Imai Y.,SKY Perfect JSAT Corporation |
Kunihito I.,SKY Perfect JSAT Corporation |
Takahito O.,SKY Perfect JSAT Corporation
IDW'10 - Proceedings of the 17th International Display Workshops | Year: 2010
SKY Perfect TV started broadcasting 3D channel from June 2010 and carried out the test shooting and the examination for a safe and easy-to-watch 3D broadcast. We studied the cause of fatigue and discomfort in watching 3D image by using images of soccer game and that of a woman. © 2010 ITE and SID.
Suematsu N.,Tohoku University |
Kameda S.,Tohoku University |
Oguma H.,National Institute of Technology, Toyama College |
Sasanuma M.,SKY Perfect JSAT Corporation |
And 2 more authors.
2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014 | Year: 2015
In the event of large scale disaster such as the great east Japan earthquake, we completely lose the terrestrial communication infrastructure and have no measure to call the outside of the disaster area. Satellite communication is only an exception and can be usable in such a situation. In this project, funded by the Ministry of Internal Affairs and Communication (MIC), Japan, we have developed a portable multi-mode very small aperture terminal (VSAT) system for disaster-resilient wireless networks. In order to realize multi-mode functionality, the VSAT indoor unit (IDU) has been developed based on the software defined radio (SDR) technology. It can be used as a wireless-local area network (W-LAN) router which is connected to 3rd generation (3G) cellular/Long Term Evolution (LTE) in the normal situation. In the case of the disaster, the connection will be changed to the satellite communication route and will provide the Internet environment to the evacuees nearby this VSAT IDU. It can also provide the dual-connection using SDR technology; one is Internet connection via private VSAT network (EsBird, provided by SKY Perfect JSAT) and another is the local authorities satellite communications network system connection via Local Authorities Satellite Communications Organization (LASCOM) network By combining the automatic uplink access test (UAT) outdoor unit (ODU), a set of IDU and ODU can be easily carried and installed by the evacuees and it will operate more than a week by the electric power supplied from a hybrid vehicle (HV) with a fill-up gas tank. In this project, digital front-end technologies for VSAT's transceiver has also been developed. The demonstration of developed VSAT was carried out in the disaster stricken area. Copyright 2014 IEICE.
Yuze H.,University of Shizuoka |
Nabeta S.,Shizuoka Gakuen High School |
Ito Y.,Media Mix Shizuoka Co. |
Kosaka H.,SKY Perfect JSAT Corporation |
Shibata Y.,Iwate Prefectural University
Proceedings - IEEE 30th International Conference on Advanced Information Networking and Applications Workshops, WAINA 2016 | Year: 2016
To cope with large-scale disasters, we have been developing the Autonomous Anti-disaster Base Station. The station is powered by solar cells and batteries and equipped with connections to the satellite Internet service and wireless LAN. In this study, we conducted a communication experiment between the Autonomous Anti-disaster Base Station, located in University of Shizuoka, and other disaster prevention centers to enable the joint use of the station with other organizations and examined the feasibility of joint use covering the wide area. Also, in order to improve the connectivity when a large number of users access the Autonomous Anti-disaster Base Station with their smart devices via wireless LAN, we added a micro server to the station and further made an upgrade by changing the wireless LAN access point. Furthermore, to evaluate the improved Autonomous Anti-disaster Base Station, we conducted a demonstration experiment of the station in conjunction with the university's safety exercise. The experiment verified that the improvement made on the Autonomous Anti-disaster Base Station enabled a better access from users' smart devices via wireless LAN. © 2016 IEEE.
Suzuki Y.,Nippon Telegraph and Telephone |
Yamashita F.,Nippon Telegraph and Telephone |
Kobayashi K.,Nippon Telegraph and Telephone |
Takeda Y.,SKY Perfect JSAT Corporation
28th AIAA International Communications Satellite Systems Conference, ICSSC 2010 | Year: 2010
This paper presents a novel electrical polarization tracking method for mobile satellite communication systems that use linear polarization. It consists of two main technologies; the first estimates the mobile station antenna's relative polarization angle against that of the satellite's onboard antenna, the second forms counter polarization against the estimated value. We use a Ku-band communication satellite to evaluate the polarization tracking characteristics and BER performances. These results show that the proposed antenna offers the desired performances. © 2010 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Sky Perfect JSAT Corporation | Date: 2013-01-23
Ground stations 20, 21 receive any signal transmitted by a geostationary artificial satellite 10, and store the reception signal together with the reception time thereof. A difference t in reception time of a same signal between the ground station 20 and the ground station 21 is calculated by performing correlation processing of the reception signal of the ground station 20 and the reception signal of the ground station 21. A distance R20 between the ground station 20 and the geostationary artificial satellite 10 is measured by a distance measurement device. A distance R21 between the ground station 21 and the geostationary artificial satellite 10 is calculated on the basis of the distance R20 obtained by measurement and the difference t in reception times, as obtained by correlation processing.
Suematsu N.,Tohoku University |
Oguma H.,Toyama National College |
Eguchi S.,ISB Corporation |
Kameda S.,Tohoku University |
And 2 more authors.
European Microwave Week 2013, EuMW 2013 - Conference Proceedings; EuMC 2013: 43rd European Microwave Conference | Year: 2013
As a result of the great east Japan earthquake, terrestrial communication infrastructure was seriously damaged. Thus the importance of secure satellite communication measures based on very small aperture antenna terminal (VSAT) systems has been recognized. In order to satisfy the various demands for urgent life line recovery, we have started an R&D project of 'Satellite Communication Networks Valid for Disaster Recovery' as the next generation VSAT system. This project contains following three research topics. (1) multi-mode VSAT's based on software defined radio (SDR) technology, (2) low power consumption VSAT's and (3) emergency mode adaptive bandwidth control technique for HUB earth station. © 2013 European Microwave Association.
News Article | November 17, 2016
LUXEMBOURG--(BUSINESS WIRE)--Intelsat S.A. (NYSE: I), operator of the world’s first Globalized Network, powered by its leading satellite backbone, announced today that Marlink, the global business critical communication solutions specialist, signed an agreement for high-throughput connectivity from Intelsat’s Horizons 3e satellite. Horizons 3e, a joint venture satellite owned by Intelsat and SKY Perfect JSAT Corporation, will be stationed at 169° East to deliver connectivity in the Asia-Pacific
News Article | August 15, 2016
For the fourth time, aerospace company SpaceX successfully landed its reusable Falcon 9 rocket on a floating droneship Sunday, Aug. 14, just minutes after sending a Japanese satellite into orbit. The achievement marks the Southern Californian company's eighth launch in 2016 and its sixth overall recovered Falcon 9 rocket since it began employing the reusable craft two years ago. Sunday's landing wasn't a particularly easy feat. The Falcon 9 rocket's main goal was to carry the onboard satellite called JCSAT-16 into the geostationary transfer orbit (GTO). The GTO is a highly elliptical orbit that will take the JCSAT-16 about 36,000 kilometers or 22,300 miles out beyond the surface of Earth. Getting to the GTO would entail the use of greater speed and more fuel than before, more so than getting to the lower Earth orbit. This makes the rocket landing extremely difficult, because the rocket will experience extreme re-entry heating at high velocities during its descent to Earth, SpaceX said. Despite these circumstances, the company has successfully landed three Falcon 9 rockets that were bound for GTO on its floating droneships, aside from the recent landing. On Sunday, after a flawless launch from the Cape Canaveral Air Force Station in Florida, the Falcon 9 rocket's main stage separated about 3 minutes into the atmosphere. The rocket then performed several complicated maneuvers and engine burns to flip the first stage back to Earth. Approximately 6 minutes later, the booster settled on a barge — with the words "Of Course I Still Love You" on the surface — floating hundreds of miles offshore in the Atlantic Ocean. The JCSAT-16 satellite sent to the GTO is expected to provide more stable services for data transfer communications and video distribution in Asia, Oceania, Russia, North America and Middle East. It is the second JCSAT satellite that SpaceX lifted off in four months for the satellite operator SKY Perfect JSAT Corporation. SpaceX CEO Elon Musk aims to revolutionize the rocket launch industry by making rocket components reusable. Up until now, almost all rockets used in launches have been destroyed or unrecovered afterwards, making them expendable. But the hope is that SpaceX will be able to reduce a huge chunk of manufacturing costs by reusing these rockets. Gwynne Shotwell, president of SpaceX, says that reusing landed Falcon 9 rockets will result in a 30 percent reduction in launch costs. Meanwhile, the fact that SpaceX has already nailed eight successful launches and six successful landings is a sign that the company is speeding up its launch tempo, according to The Wall Street Journal. Seven more launches are listed through the end of December. The much anticipated initial launch of the company's Falcon Heavy may occur by the end of 2016. © 2016 Tech Times, All rights reserved. Do not reproduce without permission.
News Article | February 20, 2017
SINGAPORE--(BUSINESS WIRE)--Kacific Broadband Satellites Pte Ltd (Kacific) today announced that it has ordered its Kacific-1 satellite from The Boeing Company (Boeing) based on the 702 satellite platform. This condominium satellite will be shared with JCSAT-18, ordered by SKY Perfect JSAT Corporation. Kacific closed a US$147 million financing round in late 2016 with a mix of equity, debt and customer prepayments which covers the purchase of the satellite, launch service, ground systems and all other project costs. To secure this funding, Kacific has signed 15 managed bandwidth wholesale agreements in 14 different countries for a total value of US$434 million. Kacific-1 is designed to deliver uncontended broadband throughput via 57 Ka-band narrow beams, each having a capacity up to 1.25Gbps, with the highest signal power ever achieved in the region. The beams are selectively tailored to cover precise pockets of demand in a geographically dispersed footprint of 20 Pacific and South East Asian nations. Strategic positioning of the beams has enabled Kacific to sell capacity in 51 out of 57 beams so far, through take-or-pay contracts, with most beams exceeding 70 percent firm capacity bookings and several being almost saturated. Kacific selected the Boeing 702 because it is a reliable High Throughput Satellite platform delivering strong economics and a consistent high-quality connectivity across all service beams. “Boeing is pleased Kacific has chosen our flight-proven scalable 702 satellite for its next-generation broadband satellite service,” said Mark Spiwak, president of Boeing Satellite Systems International. “The capability and performance of the Boeing 702 satellite will enable Kacific to meet increasing demands for connectivity in the Asia-Pacific region, reaching new and underserved markets with reliable and cost-effective satellite internet services.” “We do pure play broadband. We focus on direct-to-premise. We precisely place capacity where it is most needed,” said Christian Patouraux, Kacific CEO. “This will yield price points that will unleash internet participation and usage. With the launch of Kacific-1, in 2019, people in areas currently lacking affordable high speed internet will be able to access online education, healthcare and public services, and grow their local economies. Delivering internet speeds over 100 Mbps on low cost, small form factor terminals, will help connect the dots of South East Asia and the Pacific to the digital world.”
News Article | December 22, 2016
PALO ALTO, CA, Dec. 22, 2016 /PRNewswire/ - Space Systems Loral (SSL), a leading provider of innovative satellites and spacecraft systems, today announced that the JCSAT-15 satellite, which it designed and built for SKY Perfect JSAT Corporation (SKY Perfect JSAT), was launched yesterday...