NCGS: Positioning NC today and for the future!

North Carolina Geodetic Survey

Maintenance of a CORS/RTN infrastructure

CORS installation components

• Planningo NGS guidelineso Hardwareo Monumentationo Softwareo Communication

• Installationo Documentationo Submittal to NGS

Guidelines for New and Existing Continuously

Operating Reference Stations (CORS)

www.ngs.noaa.gov/PUBS_LIB/CORS_guidelines.pdf

National Geodetic Survey

National Ocean Survey, NOAA

Silver Spring, MD 20910

January 2013

CORS receiver maintenance

• GNSS receivero Uninterruptible Power Supply

(UPS)− Battery maintenance (keep

maintenance log)

o Receiver location− Protect cable connections− Select a location that is away from

the main traffic area of the room− Near power source− Secure cables

o Document firmware updates− Inform NGS if site is a National

CORS

o Surge protection− Properly grounded

o Display contact information

CORS antenna maintenance

• GNSS antennao Keep antenna surface cleano Confirm orientation of

antenna o Monitor condition of radome

(if installed)o Lighting protection

− Grounded properly− Cable connections protected

from rain/snow

o Antenna cable− Connections (sealed properly)− Check for sun damage− Routing

CORS hardware maintenance

• Hardware maintenanceo Monumentation/mounting

− Damage from elements− Indications of tampering with

mounting device

Site maintenance

• Any new obstructionso Buildingso Towerso Fences

• Any new signal transmitters

• Stabilityo Any construction activity near CORS

• Update photos (submit to NGS if the site is a National CORS)

Monumentation maintenance

• Ground monumentationo Check for:

− Damage− Parking or traffic patterns− Indication of new construction near site

Monumentation (building mount)

• Building mounto Any damage to fastenerso Any damage from rain/snowo Evidence of tampering

• Tools required for maintenance

o Lift trucko Ladder

CORS administration

• IT security• Latencyo Bandwidtho Transmission mediumo Router and switch performanceo Firewallo Wireless network voice/data

traffic

• Serverso Ageo Capacityo Maintenance up to date

Questions?

Gary W. Thompson, PLSo Office: 919-733-3836o Direct:919-948-7844o Email: gary.thompson@ncdps.gov