The satellites that the U.S. Department of Defense relies on for communications often each have their own ground control systems that are designed to work with specific families spacecraft. But as space becomes more a more contested, with enemies looking to undermine the United States’ information advantage, that set up can lead to problems on the battlefield.
“Today if they lose communications because of adversarial jamming, they may have to cancel their mission,” said Frank Backes, senior vice president of federal satellite Solutions at national security solutions provider Kratos. “If they depend on satellite communications to do their mission, they will be basically stuck.”
Under a program sponsored by the Air Force’s Space and Missile Systems Center, subsidiary Kratos RT Logic recently demonstrated a potential fix. The company unveiled a solution that would allow users to roam among multiple satellites and systems in much the same way the cellphones roam when they are deprived of a signal.
The prototype, known as Enterprise Management and Control (M&C), aims to make defense communications more robust by offering diverse pathways and enhanced bandwidth efficiency.
The need for roaming satellite communication connectivity comes from an evolving military landscape.
“When the present satellite communications infrastructure was set up, military communications weren’t operating in a hostile communications environment. Today that has fundamentally changed,” Backes said. “When Army or Navy is operating in theater, they run into jamming as well as unintentional interference.”
When that happens, it is possible to reconfigure the network, to switch to another satellite, but it can literally take weeks or even months to make the change. The new initiative seeks to allow soldiers to recover comms on the fly, without having to swap out equipment or reconfigure their connections.
Kratos demonstrated the capability using existing legacy terminals. “It’s primarily a software modification,” Backes said. “A lot of the solutions that have been considered would have required changing out all the ground terminals. We worked directly with DISA and with Space and Missile Systems Center in Los Angeles so that we would not require the replacement of those legacy systems. That makes it dramatically less expensive.”
Government has long recognized the need for such a capability. “Satellites, ground control systems, and user terminals in most of the Defense Department’s major space system acquisitions are not optimally aligned, leading to underutilized satellites and limited capability provided to the war fighter,” the GAO noted in a 2009 report. The issue has been a long-running theme for the Congressional watchdog since then.
“When capabilities are delayed because of lack of alignment between satellite and ground control systems or user terminals, the war fighter may develop short-term solutions, often at diminished capability and added cost,” GAO reported.
The emerging system is designed to work with standard commercial communications satellites as well as with the military’s Wideband Global SATCOM (WGS) constellation. It aims to achieve a number of specific ends including:
- Giving operators rapid, automated access to multiple satellites and satellite networks, from multiple service providers
- Allowing control of multiple modem types and software versions from within a single terminal
- Enabling terminal reconfiguration to support diverse SATCOM architectures, including Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) networks.
The emerging system aims to do more than just restore comms when the link fizzles out. A diagnostic capability helps the system to understand why the network has gone down, which in turn enables the roaming function to take the next needed step.
“You need to be able to make the determination not just when to roam but also why,” Backes said. By understanding the cause of a network failure, “the system can then make a determination as to what satellite system might be a better choice under those circumstances, so that it would not be interfered with.”
Engineers took an open-architecture approach to designing the new interface. In addition to allowing roaming among disparate systems, this approach also could enable a rapid acquisition path, should battlefield communication needs change rapidly. “That frees the government to lease from multiple commercial companies, to set up new leases and to immediately start using those out in the field,” Backes said. “It allows the government to very quickly adjust and deploy.”
Looking ahead, Kratos executives say they hope to see a 2019 contract award for additional testing to prove operational capability. As part of that effort, engineers will push for less human intervention in the roaming capability.
“With thousands of terminals out in the field, the goal is to have it make the move on its own. The next phase of proving out this system would be to show that capacity for an automated change. That’s what make it true roaming. You don’t tell it when to switch networks. It just does it on its own,” Backes said.
1.957 aktive Satelliten kreisen derzeit der Union of Concerned Scientists zufolge um die Erde – davon gehören die meisten den USA.
Auf Platz zwei liegt China mit 284 künstlichen Erdtrabanten. Insgesamt verfügen weltweit 70 Länder über zumindest einen Satelliten. Die häufigsten Verwendungszwecke sind laut Satellite Industry Association Kommunikation (privatwirtschaftlich und staatlich), Erdbeobachtung sowie Forschung und Entwicklung
Fast 20.000 so genannte erdnahe Objekte sind derzeit laut Center for Near Earth Object Studies bekannt.
Das sind Asteroiden und Kometen, die bei ihrem Umlauf um die Sonne die Erdbahn kreuzen und deshalb eine Kollisionsgefahr bergen. Darunter befinden sich fast 2.000 potentiell gefährliche Asteroiden, von denen 155 einen Durchmesser von einem Kilometer oder mehr haben. Der Einschlag eines solchen Giganten wäre eine ernsthafte Gefahr für den Fortbestand der Menschheit. Schon deutlich kleinere Brocken bergen ein enormes Zerstörungspotential. So explodierte im Dezember laut Nasa ein auf 1400-Tonnen und zehn Meter Durchmesser geschätzter Meteoroid über der Beringsee mit der Wucht von zehn Hiroshima-Atombomben (173.000 Tonnen TNT).