Content-Length: 78171 | pFad | https://geodesy.noaa.gov/OPUS/about.jsp#sharing
NOAA's Online Positioning User Service (OPUS) provides free access to high-accuracy National Spatial Reference System (NSRS) coordinates. OPUS uses the same software which computes coordinates for the nation's geodetic control marks and the NOAA CORS Network (NCN).
To use OPUS, simply upload a GPS data file (collected with a survey-grade GPS receiver) to the OPUS upload page. Your computed NSRS position will be emailed to you. If you choose, your position can also be shared publicly on the NGS website, or added to a larger survey project.
Helpful resources:
To find the correct antenna type, browse antenna calibrations. Correctly selecting your antenna will help OPUS apply the appropriate antenna calibration model to counter the unique measurement biases inherent in each antenna's design. Choosing an incorrect antenna may result in a height error as large as 80 cm and a horizontal error up to 1 cm.
Enter the vertical height (in meters) of your Antenna Reference Point (ARP) above the mark. See antenna calibration for a drawing of the ARP for your antenna (usually the center of the base or tripod mount).
Your OPUS solution will be sent to this address when processing is complete.
Depending on the duration of your data file, OPUS will use either static or rapid-static processing:
Under normal conditions, most positions can be computed to within a few centimeters. However, estimating the accuracy for a specific solution is difficult because formal error propagation is notoriously optimistic for GPS reductions. User errors (such as misidentification of antenna or ARP height) cannot be detected. Local multipath or adverse atmospheric conditions may also negatively impact your solution.
Static: For each coordinate (X, Y, Z, Φ, λ, h, and H), static processing provides the range of the three individual single baselines, also called peak-to-peak errors. These ranges include any error from the base station coordinates.Rapid-Static: The best estimates of coordinate errors are the standard deviations reported by single baseline analysis. Our experiments indicate that the actual error is less than these estimated accuracies more than 95 percent of the time.
Please note: OPUS-RS may perform poorly or fail during periods of high ionospheric disturbance or during the passage of a strong weather front. In general, it is best to avoid collecting GPS data during these events. To avoid collecting data during a geomagnetic storm, see NOAA's Space Weather Prediction Center, which issues geomagnetic storm alerts.
Two solution formats are available:
NGS OPUS SOLUTION REPORT ======================== 9999 OPUS ALERTS, IF ANY ... OPUS DISCLAIMER Error and warning messages are appended here |
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_____ USER: your.email@domain.com USER: Your.email@domain.com Your email address | DATE: ____ April 25, 2022 DATE: April 25, 2022 The date and time you used OPUS |
RINEX FILE: 2438057p.22o RINEX FILE: 2438057p.22o Your data file name, in RINEX format |
TIME: ______ 17:28:17 UTC TIME: 17:28:17 UTC Coordinated Universal Time |
_ SOFTWARE: page5 2008.25 master270.pl SOFTWARE: page5 2008.25 master270.pl 16032 The software we used |
START: 2022/02/26 15:14:00 START: 2022/02/26 15:14:00 The first observation in your data file |
EPHEMERIS: igs21986.eph [precise] EPHEMERIS: igs21986.eph [precise] The orbit file we used |
STOP: 2022/02/26 19:47:00 STOP: 2022/02/26 19:47:00 The last observation in your data file |
_ NAV FILE: brdc0570.22n NAV FILE: brdc0570.22n The navigation file we used |
OBS USED: 10338 / 10976 : 94% OBS USED: 10338 / 10976 : 94% Usable / total observations in your data file |
_ ANT NAME: TRMR8_GNSS NONE ANT NAME: TRMR8_GNSS NONE Your selected antenna type |
# FIXED AMB: ___73 / ___75 : 97% # FIXED AMB: 73 / 75 : 97% For static: Fixed / total ambiguities in your data file.
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ARP HEIGHT: 2.2501 ARP HEIGHT: 2.2501 Your selected antenna height |
OVERALL PHASE RMS: ______ 0.015 (m) OVERALL PHASE RMS: 0.015 (m) For static: overall root mean square (RMS) error for the doubly-differenced iono-free carrier phase observables for the three single baseline solutions. |
REF FRAME: NAD_83(2011)(EPOCH:2010.0000) _________ ITRF2014 (EPOCH:2022.1554)
NAD83 and ITRF2014 Your position: Earth-centered cartesian coordinates in the International Terrestrial Reference Frame (ITRF). |
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________ X: 1342663.281(m) 0.002(m) | 1342662.331(m) 0.002(m) |
________ Y: -4680480.882(m) 0.006(m) | -4680479.449(m) 0.006(m) |
________ Z: 4105726.867(m) 0.005(m) | 4105726.841(m) 0.005(m) |
______ LAT: 40 19 37.75141 0.003(m) LAT: 40 19 37.75141 0.003(m) Latitude and accuracy |
40 19 37.78518 0.003(m) 40 19 37.78518 0.003(m) Latitude and accuracy |
____ E LON: 286 0 22.68025 0.004(m) E LON: 286 0 22.68025 0.004(m) Longitude and accuracy |
286 0 22.65829 0.004(m) 286 0 22.65829 0.004(m) Longitude and accuracy |
____ W LON: 73 59 37.31975 0.004(m) W LON: 73 59 37.31975 0.004(m) Longitude and accuracy |
73 59 37.34171 0.004(m) 73 59 37.34171 0.004(m) Longitude and accuracy |
___ EL HGT: ___ -30.128(m) 0.006(m) EL HGT: -30.128(m) 0.006(m) Ellipsoidal height and accuracy |
-31.395(m) 0.006(m) -31.395(m) 0.006(m) Ellipsoidal height and accuracy |
ORTHO HGT: _____ 2.554(m) 0.049(m) ORTHO HGT: 2.554(m) 0.049(m) The orthometric height |
[NAVD88 (Computed using GEOID18)] [NAVD88 (Computed using GEOID18)] Orthometric height datum, and geoid model used to compute it. |
UTM COORDINATES UTM COORDINATES Additional information on UTM COORDINATES |
STATE PLANE COORDINATES STATE PLANE COORDINATES Additional information on STATE PLANE COORDINATES |
UTM (Zone 18) UTM (Zone 18) UTM Zone ID |
SPC (2900 NJ) SPC (2900 NJ) State Plane Coordinate Zone ID |
Northing (Y) [meters] 4464554.902 | 165960.156 |
Easting (X) [meters] 585486.862 | 193023.668 |
Convergence [degrees] 0.65126667 Convergence [degrees] 0.65126667 Meridian convergence |
0.32765833 |
Point Scale _________ 0.99968996 | 0.99992278 |
Combined Factor _____ 0.99969468 | 0.99992751 |
US NATIONAL GRID DESIGNATOR: 18TWK8548764555(NAD 83) US NATIONAL GRID DESIGNATOR: 18TWK8548764555(NAD 83) The US National Grid coordinates and referenced datum are reported, if applicable |
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BASE STATIONS USED BASE STATIONS USED The CORS we used as reference stations and |
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PID _______ DESIGNATION | LATITUDE __ LONGITUDE __ DIST(m) |
DI3830 NJTP PISCATAWAY CORS ARP | N403225.841 W0742804.135 46686.9 |
DH3768 NJMT NJMT CORS ARP | N404747.350 W0742859.339 66591.5 |
DI1077 NJOC NJOC CORS ARP | N395710.023 W0741136.593 44920.6 |
NEAREST NGS PUBLISHED CONTROL POINT | |
DM6970 853 1942 D TIDAL | N401937.751 W0735937.320 ____ 0.0 |
This position and the above vector components were computed without any knowledge by the National Geodetic Survey
regarding the equipment or field operating procedures used. OPUS automated disclaimer |
Your data helps maintain local ties to the National Spatial Reference System (NSRS). Your shared solutions will also help your community prepare for the NSRS modernization in 2022 by contributing to the GPS on Bench Marks for the Transformation Tool campaign (GPS on BM). The Transformation Tool will enable conversions from current vertical datums to the new North American-Pacific Geopotential Datum of 2022 (NAPGD2022). To see examples, check out shared solutions near you.
NGS continues to enhance the Online Positioning User Service (OPUS). The projects described below are in progress to further develop OPUS-Projects so that GNSS control surveys
can be more efficiently completed according to NGS standards and guidelines, assessed for quality, submitted for review, and published in the NGS Integrated Database (IDB).
See also the 03 February 2021 OPUS User Forum - Where We Are and Where We're Going
The NGS processing engine for static surveys, PAGES, is being rewritten to incorporate GNSS constellations besides GPS, as well as other housekeeping improvements.
Fetched URL: https://geodesy.noaa.gov/OPUS/about.jsp#sharing
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