Instructions for Using OPUS Database (OPUS DB) to Publish Survey Control The following are instructions for using the NOAA National Geodetic Survey’s OPUS Database for adding and recovering control points/monuments in the National Spatial Reference System (NSRS) NOAA NGS POC: Rick Foote ([email protected]) USACE CEPD POC: Jim Garster ([email protected]) 703-428-9026 Or Dave Robar ([email protected]) Instructions Developed by Mark Huber ([email protected])
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Instructions for Using OPUS Database (OPUS DB) to Publish Survey Control
The following are instructions for using the NOAA National Geodetic Survey’s OPUS Database for adding and recovering control points/monuments in the National Spatial Reference System (NSRS) NOAA NGS POC: Rick Foote ( [email protected] ) USACE CEPD POC: - PowerPoint PPT Presentation
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Instructions for Using OPUS Database (OPUS DB) to Publish Survey Control
The following are instructions for using the NOAA National Geodetic Survey’s OPUS Database for adding and recovering control points/monuments in the National Spatial Reference System (NSRS)
On-line Positioning User Service (OPUS) allows users to submit raw GPS observations via a web interface and provide the user a position based on three Continuously Operating Reference Stations (CORS) sites. The National Geodetic Survey has now extended the capabilities of OPUS to include OPUS Database (OPUS DB) that will allow a user to submit a 4-hour raw GPS observation session along with photos, station description and a few other items and have the new monumented control point published in the National Spatial Reference System (NSRS) database. The following instructions provide the details on using OPUS DB.
OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html
Requirements:
• dual frequency GPS observations• min of 4 hours of continuous GPS observations• fixed height tripod• NGS calibrated GPS antenna • minimum 90% observations used • minimum 80% fixed ambiguities • maximum 0.02m horizontal peak-to-peak • maximum 0.04m vertical peak-to-peak (ellipsoid)
OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html
Requirements:
• Required For Recovering Existing Control– station PID
• Required For Establishing New Stations– station designation ( a unique name usually stamped onto the
station ) – descriptive text (remarks & witness measurements; no to-reach
description required) – one photo (.jpg only) of mark showing stamping, datum point,
setting– setting + specific setting text (plus rod and sleeve depths, if
applicable)
OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html
It is advisable to submit data to OPUS prior to submittal to OPUS-DB to check accuracy requirements.
OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html
Go to the OPUS DB web site (see link above)• currently OPUS-DB uses a different webpage than OPUS
First time users will have to register• select “Register to Publish OPUS Results” button on
the left side of the screen• scroll down to the “New Registrants” and fill out the
required fields
Click Here to Register
scroll down to the “New Registrants” and fill out the required fields
upon E-Mail notification of
acceptance from NGS, you may
continue
OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html
Fill out the OPUS page and click Options
1. Select State Plane Coordinate ZoneLeave “0-Auto” or select State Plane from pull down list
2. Select CORS To Use – Or Not Use – As Base StationsUnder this option leave as is the first time you submit the data. If your
data set fails to meet the 0.08 m (8 cm) you use this option to “Exclude” the CORS site with the highest accuracy
3. Extended OutputIt is advisable to request the extended output to check for bad CORS
stations in the event the ellipsoid height peak to peak is greater than 0.08 meters. This can be done by comparing the elevations derived from each of the reference stations to pick the one farthest from the
mean. The user can omit the bad reference station in Block 2 to improve the peak to peak results