{"id":43077,"date":"2015-07-06T14:50:22","date_gmt":"2015-07-06T12:50:22","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=43077"},"modified":"2023-10-06T10:22:37","modified_gmt":"2023-10-06T08:22:37","slug":"geosynchronous-satellites-by-amsat","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/ham-radio-news\/geosynchronous-satellites-by-amsat\/","title":{"rendered":"Geosynchronous Satellites by AMSAT"},"content":{"rendered":"

 <\/p>\n

AMSAT-NA announced in late April 2015 that, if all goes according to plan, an Amateur Radio payload will go into space on a geosynchronous satellite planned for launch in 2017<\/a>.<\/strong><\/p>\n

The ARRL report that AMSAT-NA has accepted the opportunity to be a \u201chosted payload\u201d on a spacecraft that Millennium Space Systems (MSS) of El Segundo, California, is under contract to design, launch, and operate for the US government. The satellite\u2019s potential footprint could extend over the US from the Mid-Pacific to Africa.<\/p>\n

The amateur radio payload will comprise a Software Defined Transponder capable of supporting many different modes, including analog SSB. The uplink will be in the 5830-5840 MHz band and the downlink in 10450-10500 MHz. The Amateur Radio payload must be delivered for testing and integration by spring 2016.<\/p>\n

AMSAT-NA Vice President-Engineering Jerry Buxton, N0JY, explained that the geosynchronous footprint will not be absolutely fixed; some variation may require some up\/down movement of the user\u2019s dish at certain times \u2014 although not continuously. He said AMSAT-NA is working on this issue in terms of what to recommend for ground stations, but that even in the worst case, a user with a fixed antenna would still be able to enjoy several hours of access each day.<\/p>\n

Further information on the North American geosynchronous satellite
\nhttp:\/\/amsat-uk.org\/satellites\/geosynchronous\/na-gso-sat\/<\/a><\/p>\n

Geostationary Orbit<\/p>\n

A special case of geosynchronous orbit is the Geostationary Earth Orbit (GEO) which is a circular geosynchronous orbit at zero inclination (that is, directly above the equator). A satellite in a geostationary orbit appears stationary, always at the same point in the sky, to ground observers. This means the ground station antennas do not have to move, but can be pointed permanently at the fixed location in the sky where the satellite appears.<\/p>\n

Qatar\u2019s Es\u2019hail 2 geostationary satellite will carry amateur radio transponders that could link amateurs from Brazil to India. The satellite is expected to launch by the end of 2016 and will be positioned at 25.5 degrees East.<\/p>\n

Es\u2019hail 2 will carry two \u201cPhase 4\u201d amateur radio transponders operating in the 2400 MHz and 10450 MHz bands. A 250 kHz bandwidth linear transponder intended for conventional analogue operations and an 8 MHz bandwidth transponder for experimental digital modulation schemes and DVB amateur television.<\/p>\n

Linear transponder
\n2400.050 – 2400.300 MHz Uplink
\n10489.550 – 10489.800 MHz Downlink
\nWideband digital transponder
\n2401.500 – 2409.500 MHz Uplink
\n10491.000 – 10499.000 MHz Downlink<\/p>\n

Source .AMSAT-UK<\/p>\n","protected":false},"excerpt":{"rendered":"

  AMSAT-NA announced in late April 2015 that, if all goes according to plan, an Amateur Radio payload will go into space on a geosynchronous satellite planned for launch in 2017. The ARRL report that AMSAT-NA has accepted the opportunity to be a \u201chosted payload\u201d on a spacecraft that Millennium Space Systems (MSS) of El…<\/p>\n","protected":false},"author":2,"featured_media":43078,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[5],"tags":[190,194,203,234],"class_list":["post-43077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ham-radio-news","tag-ham","tag-ham_radio","tag-hamradio","tag-info","category-5","description-off"],"_links":{"self":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/43077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/comments?post=43077"}],"version-history":[{"count":0,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/43077\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media\/43078"}],"wp:attachment":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media?parent=43077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/categories?post=43077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/tags?post=43077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}