nasa
RSS nasaUsing NASA's World Wind Component in Your Java Technology Applications
White Paper World Wind is open-source software, developed by the National Aeronautics and Space Administration (NASA) that allows the user to zoom from satellite altitude into any place on earth. Leveraging Landsat satellite imagery and Shuttle Radar... [29 Mar 2008]
Caption Competition: Space truckin'
Photo Photo credit: Nasa This competition is now closed. The winning caption from reader Lee was: "MTV release a trailer for their new series 'Pimp my Space Wagon'". [29 Feb 2008]
Satellite comms to bridge digital divide?
News Satellite tech has been in the spotlight recently following reports Nasa is developing a satellite-based system to put a mobile phone network on the moon. The UN agency for information and communications issues is looking to the heavens to bridge... [28 Feb 2008]
Photos: Android, high-tech Heathrow, the future of shopping
Photo Nasa and the British National Space Centre intend to test a system to serve a lunar base planned for 2020. Photo credit: Natasha Lomas Hundreds of bags wait to be loaded into the high tech baggage system at Heathrow's brand new Terminal 5. [28 Feb 2008]
Mobiles on the moon, Google Android, Facebook fall
News Spring is almost in the air but something else taking off this month was news Nasa is planning to build a mobile phone network on the moon. Clearly current levels of demand for mobile coverage on the big green cheese-wheel in the sky are not... [28 Feb 2008]
Photos: Lunar mobile phones preparing to soar
Photo In space no one can hear your ringtone - something that could be a blessing from 2012 when Nasa and the British National Space Centre (BNSC) trial a mobile phone network on the moon. The joint Nasa/BNSC MoonLite mission, due to be launched after... [25 Feb 2008]
The Weekly Round-Up: 22.02.08
Round-Up Anyway, the moon it is and the satellite system should ensure a full five-bar signal for lunar colonists living in the base Nasa wants to build at the south pole of the desolate, dusty rock. Nasa and the British National Space Centre are preparing... [22 Feb 2008]
Mobiles on the moon? Nasa prepares trial for takeoff
News Even in the cosmos there will be no escaping the ringtone as Nasa and the British National Space Centre (BNSC) prepare to trial a mobile phone network for the moon. The satellite system should ensure a full four-bar signal for lunar colonists... [19 Feb 2008]
SCPS-TP, TCP, and Rate-Based Protocol Evaluation
White Paper Tests were performed at Glenn Research Center (GRC) to validate the operation of Space Communications Protocol Suite-Transport Protocol (SCPS-TP) relative to the Consultative Committee on Space Data Systems (CCSDS) specification, to perform a... [15 Jan 2008]
TCP Behavior in Networks With Dynamic Propagation Delay
White Paper This paper provides a preliminary investigation into the impact a link with changing propagation delay has on the performance of TCP file transfers. The paper investigates over a dozen different variable delay patterns, based on spacecraft movement. [15 Jan 2008]
ATM QoS Experiments Using TCP Applications: Performance of TCP/IP Over ATM in a Variety of Errored Links
White Paper Asynchronous Transfer Mode (ATM) Quality of Service (QoS) experiments using the Transmission Control Protocol / Internet Protocol (TCP/IP) were performed for various link delays. The link delay was set to emulate a Wide Area Network (WAN) and a... [15 Jan 2008]
SCPS-TP, TCP and Rate-Based Protocol Evaluation for High Delay, Error Prone Links
White Paper This paper describes testing performed to validate operation of Space Communications Protocol Suite Transport Protocol (SCPS-TP) relative to the specification and perform a comprehensive comparison of SCPS-TP protocol options to IP based protocols. [15 Jan 2008]
On the Performance of TCP Spoofing in Satellite Networks
White Paper This paper analyzes the performance of TCP in a network that consists of both satellite and terrestrial components. One method, proposed by outside research, to improve the performance of data transfers over satellites is to use a performance... [15 Jan 2008]
Simulation of TCP for Orbiting Spacecraft Through the TDRS Satellite System
White Paper NASA engineers have designed an interface system that connects the Space Shuttle and Space Station communication system to the Internet on Earth. Such a system allows for the astronauts to use services like the World Wide Web and Electronic Mail. [15 Jan 2008]
TCP Byte Counting Refinements
White Paper TCP's delayed acknowledgment algorithm has been shown to hurt TCP performance. One method of gaining the performance lost by reducing the number of acknowledgments sent is to use a limited byte counting algorithm. [15 Jan 2008]
