Nigeria's space program has passed another milestone as both the state of the art NigeriaSat-2 and the Nigerian-built NigeriaSat-X (NX) spacecraft passed their Flight Readiness Reviews.

The completion of this review signifies that the two spacecraft are now ready for launch. At the same time, the Launch Services Agreement was signed that will see the two spacecraft launched onboard a Dnepr rocket in Q4 2010.

Meanwhile, the 26 Nigerian trainees, some of who have spent 3 years at SSTL, have now returned to Nigeria ready to begin operations of their two spacecraft once they launch next year.

In March 2007, SSTL announced that it had signed an order with Federal State Unitary Enterprise - The Russian Research and Production Enterprise Pan-Russian Research Institute for Electromechanics (FSUE NPP VNIIEM) and Radioexport of Russia for the supply for the supply of satellite platform equipment and services for the KANOPUS Low Earth Orbit (LEO) Earth observation spacecraft.

The first satellite, KANOPUS-B will monitor the Earth's surface and support the monitoring of disasters, agricultural planning and the management of water and coastal resources.

The project was to be a highly cooperative effort from the beginning, with great admiration on both sides of the project. The cooperation has also been different in the nature of its deliverables, and for technical, cultural reasons.

First of all, let’s look into the project itself. SSTL is a small satellite manufacturer, that regularly builds and integrates fully-functioning satellites like the recently launched UK-DMC2 or Deimos-1 earth observation missions. It also supplies sub-systems such as high resolution earth imaging payloads, multi-spectral imagers, on-board computers or GPS receivers for third party missions.

For the KANOPUS-B contract, a new approach was adopted where SSTL would build the satellite platform, avionics equipment and software, but then support VNIIEM with their spacecraft assembly and payload integration activities in Russia.

Integration – the moment of truth

During May and June, teams from SSTL visited VNIIEM’s impressive Assembly, integration and test (AIT) facilities in Moscow.

AIT Engineer Rob Gibbings and manufacturing engineer Greg Rouse can be seen to the left cutting a wiring harness to the required length and attaching customer connectors onto the SSTL harness.

More recently, in August, a team from SSTL visited the VNIIEM AIT facilities in Moscow to connect the SSTL equipment with the rest of the satellite equipment, perform tests on hardware and perform initial integration checks before satellite integration.

In the photo Lead AIT engineer Ari Venkatesan is connecting the VNIIEM Solar Array Simulator (SAS) to the SSTL power system, which was one of the integration checks performed.

During the visit in August, SSTL successfully integrated the VNIIEM SAS.

SSTL provided power and pulse-per-second [satellite timing information] to the Mission Hardware (Payload) through our systems, and achieved communication between the SSTL on-board computer and the Mission Hardware over the MIL-1553 data bus.

One of the major technical differences was the Russian’s use of a MIL-1553 data bus, and the compatibility of the SSTL built systems with this.

SSTL’s heritage systems use a CAN (control area network) bus for robust on-board communications between subsystems. VNIIEM wanted SSTL’s CAN-based systems to be able to “talk” to the 1553 bus systems reliably and with no loss of information. This has been achieved by using the OBC (On-Board Computer) as the interface between the SSTL CAN data bus and the VNIIEM MIL-1553 data bus. The OBC in effect performs the translation from MIL-1553 data into CAN data and vice-versa.

The SSTL on-board computer is also using newly developed flight software for this mission. Building the software from the new operating system upwards and accommodating the new and different payload interfaces and modes of operation to what SSTL is accustomed to is no small task. This newly developed software successfully established communications with the Mission Hardware during the testing in Moscow. Further testing is required, but this first step went a long way to build confidence in both teams.

The culture of engineering

Yes, you heard right. Culture and engineering in the same sentence.

The two companies have a very different engineering culture. SSTL has made a name for itself by changing the economics of space – a feat made possible by adopting Commercial Off The Shelf (COTS) technology and applying it to space systems.

Its heritage is built on a “systems engineering” approach which takes advantage of new technologies and tight integration. For example, one of the reasons that SSTL can provide such fast turnaround for missions is that their “off the shelf” platforms comprise tightly integrated subsystems for telemetry, navigation, mission planning and attitude control.

The culture of engineering in Russia is quite different. This is largely because SSTL’s Russian counterparts are more familiar with building larger satellites with stringent specifications and reliability requirements.

SSTL, on the other hand builds complete systems that are integrated with software and (re)programmable electronics. The modules are physically separate and can be tested separately, but the customer benefits from advanced functionality and a more robust system within a lower total cost of ownership (TCO) when the system is treated as a whole.

Project Manager, Alex O’Neill explained,

“The design process is also different. Whereas we would design and allow for margins of error, the Russian approach is more focussed on eliminating errors through thorough, precise and comprehensive analysis and design choices.”

“This meant that our initial meetings could stop and start, with both ourselves and the VNIIEM engineers having different expectations.”

SSTL is a dynamic young company that attracts talented young scientists and engineers, as such the average age of the core team dedicated to the VNIIEM project is 33, even experts in a particular field may not be much older.

Alex O’Neill reflects,

“In the beginning, the age difference was very noticeable. We felt that we were perhaps treated with some fair scepticism by the more mature and very experienced and capable Russian engineers. Initially, our ideas were also difficult for these experienced space veterans to fully appreciate, but I am pleased to say that a strong mutual respect has been earned by both sides."

It is believed that the KANOPUS satellites will be launched either at the end of 2009 and early 2010, and SSTL looks forward to a long a fruitful relationship with VNIIEM in the future.

Nigeria's NigeriaSat-2 and NX earth observation satellites are undergoing tests at the Science and Technology Facilities Council’s (STFC’s) Rutherford Appleton Laboratory.

NigeriaSat-2 and NX are being built for Nigeria's National Space Research and Development Agency (NASRDA) and will form part of the Disaster Monitoring Constellation (DMC) when they are launched next year.

NigeriaSat-2 was designed and built by Surrey Satellite Technology Limited (SSTL), and is based on their latest SSTL-300 earth observation satellite platform will deliver a high-resolution (2.5 metre) imaging system onboard a highly agile platform.

NX, which is based on the SSTL-100 platform was built by Nigerian engineers as part of their training and development scheme at SSTL in Guildford, UK. It will provide 22-metre imaging, enhancing the capability that is currently provided by NigeriaSat-1, which was launched in 2003. These latest satellites will provide not only continuity to Nigeria’s current space capability, but significantly advance the country’s space assets.

Continue reading "Nigerian satellites tested at RAL"

In the first quarter of the New Year, a SSTL satellite will be launched. This time around it carries more than just a payload, it will contribute to charity.

Surrey Satellite Technology Limited showed that their satellite technology is not only beneficial for longer-term natural disaster monitoring; it also benefits the local community. When the new Surrey built UKDMC-2 satellite joins a group of six SSTL satellites in March in order to monitor and record natural disasters such as tsunamis, earth quakes, volcanic activity and flooding, it will also be carrying a message of benevolence.

Whilst building the spacecraft that is worth more than £5million, Dr Matt Perkins, Chief Executive of SSTL, came up with the idea of running a competition which would benefit a local charity. The winner of the competition would have the once in a lifetime opportunity to have their name or company logo printed alongside the satellite.

Galaxy Cars, a mini-cab company from Woking, won the competition by donating £8000 to Phyllis Tuckwell, a dedicated Hospice in Farnham that provides care to more than 100 people every day. Phyllis Tuckwell will also have their name printed on the space capsule.

Dr Perkins explained that he wanted to help the local community as SSTL’s work has a certain reach, which could be capitalised to promote charitable projects:

I was touched by what I heard about Phyllis Tuckwell and so we took the opportunity to raise funds for them and put their name into space

Sarah Brocklebank, Chief Executive of Phyllis Tuckwell Hospice, said:

I was delighted with the contribution and the opportunity of having the charity name floating in orbit.

Mohammad Zubair, owner of Galaxy Cars, stated:

We think this is a great opportunity to put something back into the community.

The new satellite is the latest edition to SSTL’s space portfolio and will join a team of six devices that are already in orbit, one of which has been going more than five years (Alsat-1).