MediaWiki API result

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                                "*": "[[File:DespatchFm_4.jpg|300px|right|thumb| DESPATCH flight model]]\n\n\"DESPATCH\" (DEep SPace Amateur Troubadour\u2019s CHallenge) is the second spacecraft in the ARTSAT series. \nThis spacecraft will be launched into an Earth escape trajectory December 2014, along with the Hayabusa-2 asteroid probe. \nIn this page, DESPATCH design, subsystems, and trajectory are detailed. \n\nAs a main mission of DESPATCH, \nwe attempt to collect signals from the spacecraft received not only at our own radio station in Tokyo, \nbut at many ham radio stations around the world to reconstruct them back into the original data from the spacecraft. \nIn the following page, the details of the experiment and how to join it are explained. \n*[[Cooperative_Data_Reconstruction|Details of the experiment on cooperative data reconstruction]]\n\n\n==ARTSAT Project==\nThe \u201cARTSAT: Art and Satellite Project\u201d utilizes a satellite orbiting Earth as a \u201cmedium that connects everyday life to the space.\u201d \nIn the course of the project, a variety of interactive works of media art and other artworks are being created. \nThe project is carried out in a collaborative effort around a core team of over 70 members from Tama Art University and The University of Tokyo. \nThe latter team designs and develops satellites and spacecrafts for artistic missions, \nwhile the team from Tama Art University is in charge of producing works based on data from the satellite, operating a ground station, and distributing data.\n\n*[http://artsat.jp/ ARTSAT official site]\n*[https://www.facebook.com/artsat ARTSAT Facebook page]\n\n==ARTSAT2: DESPATCH==\n[[File:DespatchEm_VibrationTest.jpg|360px|right|thumb|A full-scale prototype (engineering model) of DESPATCH]]\n\"ARTSAT2: DESPATCH\" is the second mission of the ARTSAT project. \nThis spacecraft, 50x50x45 cm in size with a mass of 32 kg has a helix-shaped segment making it a beautiful sculpture. \nDESPATCH will be launched into an Earth escape trajectory at \n<span style=\"color:red\">December 3, 2014 13:22:04, JST (UTC+9)</span>\n.\n*[http://global.jaxa.jp/press/2014/11/20141130_h2af26.html Launch Postponement of Hayabusa2 by H-IIA Launch Vehicle No. 26]\n\n===Missions===\nDESPATCH has both artistic and technical missions, as described below. \n\n*'''Artistic missions:'''\n**To create a \"deep-space sculpture\u201d by launching the spacecraft into an Earth escape trajectory\n**To create \u201cgenerative poetry\" in the deep space and transmit the poetry from the spacecraft for reception on Earth\n\n*'''Technical missions:'''\n**To experiment with the possibilities of receiving very weak signals using a \"cooperative diversity communication\" approach, in which fragmented transmissions sent from the spacecraft are received around the world, gathered, and reconstructed\n**To test the use of 3D-printed parts for spacecraft\n\n\nOne of the artistic missions, \u201dgenerative poetry,\u201d is a broadcast of sentences in English. \nThey are automatically generated by software running on the spacecraft\u2019s on-board computer (OBC). \nThe poetry generator is \u201cseeded\u201d using sensor readings such as temperature, angular velocity of the spacecraft, etc.\nFor details of the \"generative poetry\" and \"cooperative diversity communication,\" please see the following page. \n*[[Cooperative_Data_Reconstruction|Details of the experiment on cooperative data reconstruction]]\n\n===Features===\nTo complete these missions, DESPATCH will be operating under three unusual parameters: \n\n*The spacecraft will transmit the signals for only a week until it reaches a distance of 3 million km from Earth\n*It is battery-powered (rather than solar-powered) enabling a highly flexible design\n*No uplink command will be sent to the spacecraft \u2014 the unit being designed to operate autonomously\n\n==Structure and Design==\n===Appearance design===\n<gallery caption=\"CGI renderings of DESPATCH\" widths=\"220px\" heights=\"220\" perrow=\"3\">\nFile:DespatchCgi_1.png\nFile:DespatchCgi_4.png\nFile:DespatchCgi_3.png\n<!--File:DespatchCgi_2.png-->\n</gallery>\n<gallery caption=\"Appearance of DESPATCH flight model\" widths=\"220px\" heights=\"220\" perrow=\"3\">\nFile:DespatchFm_1.jpg\nFile:DespatchFm_4.jpg\nFile:DespatchFm_3.jpg\n<!--File:DespatchFm_2.jpg-->\n</gallery>\n\n*[http://artsat.jp/project/despatch/3d-model DESPATCH 3D viwer]\n\n===Structure and components layout===\n[[File:InternalStructure.png|450px|thumb|left| Structure/Components layout of DESPATCH]]\n[[File:CoordSystem.png|460px|thumb|none|Six-view drawing of DESPATCH]]\n\n==Electric System==\n[[File:BlockDiagram.png|420px|thumb|left|Function block diagram of DESPATCH]]\n[[File:MainAndMorikawaBoards.JPG|520px|thumb|none| Main board and Mission board (MORIKAWA)]]\n\n==Communication System==\nTo conduct the experiment on cooperative data reconstruction, \nwe will need the cooperation of as many ham operators as possible. \nFor this reason, the 430 MHz band was selected, being the most commonly used frequency in amateur radio satellite communications.\n\nCW was selected as the modulation mode \u2014 one of the simplest modulations each bit (1/0) represented as existence or non-existence of the carrier signal. \nTransmitting high-power signals modulated in this simple manner is expected to raise the probability of the signals being received. \nIn addition, simple modulation will make it easier for ham operators to add their own \u201chacks\u201d to their hardware \u2014 which should result in a heterogeneous redundant system for reception.\n\nThe spacecraft is equipped with a transmitter specified in the following table. \nThis transmitter was designed and developed by [http://www.nishimusen.co.jp/eisei2013/eisei2013.htm Nishi Musen Kenkyuusho co, Ltd]. \n\n{|class=\"wikitable\" style=\"width:50%\" \n|+Specifications of the transmitter\n|RF power || 7W\n|-\n|Transmission frequency || 437.325MHz\n|-\n|Modulation mode|| CW\n|-\n|Power supply voltage || +7V DC\n|-\n|Power consumption || Max. 24.5 W\n|-\n|Carrier frequency stability || Max. \u00b10.3ppm (\u00b1130 Hz) \n|}\n\nThis transmitter is controlled by an on-board computer and an integrated-circuit timer. \nSignals are transmitted using a monopole antenna. \nThe following figures show the simulated antenna patterns. \nThis antenna is attached to a support rod which is located at the center of the helix part. \n\n<gallery caption=\"Simulated antenna pattern of DESPATCH\" widths=\"400px\" heights=\"140px\" perrow=\"2\">\nFile:AntennaGain_1.jpg\nFile:AntennaGain_2.jpg\nFile:AntennaGain_3.jpg\nFile:AntennaCoord.png\n</gallery>\n\nThe result of the link calculation at our radio station can be downloaded here: \n*[http://artsat.jp/wp-content/uploads/2014/11/Despatch_LinkMargin_ver1.0.xls Link margin calculation ver1.0] (.xls)\n\nIf you want to know the format of the data which is sent to Earth by this transmitter, please see the following page. \n*[[Cooperative_Data_Reconstruction|Details of the experiment on cooperative data reconstruction]]\n\n==Trajectory==\nDESPATCH will go parallel to Earth after being injected into an Earth escape trajectory as shown in the figure below. \nIt will come the closest to Earth every year. \n\n[[File:OrbitSim.png|370px|thumb|left| DESPATCH trajectory]]\n[[File:Distance1year.png|370px|thumb|none| Transition in distance between Earth and the spacecraft]]\n\n\nSpacecraft in Earth escape trajectory will appear to move more slowly in the sky than satellites in low Earth orbit. \nIn the following pages, you can find the present position of DESPATCH.\n\n*[http://artsat.jp/project/despatch/orbit Orbital Position of DESPATCH]\n\n*[http://artsat.jp/project/despatch/celestial Celestial Position of DESPATCH]\n\n==Links==\n*ARTSAT official site\n**http://artsat.jp/en/\n*SNS\n**https://www.facebook.com/artsat\n**https://twitter.com/DESPATCH_ARTSAT\n**https://twitter.com/artsat_satoru\n*GitHub\n**https://github.com/artsat\n\n\n[[File:Tatlin-Smithson-ARTSAT.png|1024px|thumb|none|Tatlin-Smithson-ARTSAT]]\n\n==Contact==\ninfo@artsat.jp"
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