Flight controllers in Houston were updating software on the ISS when one of its data relay systems broke down.
BBC: Nasa back in contact with the International Space Station
In April, China launched its first tracking data relay satellite to lessen its dependency on ground satellite control and relay stations.
Both spacecraft make use of the US space agency's Tracking and Data Relay Satellite System (TDRSS) to speak to the ground and controllers do not want any conflicts.
The data are sent from the orbiting outpost to NASA's Tracking and Data Relay Satellites, which relay it to the satellite reception dishes at NASA's White Sands Test Facility in New Mexico.
ENGADGET: AMS detects excess of positrons, could suggest existence of dark matter
The primary computer that controls critical station functions defaulted to a backup computer, but it was not letting the station communicate with Nasa's Tracking and Data Relay Satellites, the US space agency said.
BBC: Nasa back in contact with the International Space Station
These devices should just relay data rather than changing it and the argument against having intermediary nodes doing things like modifying web pages is that this can, at the least, introduce performance and reliability problems.
The dish would send the ISP's data up to one of the satellites (in low earth orbits to minimize signal delay), which would then relay the data back down to a backbone access point.
Focusing the scope on individual consumers, the analyst cites data from Wal-Mart, which, given its capacity to relay real time data, allows the retail giant to offer guidance on what and, importantly, when consumers are buying.
FORBES: No Recovery Possible While U.S. Consumer Continues Deleveraging
Then, it would pump out the water, float back to the top and relay its data back to the scientists via a satellite network.
On Day 44 of the trek, both a radar device meant to measure the ice thickness and a satellite communications unit to relay the data are still not working - despite being brought back to the UK for repairs and then delivered to the team last week.
The phone, Haven says, is the platform that combines these three streams: it gets input from and monitors its user, is embedded in the mesh of the Internet, and can relay massive amounts of data that could be the basis for useful algorithms.
FORBES: Are You Happy? An App Tries To Raise Our Collective Mood
Unlike a smartphone, a watch is always in direct contact with the skin, which means it can relay a unique set of data on body functions.
FORBES: On Second Thought, Maybe That Apple iWatch Will Be A Timely Product After All
Since the primary waves travel more quickly than the comparatively sluggish secondary waves, the system picks up on the magnitude and speed at which the quake is approaching, and beams the data over fiber optic networks to emergency relay stations setup in corporate towers, governmental buildings, hospitals, and transportation venues such as railways.
ENGADGET: Japan Meteorological Agency develops earthquake warning system
Corporate customers have installed some 40, 000 BlackBerry servers, which synchronize and relay e-mail and let data-processingdepartments remotely zap all the data from lost or stolen BlackBerrys.
These transmit data to buoys on the surface, which in turn relay the information to NOAA by satellite.
On February 28th and March 1st, American missiles blew up radio relay stations near Mosul in the north that transmit operational data for Iraq's main oil pipeline.
In Europe, the backbone of this data stream is provided by Metosats 8 and 9 which sit high above Africa and relay pictures of the developing systems coming our way.
应用推荐