instructions for using opus database (opus db) to publish survey control

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]) 703-428-9026Or Dave Robar ([email protected])

Instructions Developed by Mark Huber ([email protected])

OPUS-DBhttp://www.ngs.noaa.gov/OPUS/OPUS_04.html

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.


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)


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)


It is advisable to submit data to OPUS prior to submittal to OPUS-DB to check accuracy requirements.


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


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

BASELINE NAME: dstr u368 XYZ -2.0951 1.7615 -1.2509 + XYZ ADJUSTMENTS XYZ -6169.2428 -5535259.8731 3158154.2609 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2428 -5535259.8087 3158154.2239 NEW ARP @ 2006.4676 XYZ -6169.2408 -5535258.0745 3158153.2278 NEW MON @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -26.1621 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -26.2363 NEW ARP @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -28.2363 NEW MON @ 2006.4676

BASELINE NAME: nola u368 XYZ -2.0827 1.7309 -1.2587 + XYZ ADJUSTMENTS XYZ -6169.2304 -5535259.9037 3158154.2532 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2303 -5535259.8393 3158154.2162 NEW ARP @ 2006.4676 XYZ -6169.2284 -5535258.1051 3158153.2200 NEW MON @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -26.1394 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -26.2136 NEW ARP @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -28.2136 NEW MON @ 2006.4676

BASELINE NAME: eng2 u368 XYZ -2.0984 1.8274 -1.2810 + XYZ ADJUSTMENTS XYZ -6169.2461 -5535259.8072 3158154.2308 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2460 -5535259.7429 3158154.1938 NEW ARP @ 2006.4676 XYZ -6169.2441 -5535258.0086 3158153.1977 NEW MON @ 2006.4676 LLH 29 52 22.55157 269 56 10.11055 -26.2342 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55157 269 56 10.11055 -26.3084 NEW ARP @ 2006.4676 LLH 29 52 22.55157 269 56 10.11055 -28.3084 NEW MON @ 2006.4676

OPUS-DBExtended Output

Compare the monument elevations to determine the bad reference station (only if result does not meet the 8 cm

accuracy standard)

Peak to Peak0.095(m)

Select bad reference station and add it to “CORS to Exclude from the Solution”

BASELINE NAME: dstr u368 XYZ -2.0951 1.7615 -1.2509 + XYZ ADJUSTMENTS XYZ -6169.2428 -5535259.8731 3158154.2609 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2428 -5535259.8087 3158154.2239 NEW ARP @ 2006.4676 XYZ -6169.2408 -5535258.0745 3158153.2278 NEW MON @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -26.1621 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -26.2363 NEW ARP @ 2006.4676 LLH 29 52 22.55135 269 56 10.11068 -28.2363 NEW MON @ 2006.4676

BASELINE NAME: nola u368 XYZ -2.0827 1.7309 -1.2587 + XYZ ADJUSTMENTS XYZ -6169.2304 -5535259.9037 3158154.2532 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2303 -5535259.8393 3158154.2162 NEW ARP @ 2006.4676 XYZ -6169.2284 -5535258.1051 3158153.2200 NEW MON @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -26.1394 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -26.2136 NEW ARP @ 2006.4676 LLH 29 52 22.55064 269 56 10.11114 -28.2136 NEW MON @ 2006.4676

BASELINE NAME: eng1 u368 XYZ -2.1011 1.7740 -1.2575 + XYZ ADJUSTMENTS XYZ -6169.2488 -5535259.8606 3158154.2544 NEW L1 PHS CEN @ 2006.4676 XYZ -6169.2488 -5535259.7963 3158154.2174 NEW ARP @ 2006.4676 XYZ -6169.2468 -5535258.0620 3158153.2212 NEW MON @ 2006.4676 LLH 29 52 22.55137 269 56 10.11045 -26.1762 NEW L1 PHS CEN @ 2006.4676 LLH 29 52 22.55137 269 56 10.11045 -26.2504 NEW ARP @ 2006.4676 LLH 29 52 22.55137 269 56 10.11045 -28.2504 NEW MON @ 2006.4676

OPUS-DBExtended Output

ENG2 changed to ENG1This solution now passes the ellipsoid height peak to peak

criteria of 0.04 meters

Peak to Peak0.037(m)

4. Submit to ProjectLeave the default setting

This refers to a future version of OPUS called OPUS Projects currently being tested

5. Set User Profile Leave the default setting

6. Submit to Data Base Enter your username and

password and click on “Upload File”

The OPUS SUBMITTAL STATUS screen gives the user a chance to check the input parameters before

continuing

Select the Continue button after checking your antenna type, heights, etc.

The user then selects Mark Recovery, New Mark, or Cancel(select New Mark for adding a new control point)

• Complete the form and select the “Submit to Database” button.

• Fill out as much of the optional portion of this form as possible, specifically the additional photos (Photo 2, Photo 3), Stamping, Stability, etc…

The user is provided submittal status indicating that the information has been received and NGS will review and the user will receive

email advising that the data is acceptable or the data doesn’t meet OPUS-DB criteria


Upon receipt of the submittal status

email from NGS, the user has another

chance to cancel or confirm the submission

Follow the instructions provided

in the E-Mail

If you are re-observing an existing mark, then the user selects Mark Recovery

• Complete the form and select the “Submit to Database” button.

• Fill out as much of the optional portion of this form as possible

The user is provided submittal status indicating that the information has been received and NGS will review and the user will receive

email advising that the data is acceptable or the data doesn’t meet OPUS-DB criteria

instructions for using opus database (opus db) to publish survey control

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