d\u00e1 ladit od 25 MHz do 1,7 \u00a0 GHz, co\u017e obn\u00e1\u0161\u00ed v\u0161echno, co by si \u010dlov\u011bk mohl p\u0159\u00e1t. zat\u00edm jsem vyzkou\u0161el samoz\u0159ejm\u011b FM r\u00e1dia, kter\u00e1 chyt\u00e1te v aut\u011b, prvn\u00ed par\u00e1dn\u00ed v\u011bc, kter\u00e1 se m\u011b povedla byl p\u0159\u00edjem sn\u00edmk\u016f ze satelit\u016f NOAA, kter\u00fd nen\u00ed slo\u017eit\u00fd, dok\u00e1\u017eete-li si naoh\u00fdbat dr\u00e1ty ve tvaru \u0161roubovice coby v\u0161esm\u011brovou ant\u00e9nu QFH ur\u010denou pro p\u00e1smo 137\u00a0MHz.<\/p>\n<div id=\"attachment_76\" style=\"width: 209px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/honza.paws.cz\/?attachment_id=76\" rel=\"attachment wp-att-76\"><img aria-describedby=\"caption-attachment-76\" loading=\"lazy\" class=\"size-medium wp-image-76\" alt=\"Celkov\u00fd pohled na ant\u00e9nu.\" src=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8129-199x300.jpg\" width=\"199\" height=\"300\" srcset=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8129-199x300.jpg 199w, http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8129.jpg 532w\" sizes=\"(max-width: 199px) 100vw, 199px\" \/><\/a><p id=\"caption-attachment-76\" class=\"wp-caption-text\">Celkov\u00fd pohled na ant\u00e9nu.<\/p><\/div>\n<p style=\"text-align: justify;\">Ant\u00e9nu jsem postavil podle n\u00e1vodu na adrese <a href=\"http:\/\/www.ok2pya.wz.cz\/qfh\/\" target=\"_blank\">http:\/\/www.ok2pya.wz.cz\/qfh\/<\/a>. Nikde to nenap\u00ed\u0161ou, tak mo\u017en\u00e1 budu prvn\u00ed, kdo to ud\u011bl\u00e1 polopat\u011b. Pokud jste laik, jako j\u00e1, nejsp\u00ed\u0161 nepochop\u00edte hned v\u0161echny n\u00e1kresy. Princip ant\u00e9ny je jednoduch\u00fd, moje je ud\u011blan\u00e1 z jedin\u00e9ho kusu hlin\u00edkov\u00e9ho dr\u00e1tu. Jednodu\u0161e navrt\u00e1te d\u00edry podle p\u0159edlohy do plastov\u00e9 trubky, vezmete dostate\u010dn\u011b dlouh\u00fd dr\u00e1t a rozm\u011b\u0159\u00edte si jednotliv\u00e9 \u00faseky. Za\u010dn\u011bte od st\u0159edu dr\u00e1tu, kter\u00fd je na st\u0159edu spojnic &#8222;del\u0161\u00edch smy\u010dek&#8220;, tedy v ni\u017e\u0161\u00ed d\u00ed\u0159e, nesple\u0165te sm\u011br rotace a dosta\u0148te oba konce dr\u00e1tu a\u017e do protilehl\u00e9ho otvoru na budouc\u00ed \u0161pici ant\u00e9ny a znovu ve spr\u00e1vn\u00e9m sm\u011bru prot\u00e1hn\u011bte do otvor\u016f &#8222;krat\u0161\u00edch smy\u010dek&#8220; a po rotaci spojte oba dosavadn\u00ed konce, tak aby vznikla nekone\u010dn\u00e1 smy\u010dka. T\u00edm, \u017ee pou\u017eijete jedin\u00fd dr\u00e1t, nebude t\u0159eba pracn\u011b spojovat dvojice smy\u010dek naho\u0159e \u010di dole a vyv\u00e1\u0159et p\u0159emr\u0161t\u011bn\u011b slo\u017eit\u00e9 struktury je\u0161t\u011b s koaxi\u00e1ln\u00edm kabelem. Ten jsem p\u0159ipojil velice nep\u011bkn\u011b stahovac\u00ed p\u00e1skou, proto\u017ee p\u00e1jka n\u011bjak nedr\u017e\u00ed a \u010dekul\u00e1dy jsem zapomn\u011bl nasunout p\u0159edem. V\u0161ak ono to n\u011bjak funguje.<\/p>\n<div id=\"attachment_75\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/honza.paws.cz\/?attachment_id=75\" rel=\"attachment wp-att-75\"><img aria-describedby=\"caption-attachment-75\" loading=\"lazy\" class=\"size-medium wp-image-75\" alt=\"P\u0159ipojen\u00ed 75 \u03a9 koaxu.\" src=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8128-300x199.jpg\" width=\"300\" height=\"199\" srcset=\"http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8128-300x199.jpg 300w, http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8128-624x414.jpg 624w, http:\/\/honza.paws.cz\/wp-content\/uploads\/2013\/01\/IMGP8128.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-75\" class=\"wp-caption-text\">P\u0159ipojen\u00ed 75&nbsp;\u03a9 koaxu.<\/p><\/div>\n<p style=\"text-align: justify;\">Jsem stoupenec Linuxu, na kter\u00e9m je v\u0161e pot\u0159ebn\u00e9 bezbolestn\u011b dostupn\u00e9. Skv\u011bl\u00fd n\u00e1stroj s grafick\u00fdm rozhran\u00edm je GQRX. Program GPredict v\u00e1m prozrad\u00ed, kdy se satelit objev\u00ed na obloze, v GQRX nastav\u00edte u\u017eivatelsk\u00fd filtr na 45 kHz, re\u017eim na Wide FM (mono) nech\u00e1te pracovat AGC, dole posuvn\u00edkem nastav\u00edte pot\u0159ebn\u00e9 zes\u00edlen\u00ed zaznamen\u00e1van\u00e9ho zvuku a a\u017e dru\u017eice p\u0159ilet\u00ed nahrajete si zvuk. NEBO: M\u00f3d: Narrow FM, kliknout na nastaven\u00ed hned vedle v\u00fdb\u011bru m\u00f3du, &bdquo;Max dev&ldquo; na APT, &bdquo;Tau&ldquo; na &bdquo;Off&ldquo;. Zes\u00edlen\u00ed zvuku nechte na -20&nbsp;dB a nahrajte zvuk do souboru. Ten je t\u0159eba p\u0159ekousat programem sox pomoc\u00ed p\u0159\u00edkazu:<\/p>\n<pre>sox gqrx-20130126-123921.wav output.wav rate 11025<\/pre>\n<p>Kdy\u017e potom pro\u017eenete output.wav programem wxtoimg, kter\u00fd je dostupn\u00fd v omezen\u00e9 verzi zdarma, dostanete pohled z ob\u011b\u017en\u00e9 dr\u00e1hy Zem\u011b.<br \/>\nV\u010dera jsme poprv\u00e9 poslouchali leteck\u00e9 p\u00e1smo na frekvenci 132,065\u00a0MHz AM, st\u00e1le na tu v\u0161esm\u011brovou QFH ant\u00e9nu, zde navolte \u0161irok\u00fd filtr a re\u017eim AM, zde se hod\u00ed nastavit z\u00e1mek (SQL), tak aby bylo sly\u0161et jen vys\u00edl\u00e1n\u00ed nikoliv \u0161um. P\u0159ipoj\u00edm je\u0161t\u011b zaj\u00edmavost, chytil jsem n\u00e1rodn\u00ed VOLMET (hl\u00e1\u0161en\u00ed o po\u010das\u00ed na nejv\u011bt\u0161\u00edch leti\u0161t\u00edch v republice) na frekvenci 125,525\u00a0MHz a znovu AM, st\u0159edn\u00ed filtr.<br \/>\nA posledn\u00ed v\u011bc, kter\u00e9 jsem zat\u00edm dos\u00e1hl je zachyt\u00e1v\u00e1n\u00ed bal\u00ed\u010dk\u016f syst\u00e9mu APRS. Zm\u00edn\u011bn\u00fd GQRX m\u00e1 dekod\u00e9r t\u011bchto zpr\u00e1v vys\u00edlan\u00fdch bezdr\u00e1tov\u011b, najdete ho v Data &gt; AFSK1200 Decoder. Sta\u010d\u00ed naladit 144,8\u00a0MHz, co\u017e je celoevropsk\u00e1 frekvence APRS, zvolit norm\u00e1ln\u00ed filtr a re\u017eim \u00fazk\u00e9 FM (Narrow FM), nastavit z\u00e1mek (SQL), otev\u0159\u00edt dekod\u00e9r a t\u011b\u0161it se z naskakuj\u00edc\u00edh \u0159\u00e1dek. R\u00e1d bych se do APRS zapojil, pokud to bude m\u00edt smysl pro roz\u0161\u00ed\u0159en\u00ed pokryt\u00ed, ale nejsp\u00ed\u0161 jen pasivn\u011b jako internetov\u00e1 br\u00e1na.<\/p>\n<p><code>21:08:32$ fm OK2JNM-2 to APOT21-0 via OE3XHR-0,OK1CMJ-2 UI PID=F0<br \/>\n!4909.06NS01604.80E# 13.6V 6C PHG35944\/Srtopesin 450 asl.<br \/>\n21:12:28$ fm OE3XHR-0 to APOT2A-0 via OK1CMJ-2 UI PID=F0<br \/>\n&gt;NEBELSTEIN<br \/>\n21:16:03$ fm OK1CMJ-2 to APLTLM-0 via WIDE2-1 UI^ PID=F0<br \/>\nT#008,141,78,084,010,076,00001111<br \/>\n21:16:39$ fm OE3XHR-0 to APOT2A-0 via OK1CMJ-2 UI PID=F0<br \/>\n!4840.27N\/01446.48E&amp;<\/code><\/p>\n<p style=\"text-align: justify;\">C\u00edl pro dal\u0161\u00ed pokusy je zachytit odrazy radaru GRAVES ve Francii, od p\u0159edm\u011bt\u016f prol\u00e9taj\u00edc\u00edch atmosf\u00e9rou, tedy t\u011bch meteor\u016f, u kter\u00fdch jsem za\u010dal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ne nen\u00ed to \u017e\u00e1dn\u00e1 radiostanice, m\u00e1m jen softwarov\u00e9 r\u00e1dio pro p\u0159\u00edjem. P\u0159i hled\u00e1n\u00ed jak se v\u016fbec d\u011bl\u00e1 radioastronomie, respektive z\u00e1znam odraz\u016f meteor\u016f prol\u00e9taj\u00edc\u00edch atmosf\u00e9rou, nalezl jsem informace, \u017ee televizn\u00ed krabi\u010dky do USB, kter\u00e9 jsou obsazen\u00e9 \u010dipsetem Realtek rtl2832u a vhodn\u00fdm tunerem jsou schopny dodat surov\u00e1 data pro zpracov\u00e1n\u00ed softwarem a to na frekvenc\u00edch od 50 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/pages\/59"}],"collection":[{"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/honza.paws.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=59"}],"version-history":[{"count":16,"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/pages\/59\/revisions"}],"predecessor-version":[{"id":63,"href":"http:\/\/honza.paws.cz\/index.php?rest_route=\/wp\/v2\/pages\/59\/revisions\/63"}],"wp:attachment":[{"href":"http:\/\/honza.paws.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=59"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}