Deliverable 5.1: Software Interface Control Documents

This report discusses key aspects of the Sub-Array Controller (SAC), which performs software control and monitoring for the PfP test sub-array. The report places the SAC software into the context of the planned control system of the full EIESCAT_3D system. The EISCAT_3D radar control system will be comprised of approximately 100 stand-alone, identical SACs, orchestrated in star-like configuration by a top level EISCAT Real-time Operating System (EROS). The E3D EROS is a direct descendent of the EROS that is presently running all other EISCAT radars. The required high time resolution system-wide synchronization to sub-nanosecond accuracy is accomplished via the White Rabbit time-and-frequency system developed at CERN. A key software component of the control system is the EISCAT Shell module (ESH).

We are hiring

We are seeking new coworkers for the EISCAT_3D project. 

EISCAT_3D is a ground breaking, new incoherent scatter radar facility, that will be located in Finland, Norway and Sweden. 

Apart from the opportunity to work with an exciting project with all its challenges, we can offer you a flexibel work environment in the company of a great team. You will get to work with people from all over the world.

So if you are a Project Leader, Contract Leader, Senior Software Engineer or Senior Engineer, or possesses the qualities and experiences that we are seeking. Go ahead and apply!

You can read more about the vacancies at:

Or download the PDFs below. 

PDF icon Senior Engineer186.72 KB
PDF icon Contract Leader187.39 KB
PDF icon Project Leader188.59 KB
PDF icon Senior Software Engineer188.04 KB

EISCAT_3D, the new Arctic radar for space weather research gets go-ahead for construction

Press Release

EISCAT_3D, the new Arctic radar for space weather research gets go-ahead for construction

A new international research radar called EISCAT_3D was given the green light to proceed this month, promising a step-change in understanding the effect of solar storms and space weather on the upper atmosphere in the Arctic, including the magnificent Northern Lights. At a total cost of 685 million Swedish crowns, the EISCAT_3D facility will be distributed across three sites in Northern Scandinavia - in Skibotn, Norway, near Kiruna in Sweden, and near Kaaresuvanto in Finland. Each site will consist of about 10.000 antennas fed by a powerful 5 MW transmitter at Skibotn and a receiver at each of the three sites. The EISCAT_3D project will start in September 2017 with site preparations to begin in summer 2018. The radar is expected to be operational in 2021.

EISCAT_3D will be the world’s leading facility of its kind, offering a critically important window to the upper atmosphere and the near-Earth space in the European Arctic. The system will be built by the EISCAT Scientific Association, primarily comprising research councils and national institutes from Finland, Norway, Sweden, the United Kingdom, Japan and China, with additional members from several other countries. EISCAT_3D is the culmination of a 10-year design and preparation phase, supported by the European Union. The selected design is a sophisticated phased-array radar which brings together new capabilities never before combined in a single instrument. As the name suggests, a key capability is to measure a 3-D volume of the upper atmosphere, in unprecedented detail. This is necessary to understand how energetic particles and electrical currents from space affect both the upper and the lower atmosphere (e.g. space weather and auroral phenomena) as well as man-made technologies such as satellites and power grids on the ground.

Dr Craig Heinselman, EISCAT Director says,

“We are very excited to be starting construction of the new EISCAT_3D radar system. Building on over three and a half decades of scientific observations with the legacy EISCAT radars, this new multi-site phased-array radar will allow our international user community to investigate important questions about the physics of the near-Earth space environment. The radar will make measurements at least ten times faster and with ten times finer resolution than current systems. It will also provide fundamentally different measurements which are unique in the scientific world by utilizing, initially, fully flexible receive arrays at two separated locations in the Nordic region in concert with the core transmit/receive array. These systems will let us probe phenomena such as the aurora borealis in three dimensions and, in concert with a variety of other measurements, will allow us to uncover the fundamental effects of phenomena such as space weather. EISCAT_3D uses modern analog and digital technologies that enable flexibility now and a path forward for implementing new ideas that emerge from future discoveries. It truly represents a platform for the next generation of space scientists to build upon.”


Contact information:

Director Dr. Craig Heinselman, phone: +46 70 270 90 34, email:

Staff Scientist Dr. Anders Tjulin, phone +46 70 660 89 72, email:




Figure caption:

A schematic figure of the EISCAT_3D transmitter. Each of the 109 hexagons contains 91 antenna elements. The diameter of the area covered by one antenna field is about 80 m.

Figure caption:

Planned locations of EISCAT_3D stations: the transmitter-receiver in Skibotn Norway, and the two receive-only stations near Kiruna Sweden and near Kaaresuvanto Finland.


Background Notes:


The EISCAT Scientific Association,, provides state-of-the-art instrumentation to scientists in its associated countries for investigations into the upper atmosphere and ionosphere above northern Scandinavia. The EISCAT radars can be found in both mainland Norway, Finland, and Sweden and on Svalbard. EISCAT has supported scientific investigations since 1981 and continues to provide top quality instruments and data products to researchers from around the globe. Areas of specialization include quantifying the effects of Space Weather on Earth’s upper atmosphere, understanding the basic mechanisms of the formation and activity of the aurora borealis, and looking for long-term trends in the ionospheric response to effects on the sun and in the solar wind.

Contact info for EISCAT Scientific Association:

Director Craig Heinselman, phone: +46 70 270 9034, email:

Staff Scientist Dr. Anders Tjulin, phone +46 70 660 89 72, email:




PDF icon EISCAT_3D Press_release118.14 KB

Deliverable 4.1: First report on industry contracts

This report focuses on the progress of industry contracts for the procurement of production-ready designs and hardware of various sub-systems of the test sub-array. This test sub-array will be built and tested at the existing EISCAT site in Ramfjordmoen, Norway by the end of EISCAT3D_PfP project. This report discusses the progress of the procurement of the following sub-systems:

  • First Stage Receiver Unit (FSRU)
  • Antenna Unit (AU)
  • Pulse and Steering Control Unit (PSCU)
  • Time and Frequency Unit
  • Status and Control Unit
  • Cables, Connectors and Containers

Further, this report also includes information about the Transmit Unit (solid state power amplifier and power supply units) which will be delivered as an in-kind contribution from National Institute of Polar Research (NIPR), Japan.

Milestone 3: Contracts signed with vendors

Under EISCAT3D_PfP, the contracts for procurement of major sub-systems are signed.

The First Stage Receiver Unit (FSRU) contract was signed with National Instruments, Sweden on 2016-11-03 and the Antenna Unit (AU) contract was signed with Huber+Suhner Ltd, UK on 2016-12-13.

Thus, Milestone 3 in the EISCAT3D_PfP project was reached on 13 December 2016.

EISCAT_3D Frequently Asked Questions

  1. What is EISCAT_3D?
  2. Why “_3D”?
  3. What is a phased array?
  4. How large is each phased array?
  5. What kind of transmitter is used?
  6. Why so much power?
  7. Where does the power come from?
  8. Is it dangerous?
  9. Can I look at the data?
  10. Who pays for this research facility?
  11. Where will EISCAT_3D be located?
  12. Why these locations?
  13. What happens to the results?
  14. Can EISCAT_3D see other things, like airplanes and satellites?
  15. Does EISCAT_3D measure Space Weather?
  16. Where can I learn more about EISCAT and EISCAT_3D?



What is EISCAT_3D?
EISCAT_3D will be a radar system for the scientific study of the Earth’s atmosphere and ionosphere. It will use a technique called Incoherent Scatter Radar (ISR) to measure basic physical parameters of the ionospheric plasma and upper atmosphere near the Earth. This kind of system supports the study of phenomena such as the aurora borealis (northern lights) and noctilucent clouds.
Why “_3D”?
Using separate stations in Norway, Sweden, and Finland, based on phased array technology, EISCAT_3D will be able to make three-dimensional measurements of the plasma densities and temperatures and the direction of motion of that plasma, among other things. This will provide scientists a more comprehensive view of the important physical processes. These measurements are also frequently combined with other techniques (such as optical images, riometry, and modelling) to provide a deeper view of the plasma.
What is a phased array?
A phased array antenna is a set of simple antennas which, when combined, act as a much larger antenna. The EISCAT_3D phased array antennas will each consist of approximately 10,000 simple antennas. The signals from the antennas will be combined electronically, which allows the radar to be steered very rapidly over much of the sky. In fact, it will easily look in more than 1000 different directions each second, and 100 different directions at any given instant, if the scientists so wish.
How large is each phased array?
The 10,000 antennas at each site will cover an almost circular area of roughly 70 meters in diameter. The core transmit site (near Skibotn, Norway) will also host 10 smaller antenna arrays for more precise measurements. The larger arrays will be enclosed in 100 m × 100 m fenced areas to protect the system from unwanted visitors (such as moose). The sites will also have small buildings to house some of the sensitive electronics.
What kind of transmitter is used?
EISCAT_3D will use a distributed solid-state transmitter, with 1000 W peak power (up to 250 W average power) on each active antenna. The first stage of the construction of the EISCAT_3D system will have amplifiers on approximately 5000 of the antennas, yielding a peak power of 5 MW or an average power of up to 1.25 MW.
Why so much power?
The ISR technique bounces radio waves off of free electrons in the ionosphere. These electrons are extremely small and, as a result, high transmitter powers, large antennas, and sensitive receiver electronics are necessary to see any signal at all! Most of the transmitted signal passes right through the atmosphere and ionosphere and out into space, but the tiny bit that comes back tells us very much about the plasma!
Where does the power come from?
EISCAT_3D will be powered by electricity from the normal electric grid. A hydro-electric plant is located only a few kilometers from the planned core site in the Skibotn valley. UPS battery back-ups will protect the computers on the sites in case of power failures.
Is it dangerous?
No, the EISCAT_3D system is designed to protect both people and wildlife from exposure to high strength radio waves. There will be a metal fence around each array to protect the electronics and antennas from wildlife. Within the fenced area radio waves can be greater than international and local standards allow (which is why it is interlocked to turn off when maintenance personnel are inside the fence), but outside the fence the levels will be well below the allowed intensities. In fact, the system will use the fence itself to ensure that this is the case. Additionally, the system will be regularly tested by the relevant government agencies and by EISCAT to ensure that there is never a risk to people (or moose) that may stray close to the radar system.
Can I look at the data?
Plots of the measurements will be available for viewing on-line for the majority of experiments. For scientists to run their own experiments they must either be part of the EISCAT Scientific Association (through membership agreements between research councils and institutions) or by competing through a peer-review program. EISCAT only allows open scientific research programs to be run and operates solely in the civilian sector (no defence-related work is allowed).
Who pays for this research facility?
The EISCAT Scientific Association presently consists of six associate nations (China, Finland, Japan, Norway, Sweden, and the U.K.) and five affiliated institutes (from France, Russia, South Korea (2), and Ukraine). These associates and affiliates jointly fund the operation of the radars. The hardware and development were funded via contributions from the EISCAT Associates and the European Union.
Where will EISCAT_3D be located?
The first stage of the construction of EISCAT_3D involves sites near Skibotn (Norway), Kaiseniemi (Sweden), and Karesuvanto (Finland). Future stages include more sites.
Why these locations?
The location of the three radar sites form an almost equilateral triangle, which is a good geometry for the radar system to obtain data about the ionosphere. The transmitter site is also located in an area with relatively little cloud cover, which is helpful when combining the EISCAT_3D radar measurements with optical measurements of, for instance, the aurora borealis.
What happens to the results?
The analysis and results obtained from the measurements are typically published in a variety of peer-reviewed scientific journals. The very large ‘raw’ data files remain the property of EISCAT, but the scientific results are provided to everyone with internet access.
Can EISCAT_3D see other things, like airplanes and satellites?
Yes, to some extent. However, the EISCAT_3D transmit array will be placed in a valley to limit the number of aircraft in its field of view. This is done because reflections from these objects are too strong and will hide the scientific data the system is interested in receiving. Satellites are a particular problem because they travel through the region of space that the radar is primarily interested in, so the reflections from satellites must be carefully removed. The system will also be able to see micro-meteors, which come from sand grain sized particles that fall into the top of the atmosphere all the time. This is another area of study by the EISCAT scientists.
Does EISCAT_3D measure Space Weather?
The term space weather refers to studies of how activity on the Sun and in the solar wind affects the space environment near the Earth. EISCAT_3D scientists will work on the research to understand how space weather comes about by making precise measurements of how the solar wind influences an important part of the near-Earth space environment (the auroral zone). It will be less useful for operational predictions of space weather events because those predictions require measurements closer to the sun.
Where can I learn more about EISCAT and EISCAT_3D?
The website of EISCAT Scientific Association ( contains information about the association and the radar systems. The EISCAT_3D website ( is focused on the EISCAT_3D project.