MODIFICATION
A -- Request for Testers of a High Accuracy Differential GPS (HANDGPS) System
- Notice Date
- 7/22/2002
- Notice Type
- Modification
- Contracting Office
- Department of Transportation, Federal Highway Administration (FHWA), Office of Acquisition Management, HAAM, Room 4410 400 7th Street, S.W., Washington, DC, 20590
- ZIP Code
- 20590
- Solicitation Number
- Reference-Number-TFHRC-2002-HANDGPS
- Response Due
- 2/1/2003
- Point of Contact
- Rick Murray, Contracting Officer, Phone (202) 366-4250, Fax (202) 366-3705,
- E-Mail Address
-
rick.murray@fhwa.dot.gov
- Description
- INTRODUCTION: The Federal Highway Administration, in association with the US Coast Guard, National Geodetic Survey, and several other government agencies, is implementing a High Accuracy - Nationwide Differential Global Positioning System (HA-NDGPS) capability for test purposes at the Hagerstown, MD, Nationwide Differential Global Positioning System (NDGPS) facility. HANDGPS CONFIGURATION: The current planned configuration is broadcasting carrier phase data on a second low frequency (454 kHz), while maintaining the existing NDGPS broadcast at 307kHz. To achieve this, carrier phase information is collected from one of the existing NDGPS reference receivers and packaged appropriately. This data stream is provided to a new modulator with this modulated signal fed to a new transmitter. This signal is then diplexed onto the existing NDGPS tower and broadcast at a frequency of 454 kHz. DATA AVAILABLE: It was our intention to make receivers available for short periods of time to interested parties (reference ?Request for Testers of a High Accuracy Differential GPS HANDGPS) System? 17 January, 2002). Since these receivers are not yet available, we have opted to make some of the raw data available. The data can be found at ftp://www.ngs.noaa.gov/dist/HA-NDGPS/test101a.02. The data may also be accessed by going to ftp www.ngs.noaa.gov, using the login: ftp, entering your e-mail address as the password and going to directory dist/HA-NDGPS/test101a.02. Please read file ha-ndgps.data.doc for specific contents of the files. POC: If you have any questions concerning this program or need assistance in accessing the data, please contact Mr. Jim Arnold, FHWA, (202)493-3265, james.a.arnold@fhwa.dot.gov.
- Place of Performance
- Address: Various
- Record
- SN00122420-W 20020724/020722213301 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
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