RWIS

The ultimate weather system for roads and runways

SARSYS-ASFT’s RWIS, Road/Runway Weather Information System, is a complete and computerized technology for weather and surface condition assessment developed to increase safety, reduce costs for maintenance and lower environmental impact. The system is designed for a global market and specialized for regions where weather typically changes with the seasons. RWIS connects to SARSYS-ASFT’s software MIDAS, together they also facilitate the process of filling out the GRF.

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How does RWIS work?

Safety is the primary objective for airports and runways all over the world. In this context, and in any other, weather is a major, unpredictable variable. Heavy winds, rain, snow, hail, ice and poor visibility make weather management a key component for any runway operator. 

RWIS is your surveillance system that uses sensors and subsystems to monitor and send out early warning signals before conditions become critical. 

The computerized weather system of RWIS consists of sensors, fixed stations and dataloggers that communicate with interface MIDAS. Embedded sensors detect surface temperature, surface freezing point, and type and depth of contamination. Fixed weather stations collect data on air temperature, wind direction, humidity and gives a visual image. The camera adds a dimension making it possible to see the precipitation in real time. Dataloggers compile all data into the back-end server before it reaches the operator via MIDAS.


Exact numbers mean exact decision making, and saving money

Why guess when we can know for sure? Monitoring critical areas can give us all the information we need to make rapid decisions in the perfect intersection of high safety, low costs and low environmental impact. This information is provided automatically by the RWIS. RWIS gives us early warning signals that save time, money and environmental impact when de-icing and snow removal is precisely targeted, more effective and less wasteful. 


Reduced costs for maintenance

For larger airports, costs for de-icing could be cut in half. With more precise data the operator can apply the exact amount de-icing, not less and not more, to achieve perfect road or runway conditions. With de-icing in frosty regions typically being a costly, but highly necessary routine, a well-functioning system to help regulate the amount of deicing and avoid excessive application, costs for daily maintenance are easily reduced. 


Return of investment within 2 years

Depending on how much de-icing your airport is currently using, an investment in SARSYS-ASFT’s RWIS can easily be returned in form of reduced expenses within a period of just two years from implementation. This would mean, installing RWIS is an initial investment, but after two years you now have a system that have not only paid for itself, but will continue keeping your maintenance costs low. 


In line with the GRF

RWIS and runway assessment platform MIDAS are designed to compile weather and contamination data to accumulate an updated overview of current road and runway conditions. The systems are also designed to assess data needed to fill out the new Global Reporting Format, the GRF. If desired, this process can easily be made automated with RWIS and our app-based runway assessment software SNAp 2.0. With RWIS, weather data assessment is taken care of and presented to you as a full and firm information on the precise condition of your road or runway. RWIS gives you on the minute updates on the current condition but also calculates trends to help operators meet the best decision right now as well as preparing them for what is to come in the next few hours. 


Models designed for runway operators result in better forecasts

RWIS is not your typical weather station. It is a full-service system specifically designed to suit data assessment meant for runway operators. The system compiles weather data with runway condition data, giving the operator input based on what decisions the data is meant to facilitate. Designing models with a clear picture of what the operator needs, results in better local weather forecasts which consequently gives us better readiness.


Safer runways

When data are plentiful and numbers more precise, we have what conditions we need to increase safety – if we can interpret and translate the numbers into task-oriented tools. RWIS compiles data from different sensors and communicates them to MIDAS. The user-friendly interface of MIDAS presents the data to the operator who then can meet the best possible decisions. This constant up to date readiness is key for any operator to guarantee runway safety. 

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Increased effectivity in winter-maintenance

Task-oriented data provides measures to increase effectivity in all aspects of winter-maintenance. Automatic weather data processing means fewer detours. With fewer detours we can lower the risks for mishaps, we can achieve faster compilation of updated data and expect more precise suggestions on where and how much de-icing should be applied. 


Less dependent on specific operators

When we apply only the exact amount of de-icing, we also do our surrounding environment a great favor. With just as much dosage as necessary to maintain and optimize safety, no unnecessary chemicals or substances reaches the ground surrounding the road or runway. Add to that, fewer transports during deliveries and application. The more precise we can be, the more the environment will thank us. 


Open systems for flexibility and scalability

SARSYS-ASFT offers complete solutions and systems for monitoring and forecasting weather-, surface- and runway conditions. To enhance safety, we take care of everything from planning and thermal mapping to implementation and integration. We built RWIS to be the most flexible system on the market, therefore it is open and can be integrated with any other system. We designed it to easily scale up once you need more sensors or another type of sensor. A complete system is of course to prefer in terms of enhancing safety and experience increased efficiency, but RWIS makes it perfectly possible for you to start small and grow in your own pace.

How is it implemented?

The scalability and flexibility of RWIS is designed for an easy start and short implementation phase. Our open system design and versatile platforms give you unlimited integration and future development by being compatible with all existing system. Preferably the installation is performed in the spring, when seasonal maintenance and resurfacing is typically executed. Within four months from ordering your RWIS, the system can be delivered to your location and installed by a local professional contractor.

Why RWIS when I have AWOS?

AWOS is a system made for measuring and monitoring atmospheric weather for Air Traffic Control. A well working system, for the purpose it was meant to fulfil. RWIS, on the other hand, processes weather data and runway condition data, presenting them to the operator via MIDAS. RWIS is designed to compile weather data in the form, quality and quantity that operators specifically require to meet the right decisions to ensure safety on the runway. All parts of the system are developed based on the needs and wishes from winter OPS personnel to help simplify and make their work more efficient in terms of time and safety. AWOS is good for what AWOS is good for, but when assessing runway conditions, RWIS outshines it in every way.

Components of the RWIS

SARSYS-ASFT’s systems have been operational for more than 30 years, and have proven to be remarkably reliable, with low maintenance requirements. The four main components in the RWIS are embedded sensors, RWIS Station, the user interface MIDAS and dataloggers. The scalability of RWIS makes is possible to tailor your system to including additional components and subsystems.

Embedded sensor Frensor® and Surface State Sensors

Frensor® is a patented solution for an exact detection of the freezing point temperature on roads and runways. This specific sensor actively heats and cools fluid to determine the exact freezing point on roads and runways. Frensor® is independent of any de-icing chemical used.

Surface State Sensors detects and classifies the contamination (snow, ice, slush, standing water, etc) and also its depth on the surface.

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RWIS Station and the Optic Eye

The Optic Eye is a sophisticated precipitation sensor. It measures precipitation intensity and classifies the type of precipitation: rain, snow, sleet and drifting snow. The Optic Eye is typically integrated with the fixed weather station of RWIS.

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User interface MIDAS

Multi Information Data Assessment System, MIDAS, is the collaborative runway assessment platform that processes vast amounts and various types of input and presents them via a user-friendly interface. Collected data is visualized and can be monitored in several task-oriented views: graphs, tables and maps. All data can be monitored in real time or be brought forth retrospectively. 

More on MIDAS