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ROC Systems Engineering provides technical consulting services on NEXRAD network, computer systems, and telecommunications equipment. Systems Engineering is also responsible for WSR-88D security implementations. Systems Engineering also provides the following services to WSR-88D system users:

  • Development, review, and recommendations on all Engineering Change Proposals (ECPs), Time Compliance Technical Orders (TCTOs), Configuration Change Requests (CCRs), Modifications, and computer design changes.

  • Support for field operations.

  • Review of radar performance data and recommendations for observed problems in systems reliability.

  • Requirements analysis, feasibility studies and cost analysis for problem resolution.

  • Implementation of change requests involving computer, telecommunications systems and data storage.

  • Management of test programs for data distribution and storage systems.

News & Information:


  • Enterprise Infrastructure Solutions (EIS) Transition Program
    The EIS contract is the main component of GSA’s telecommunications portfolio for NOAA. EIS is replacing GSA’s current Networx Universal and Enterprise contracts as well as GSA Regional Local Service Agreements for government telecommunications and infrastructure solutions. The EIS contract has a 15-year period of performance (one 5 year base and two 5 year options) and encompasses all WSR-88D, SPG and NPN telecommunications services.

    The current GSA Networx contract, for which most NEXRAD circuits and backup communications systems subscribe for service, expires 31 May 2023.  Service provider changes may force hardware, software, and configuration changes within a very short period of time.  New hub routers with PIP/BGP service will be deployed with EIS transition.  RPG and RDA routers have spare ports allocated for EIS.

  • Radar Signal Processor (RSP) Refresh
    The current RSP has internal components that are end of life, end of support.  This means that the RSP cannot be expanded to accommodate future needs.  The RSP is a rack mounted PC hardware assembly that is used to perform clutter filtering, velocity de-aliasing, range de-aliasing, and antenna, radar, BITE control/monitoring features.  The refreshed RSP is expected to deploy in the calendar year 2023.

  • Security
    For the WSR-88D, TDWR SPG and NPN systems, the ROC has implemented the Risk Management Framework (RMF), as defined by NIST Special Publication (SP) 800-37 Revision 2: “Risk Management Framework for Information Systems and Organizations''. The framework provides a dynamic approach which leverages robust continuous monitoring to support on-going authorization and risk management as part of a more steady state, less cyclical process for each of the systems. Continuous monitoring results are reaffirmed, and risks are reassessed, documented, and accepted at least annually by each system's Authorizing Official (AO) and Co-AO, to ensure continued Authority to Operate (ATO). The reauthorization of the ATOs for the WSR-88D, TDWR SPG and NPN are documented in writing via signed Re-authorization Memos, and are entered in the DOC Cyber Security Assessment and Management System (CSAM) annually.

  • Redundancy For Commercial T1 Service Between Remove Radars and NWS WFOs
    Backup  communications systems to remote radars have increased the remote radar data availability and have  mitigated loss of radar data over existing aged terrestrial circuits, especially during and after significant weather events. Remote NEXRAD NWS, FAA and DoD radars are geographically separated from their hosting National Weather Service (NWS) Weather Forecast Offices (WFOs). The current backup communications methods are  cellular 4G Long Term Evolution (LTE) technology, and satellite Very Small Aperture Terminals (VSATs) at sites that cannot achieve adequate 4G LTE signal strength. The NEXRAD router configurations and auto fail-over mechanisms for 4G backup systems are the same as for VSAT backup systems, such that either 4G or VSAT technology may be deployed to any given site, depending on service capabilities and cost efficiencies. Both backup technologies have been successfully installed and are currently in operation across the NEXRAD fleet. The EHB 6-540 has been updated with preventative maintenance instructions and test procedures for NEXRAD field technicians to maintain the backup comms systems.  Four portable 4G backup systems and four auto-deploy VSAT systems (fly-aways) are maintained by Systems Engineering.  These systems have been deployed several times to support site-specific engineering solutions for radar data recovery, and to establish temporary communications paths for radars when required.  Please contact the NEXRAD Hotline for specialized engineering support and deployable backup comms hardware requests.

  • NEXRAD Hub Router
    The NEXRAD Hub Routers enable network communications paths for radar products (National Level III and AWIPS), Master System Control Function (MSCF) radar command and control systems, and National Level II data transmission between DoD and FAA radars and their hosting NWS WFOs. Private IP / Border Gateway Protocol (PIP/BGP) terrestrial T1 circuits and VSAT/4G backup comms systems provide redundant paths from the hosting NWS WFOs hub routers to the distant-end remote radar RPG routers.  NEXRAD hub routers are included in backup comms deployment cases and are engineered/configured for site-specific needs to temporarily provide or restore communications service via 4G or VSAT.  Hub routers are also used at some locations to support digital distant-MSCF communications from DoD base weather stations to remote DoD WSR-88D radars.  The existing Cisco 2901 Hub routers will be replaced with Cisco ISR 4331 Hub routers in the near future, and will support new terrestrial and back communications service in conjunction with the NOAA-wide GSA Enterprise Infrastructure Solutions (EIS) transition contract. 

  • RDA GPS Server
    The current RDA GPS Server has reached end of life and end of support.  As of Build 20, it is being replaced with network-based, Network Time Protocol (NTP) time sources provided by National Level II.The NL2 NTP servers provide reliable and accurate UTC time to multiple network devices in the RDA and the RPG, e.g., servers, routers, and switches. NL2 NTP servers provide accurate timestamps for weather data and products as they are generated. To be useful, weather products and mosaics must have accurate time stamps for meteorologists to issue forecasts and weather alerts to the public. NEXRAD relies on the NL2 NTP servers  to provide an accurate and reliable time source for the RDA and RPG components. Precision timing is a critical factor in the quality and reliability of products disseminated by the NEXRAD weather radar.

  • RPG Router Refresh
    The current RPG Router is end of life and end of support and cannot be expanded to accommodate future needs. Sustainment engineering efforts have found a replacement router that not only meets the current needs but provides the flexibility to meet the requirements of the Enterprise Infrastructure Services (EIS) transition as well as as other future communication needs by using modem communication infrastructure .  A modification note will be provided for field installation of the replacement router.  Deployment started in 2020 and will run through 2021.  

  • RDA Router
    The current RDA Router has reached the end of the systems engineering lifecycle.  This critical device is the gateway between the Radar Data Acquisition (RDA) system and the Radar Product Generator (RPG) system.  A replacement router must not only meet the current requirements but also support the Enterprise Infrastructure Services (EIS) transition.  and  accommodate future needs.  A modification note will be provided for field installation of the replacement router.  Deployment is expected to start in 2021.

  • RDA LAN Switch Refresh 
    The current RDA LAN switch is end of life end of support. The LAN switch is a critical device that houses connections to the console server, router, radar signal processor and power admins.  This device allows all of the connected devices to talk to each other on the same Local Area Network (LAN), which is an important role in the dissemination of radar data.  Sustainment efforts have allowed the ROC (Radar Operations Center) to find  a replacement lan switch that meets the current requirements.  It is also estimated that the refreshed lan switch will offer longer availability times.  The refreshed RDA LAN switch is currently scheduled to deploy with Build 21.0.