Tag Archives: Deep Space Network

Contact re-established with dead solar satellite

Good news! After almost two years since contact was lost, NASA has re-established communications with Stereo-B, one of two solar research satellites designed to study the hemisphere of the Sun that does not face the Earth.

NASA re-established contact with a wayward sun-watching science satellite Sunday nearly two years after the spacecraft suddenly dropped off line during a test, the agency said in a statement Monday. NASA’s Deep Space Network, or DSN, “established a lock on the STEREO-B (spacecraft’s) downlink carrier at 6:27 p.m. EDT,” NASA said in a statement. “The downlink signal was monitored by the Mission Operations team over several hours to characterize the attitude of the spacecraft and then transmitter high voltage was powered down to save battery power. “The STEREO Missions Operations team plans further recovery processes to assess observatory health, re-establish attitude control and evaluate all subsystems and instruments.”

This is a big deal. Not only is it a testament to the spacecraft’s good design, it demonstrates the skill of the engineers at NASA who have regained contact.

Privately built smallsat designed deep space communications

The competition heats up: A partnership between two British space companies, a smallsat manufacturer and a space antenna operator, will team up to build and test a new smallsat communications satellite in lunar orbit.

The SSTL-GES Lunar Pathfinder team are already working on the initial baseline design, with technical assistance from the European Space Agency (ESA). SSTL are designing a series of lunar communication satellites and will be building on their heritage of small satellite platforms in Low Earth orbit and Medium Earth orbit to go beyond Earth’s orbit for the first time. GES are upgrading one of the famous antennas at their Goonhilly site in Cornwall, UK, into a deep space ground asset, which will be the first element in a commercial deep space network. In addition, GES will provide a dedicated mission operations centre situated in Cornwall.

What is interesting about this is that this is a private effort to develop a modern commercial deep space communications network for future planetary missions. It would be competitive with NASA’s Deep Space Network, which presently is the only game in town and is generally made up of upgraded 1960s based technology. This new network would also eventually include a dedicated network of smallsats scattered through the solar system to act as communications relays. This is something that NASA does not provide, depending instead on the communications instruments of the planetary missions themselves.

NASA and JPL have now stated that the government shutdown will not interfere with their promised support for India’s Mars Orbiter Mission.

NASA and JPL have now stated that the government shutdown will not interfere with their promised support for India’s Mars Orbiter Mission.

Earlier reports had suggested that NASA’s Deep Space Network, used to communicate with planetary probes, would not be available because of the shutdown, and the mission would have to be delayed because of this.

Posted from Columbia, Maryland.

Because India depends on the American Deep Space communications network — mostly unavailable due to the government shutdown — the launch of its first Mars probe, set for October 28, might have to be delayed for two years.

Because India depends on the American Deep Space communications network — mostly unavailable due to the government shutdown — the launch of its first Mars probe, set for October 28, might have to be delayed for two years.

This is unfortunate news indeed. However, if I was India (as well as other countries) I would consider this a call to develop their own deep space network.

Impressive radar images of near-Earth asteroid 2007 PA8 were taken during its recent fly-by of Earth.

Impressive radar images of near-Earth asteroid 2007 PA8 were taken during its recent fly-by of Earth.

The images … reveal possible craters, boulders, an irregular, asymmetric shape, and very slow rotation. The asteroid measures approximately one mile wide (about 1.6 kilometers).

The asteroid poses no threat to Earth. The resolution of the images, however, is astonishing, especially considering it was done by radar.