{"id":733,"date":"2023-12-14T19:59:49","date_gmt":"2023-12-14T19:59:49","guid":{"rendered":"https:\/\/144.202.43.223\/?p=733"},"modified":"2024-10-15T19:52:09","modified_gmt":"2024-10-15T23:52:09","slug":"amsat-uk-and-amsat-nl-have-restarted-the-transponder-on-ao-73","status":"publish","type":"post","link":"https:\/\/kp3re.org\/?p=733","title":{"rendered":"AMSAT-UK and AMSAT-NL have restarted the transponder on AO-73."},"content":{"rendered":"\n<p>From the AMSAT-BB mailing list:<\/p>\n\n\n\n<p>After a year long period of &#8216;battery management&#8217;, AMSAT-UK and AMSAT-NL have restarted the transponder on AO-73.<\/p>\n\n\n\n<p>After 10 years in orbit, the battery on the satellite has reduced capacity and until recently, has been unable to charge to the nominal 8.3V.<\/p>\n\n\n\n<p>Following some careful battery management, where the transmitter was off during eclipse, the battery status has improved and the transponder has been reactivated.<\/p>\n\n\n\n<p><a><\/a>Although the battery voltage is varying between 8.13 in sunlight and 7.8V at the end of eclipse, this is much improved on the situation earlier in the year.<\/p>\n\n\n\n<p>Low power BPSK telemetry is transmitted on 145.935MHz<\/p>\n\n\n\n<p>The inverting mode U\/V transponder input is 435.130 to 435.150MHz<\/p>\n\n\n\n<p>The transponder downlink is 145.970 to 145.950MHz<\/p>\n\n\n\n<p>At the moment the satellite has a high spin rate of apx. 30 rpm and if you&#8217;ve not used AO-73 before, the downlink can be Doppler tracked successfully, but the input on 70cms is best tuned manually due to temperature drift of the receiver.<\/p>\n\n\n\n<p>73<\/p>\n\n\n\n<p>David G0MRF &#8211; AMSAT-UK<\/p>\n","protected":false},"excerpt":{"rendered":"<p>From the AMSAT-BB mailing list: After a year long period of &#8216;battery management&#8217;, AMSAT-UK and AMSAT-NL have restarted the transponder<\/p>\n","protected":false},"author":1,"featured_media":735,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[31],"tags":[],"class_list":["post-733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archive"],"_links":{"self":[{"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/posts\/733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kp3re.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=733"}],"version-history":[{"count":3,"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/posts\/733\/revisions"}],"predecessor-version":[{"id":742,"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/posts\/733\/revisions\/742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kp3re.org\/index.php?rest_route=\/wp\/v2\/media\/735"}],"wp:attachment":[{"href":"https:\/\/kp3re.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kp3re.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kp3re.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}