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UrtheCast is a Vancouver-based Canadian company that will distribute the operational software for the first publicly accessible high definition cameras installed on the International Space Station. The company went public on the Toronto Stock Exchange in June 2013.〔(UrtheCast Announces the Completion of Reverse Takeover Transaction and Private Placement ), Newswire Canada, 24 June 2013.〕 ==ISS== The camera systems to be operated by UrtheCast are part of an international project involving several nations, primarily Russia (through the Russian Space Agency), Canada and the United Kingdom. The UrtheCast service will be accessible online and will allow users to access the two UrtheCast cameras from their homes to examine places or events. One medium resolution and one high resolution camera have been built by the British Rutherford Appleton Laboratory (RAL).〔(World's first 'live' video feed of Earth from space ), RAL Space Home.〕 The resolution on the ground is given as 5.5 m (18 ft) for medium resolution and 1.1 m (3 ft 7.2 in) for high resolution.〔(Camera features intro ), UrtheCast Home.〕〔(Frequently Asked Questions ), Urthecast Home.〕 The UrtheCast platform utilizes some measure of open source coding.〔(UrtheCast For Developers )〕 The company held a contest for the naming of cameras, with "Iris" as the chosen name. The cameras were delivered to the ISS on the Progress M-21M (Progress 53P) cargo spacecraft, which docked with the station on 29 November 2013. On 27 December 2013, an attempt was made to install the cameras on the Russian Zvezda module of the ISS, during a spacewalk by Russian cosmonauts Oleg Kotov and Sergey Ryazansky, which also broke the record for the longest Russian spacewalk ever.〔(Russian duo break EVA record – Main task suffers issue ), nasaspaceflight.com, 27 December 2013.〕 A problem occurred that prevented the cameras from properly transmitting telemetry data, so the installation was not completed and the cameras were taken back inside the space station. A second attempt to install the cameras, by the same pair of spacewalkers, was made on 27 January 2014.〔(Russian EVA duo install Earth-observing cameras ), nasaspaceflight.com, 27 January 2014.〕 The high resolution camera was successfully installed. The second of the two cameras, the medium-resolution unit, did not send any telemetry. The delay installing the pair of cameras is not expected to hold up UrtheCast's plans.〔(Cosmonauts Repeat Spacewalk to Add Earth-viewing Cameras to Space Station )〕 It was reported later on that they were able to resolve the connectivity issues so that as of this time, both cameras are installed.〔(CANADA’S URTHECAST TELESCOPES NOW UP AND RUNNING )〕 In August 2014, Urthecast's imagery from its medium resolution camera, Theia "hit the market". There is a page for ordering the imagery but you have to provide your name, email and organization.〔(Urthecast Blog )〕 As of November 2014, UrtheCast is yet to announce when its service will become operational. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Urthecast」の詳細全文を読む スポンサード リンク
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