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K.I.S.S. GPS hello.

Access the National Spatial Reference System (NSRS) for GPS users with OPUS. Get fast, accurate, and reliable positioning with this online service.

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K.I.S.S. GPS hello.

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  1. K.I.S.S. GPS hello. joe.evjen@noaa.gov

  2. WHAT IS OPUS? • On-line Positioning User Service • Fast & easy access to the NSRS (National Spatial Reference System) for GPS users

  3. Why do we need OPUS? • Recognize most positioning done with GPS • Want to provide fast, accurate, consistent, reliable access to NSRS • CORS data alone does not ensure consistency • OPUS • NGS computers • NGS software • Standard parameterization • Standard coordinates/velocities • Your machine talks to our machine

  4. Quick Link to OPUS from NGS Home Page www.ngs.noaa.gov

  5. You’ve got mail! OPUS solution

  6. National CORS CORS Network: Where We are Today • 1191 National CORS • 190+ Cooperative CORS

  7. Baseline Plot National

  8. How does OPUS compute your position? 3 single baselines computed solution 2 CORS solution 1 solution 3 3 positions averaged — simple mean (equal weights)

  9. How Does OPUS Pick Base Stations? • Estimate position for remote station • Compute distance to every available CORS • Sort CORS by increasing distance • Select the 5 closest CORS • Look at 1st 3 CORS with TEQC program. Criteria: ● data cover time span for remote station ● > 80% of data available ● low multipath ● if not, replace with 4th CORS (then 5th) 6. Start single baseline solutions using 1st 3 CORS ● check solution quality ● if bad solution, replace CORS with 4th (then 5th)

  10. ARP The height is measured vertically (NOT the slant height) from the mark to the ARP of the antenna. The height is measured in meters. The ARP is almost always the center of the bottom-most, permanently attached, surface of the antenna. See GPS Antenna Calibration for photo’s and diagrams that show where the ARP is on most antennas: http://www.ngs.noaa.gov/ANTCAL/ If the default height of 0.0000 is entered, OPUS will return the position of the ARP. MARK HOW IS THE ANTENNA HEIGHT MEASURED?

  11. phase ctr. WHY DO I NEED THE ANTENNA TYPE? The antenna phase centers are located somewhere around here. The antenna offsets are the distance between the phase centers and the ARP ARP You do not need to know these offsets. They are passed to the processing software through the antenna type The Antenna Reference Point (ARP) is almost always located in the center of the bottom surface of the antenna. Incorrect or missing antenna type big vertical errors

  12. How Can I Improve My Results? • Data sets of at least • four hours have been • shown to produce • more reliable results • Consider observing a longer session • Avoid conditions that perturb the GPS signal—unsettled weather, solar flares, multipath (nearby reflective surfaces)

  13. OPUS Output - Standard FILE: corv0590.05o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP). 1008 NGS OPUS SOLUTION REPORT ======================== USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) REF FRAME: NAD_83(CORS96)(EPOCH:2002.0000) ITRF00 (EPOCH:2005.1596) X: -2498423.165(m) 0.018(m) -2498423.872(m) 0.018(m) Y: -3802822.048(m) 0.021(m) -3802820.836(m) 0.021(m) Z: 4454737.695(m) 0.024(m) 4454737.792(m) 0.024(m) LAT: 44 35 7.91054 0.002(m) 44 35 7.92698 0.002(m) E LON: 236 41 43.48129 0.014(m) 236 41 43.42434 0.014(m) W LON: 123 18 16.51871 0.014(m) 123 18 16.57566 0.014(m) EL HGT: 107.485(m) 0.034(m) 107.108(m) 0.034(m) ORTHO HGT: 130.010(m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] 4936954.907 105971.557 Easting (X) [meters] 475821.322 2277335.385 Convergence [degrees] -0.21381402 -1.98897497 Point Scale 0.99960719 0.99994603 Combined Factor 0.99959034 0.99992918 US NATIONAL GRID DESIGNATOR: 10TDQ7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N443506.072 W1240342.736 60138.7 AJ6959 CHZZ CAPE MEARS CORS ARP N452911.437 W1235841.187 113322.4 DH4503 P376 EOLARESVR_OR2004 CORS ARP N445628.313 W1230608.100 42648.2 NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N443507.910 W1231816.519 0.0

  14. Allowable Data Formats • RINEX Receiver Independent Exchange--uncompressed • Manufacturer’s native / raw (binary)—uncompressed--as long as UNAVCO’s teqc program can process it • Compressed archive of multiple files. Archive must contain RINEX “site123h.04o” or Hatanaka “site123h.04d” • Compressed individual files.“Site123h.zip”must • contain “site123h.06o” or “site123h.06d”

  15. Select state plane coordinate zone • Select or exclude base stations including Cooperative CORS • Extended Output • Set user profile Associate antenna type, antenna height, SPC code, selected base stations and extended option choices with your email address

  16. Solution Options + set user profile + select CORS + select software Report Options + extended report + XML report + select state plane SharingOptions + add to database + add to campaign

  17. OPUS OutputStandard FILE: corv0590.05o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP). 1008 NGS OPUS SOLUTION REPORT ======================== USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) REF FRAME: NAD_83(CORS96)(EPOCH:2002.0000) ITRF00 (EPOCH:2005.1596) X: -2498423.165(m) 0.018(m) -2498423.872(m) 0.018(m) Y: -3802822.048(m) 0.021(m) -3802820.836(m) 0.021(m) Z: 4454737.695(m) 0.024(m) 4454737.792(m) 0.024(m) LAT: 44 35 7.91054 0.002(m) 44 35 7.92698 0.002(m) E LON: 236 41 43.48129 0.014(m) 236 41 43.42434 0.014(m) W LON: 123 18 16.51871 0.014(m) 123 18 16.57566 0.014(m) EL HGT: 107.485(m) 0.034(m) 107.108(m) 0.034(m) ORTHO HGT: 130.010(m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] 4936954.907 105971.557 Easting (X) [meters] 475821.322 2277335.385 Convergence [degrees] -0.21381402 -1.98897497 Point Scale 0.99960719 0.99994603 Combined Factor 0.99959034 0.99992918 US NATIONAL GRID DESIGNATOR: 10TDQ7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N443506.072 W1240342.736 60138.7 AJ6959 CHZZ CAPE MEARS CORS ARP N452911.437 W1235841.187 113322.4 DH4503 P376 EOLARESVR_OR2004 CORS ARP N445628.313 W1230608.100 42648.2 NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N443507.910 W1231816.519 0.0

  18. USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) Reading OPUS Output • Your email address & observation file. Solution run date & time • The version of PAGES software used for processing • The ephemeris used (OPUS will use the best available): • “igs” final post-fit orbit--better than 1 cm (10-14 days wait) • “igr” rapid post-fit orbit--better than 2 cm (17 hours wait) • “igu” ultra-rapid predicted orbit--better than 20 cm (available • immediately) • Navigation file used • The antenna type you selected and height of antenna reference point height you entered. Confirm that these are correct.

  19. Reading OPUS Output con’t. USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) • Start & end dates & times of your file • Ratio and % of observations used in solution • Ratio and % of fixed/total ambiguities • Overall RMS of the solution

  20. Guidelines for Good Solution • Make sure antenna type and height are correct • Review statistics: • at least 90% of observations should be used • OBS USED: 4228 / 4314 : 98% • at least 50% of the ambiguities should be fixed • # FIXED AMB: 25 / 29 : 86% • overall RMS should seldom exceed 0.030 m • OVERALL RMS: 0.013(m) • In case of bad statistics, try choosing different CORS and re-submit.

  21. Reading OPUS Output con’t.Solution/Coordinates REF FRAME: NAD_83(CORS96)(EPOCH:2002.0000) ITRF00 (EPOCH:2005.1596) X: -2498423.165(m) 0.018(m) -2498423.872(m) 0.018(m) Y: -3802822.048(m) 0.021(m) -3802820.836(m) 0.021(m) Z: 4454737.695(m) 0.024(m) 4454737.792(m) 0.024(m) LAT: 44 35 7.91054 0.002(m) 44 35 7.92698 0.002(m) E LON: 236 41 43.48129 0.014(m) 236 41 43.42434 0.014(m) W LON: 123 18 16.51871 0.014(m) 123 18 16.57566 0.014(m) EL HGT: 107.485(m) 0.034(m) 107.108(m) 0.034(m) ORTHO HGT: 130.010(m) 0.043(m) [Geoid03 NAVD88] • Reference frames. Epochs • Position, xyz • Peak-peak errors, xyz (range, max-min) • Position, lat / long / eh / oh • Peak-peak for lat/long etc • Peak-peak errors may vary between NAD83 & ITRF • Orthometric ht. is based on current geoid model

  22. How does OPUS estimate errors? peak to peak Example from ITRF x coordinate of corv059 output. The decimal portions of the three solutions in the extended output are: .8690, .8709 and .8861 m. The simple mean of these values as displayed in the output is .875. Sigma is .009. The peak-peak (max-min) distance is .017. The peak-peak can perhaps be thought of as approximating 2 sigma, but is not intended to be relied on in that fashion. It is intended simply as a conservative estimate of the solution accuracy. meters mean .880 .870 .890 .860 newp-corv p376-corv chzz-corv Peak-peak error = .017 m Conservative accuracy estimate, ~ 2 σ Mean +/-2 σ (.018 m) Mean +/-1 σ (.009 m) Peak-peak should seldom exceed 5 cm Vertical is typically at least twice horizontal

  23. solution 2 your peak-to-peaks:scaled from the spread of the 3 CORS solutions h f your position: averaged from the 3 CORS solutions CORS solution 1 l solution 3

  24. OPUS Output con’t.Grid Coordinates • UTM COORDINATES STATE PLANE COORDINATES • UTM (Zone 10) SPC (3601 OR N) • Northing (Y) [meters] 4936954.907 105971.557 • Easting (X) [meters] 475821.322 2277335.385 • Convergence [degrees] -0.21381402 -1.98897497 • Point Scale 0.99960719 0.99994603 • Combined Factor 0.99959034 0.99992918 • US NATIONAL GRID DESIGNATOR: 10TDQ7582136955(NAD 83) • Universal Transverse Mercator (UTM) coordinates • US National Grid • State Plane coordinates (if requested)

  25. READING OPUS OUTPUT (control) • BASE STATIONS USED • PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) • AH2489 NEWP NEWPORT CORS ARP N443506.072 W1240342.736 60138.7 • AJ6959 CHZZ CAPE MEARS CORS ARP N452911.437 W1235841.187 113322.4 • DH4503 P376 EOLARESVR_OR2004 CORS ARP N445628.313 W1230608.100 42648.2 • NEAREST NGS PUBLISHED CONTROL POINT • AH2486 CORVALLIS CORS ARP N443507.910 W1231816.519 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. • Base Stations--NAD83 position--distance away • The closest published station in the NGS data base • In case you didn’t know it was there • Disclaimer

  26. Areas Covered by OPUS

  27. OPUS in the works • ¢¢ receivers *OPUS mapper • minutesof data OPUS-RS • multiple receivers *OPUS-projects • shareresults *OPUS-DB • delimitedresults OPUS-XML • globalresults *OPUS-global • GNSS signals *OPUS-GNSS • D heights*OPUS-leveling DEFAULTS: • $$$ receiver • hours of data • one receiver • no archive • no delimiters • US only • GPS only Operational components are available at http://www.ngs.noaa.gov/OPUS/ * Prototype components are available at http://beta.ngs.noaa.gov/OPUS/

  28. OPUS Output - Standard OPUS Output - XML FILE: corv0590.05o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP). 1008 NGS OPUS SOLUTION REPORT ======================== USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) REF FRAME: NAD_83(CORS96)(EPOCH:2002.0000) ITRF00 (EPOCH:2005.1596) X: -2498423.165(m) 0.018(m) -2498423.872(m) 0.018(m) Y: -3802822.048(m) 0.021(m) -3802820.836(m) 0.021(m) Z: 4454737.695(m) 0.024(m) 4454737.792(m) 0.024(m) LAT: 44 35 7.91054 0.002(m) 44 35 7.92698 0.002(m) E LON: 236 41 43.48129 0.014(m) 236 41 43.42434 0.014(m) W LON: 123 18 16.51871 0.014(m) 123 18 16.57566 0.014(m) EL HGT: 107.485(m) 0.034(m) 107.108(m) 0.034(m) ORTHO HGT: 130.010(m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] 4936954.907 105971.557 Easting (X) [meters] 475821.322 2277335.385 Convergence [degrees] -0.21381402 -1.98897497 Point Scale 0.99960719 0.99994603 Combined Factor 0.99959034 0.99992918 US NATIONAL GRID DESIGNATOR: 10TDQ7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N443506.072 W1240342.736 60138.7 AJ6959 CHZZ CAPE MEARS CORS ARP N452911.437 W1235841.187 113322.4 DH4503 P376 EOLARESVR_OR2004 CORS ARP N445628.313 W1230608.100 42648.2 NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N443507.910 W1231816.519 0.0 FILE: corv0590.05o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP). 1008 NGS OPUS SOLUTION REPORT ======================== USER: jeff.olsen@noaa.gov DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page5 0601.10 master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc0590.05n OBS USED: 4228 / 4314 : 98% ANT NAME: ASH700936B_M NONE # FIXED AMB: 25 / 29 : 86% ARP HEIGHT: 0.0 OVERALL RMS: 0.013(m) REF FRAME: NAD_83(CORS96)(EPOCH:2002.0000) ITRF00 (EPOCH:2005.1596) X: -2498423.165(m) 0.018(m) -2498423.872(m) 0.018(m) Y: -3802822.048(m) 0.021(m) -3802820.836(m) 0.021(m) Z: 4454737.695(m) 0.024(m) 4454737.792(m) 0.024(m) LAT: 44 35 7.910540.002(m) 44 35 7.92698 0.002(m) E LON: 236 41 43.481290.014(m) 236 41 43.42434 0.014(m) W LON: 123 18 16.518710.014(m) 123 18 16.57566 0.014(m) EL HGT: 107.485(m) 0.034(m) 107.108(m) 0.034(m) ORTHO HGT: 130.010(m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] 4936954.907105971.557 Easting (X) [meters] 475821.3222277335.385 Convergence [degrees] -0.21381402-1.98897497 Point Scale 0.999607190.99994603 Combined Factor 0.999590340.99992918 US NATIONAL GRID DESIGNATOR: 10TDQ7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N443506.072 W1240342.736 60138.7 AJ6959 CHZZ CAPE MEARS CORS ARP N452911.437 W1235841.187 113322.4 DH4503 P376 EOLARESVR_OR2004 CORS ARP N445628.313 W1230608.100 42648.2 NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N443507.910 W1231816.519 0.0 <?xml version="1.0" encoding="UTF-8"?> <OPUS_SOLUTION> <USER_INFORMATION> <USER_EMAIL> joe.evjen@gmail.com </USER_EMAIL> <SOLUTION_DATE> February 19, 2008 </SOLUTION_DATE> <SOLUTION_TIME> 01:16:22 UTC </SOLUTION_TIME> <RINEX_FILE_NAME> zzyy1500.07o </RINEX_FILE_NAME> </USER_INFORMATION> <DATA_INFORMATION> <SOFTWARE> <PAGES_VERSION> page5 0612.06 </PAGES_VERSION> <OPUS_VERSION> master3.pl </OPUS_VERSION> </SOFTWARE> <EMPHEMERIS> igs14293.eph [precise] </EMPHEMERIS> <NAV_FILE> brdc1500.07n </NAV_FILE> <ANTENNA_NAME> TRM41249.00 NONE </ANTENNA_NAME> <ARP_HEIGHT> 0.0 </ARP_HEIGHT> <START_TIME> 2007/05/30 00:00:00 </START_TIME> <END_TIME> 2007/05/30 23:59:00 </END_TIME> <OBS_USED> <NUMBER_USED> 52955 </NUMBER_USED> <TOTAL_OBS> 55069 </TOTAL_OBS> <PERCENTAGE> 96 </PERCENTAGE> </OBS_USED> <FIXED_AMB> <NUMBER_FIXED> 218 </NUMBER_FIXED> <NUMBER_AMB> 242 </NUMBER_AMB> <PERCENTAGE> 90 </PERCENTAGE> </FIXED_AMB> <OVERALL_RMS UNIT="m"> 0.021 </OVERALL_RMS> </DATA_INFORMATION> <POSITION> <REF_FRAME> NAD_83(CORS96) </REF_FRAME> <EPOCH> 2002.0000 </EPOCH> <COORD_SET> <RECT_COORD> <COORDINATE AXIS="X" UNIT="m" UNCERTAINTY="0.003"> -496255.901 </COORDINATE> <COORDINATE AXIS="Y" UNIT="m" UNCERTAINTY="0.022"> -5510741.494 </COORDINATE> <COORDINATE AXIS="Z" UNIT="m" UNCERTAINTY="0.017"> 3162058.243 </COORDINATE> </RECT_COORD> <ELLIP_COORD> <LAT> <DEGREES> 29 </DEGREES> <MINUTES> 54 </MINUTES> <SECONDS> 48.44070 </SECONDS> <UNCERTAINTY> 0.003 </UNCERTAINTY> <UNCERTAINTY_UNIT>m </UNCERTAINTY_UNIT> </LAT> <EAST_LONG> <DEGREES>264 </DEGREES> <MINUTES>51</MINUTES> <SECONDS>15.31122</SECONDS> <UNCERTAINTY>0.002</UNCERTAINTY> <UNCERTAINTY_UNIT>m</UNCERTAINTY_UNIT> </EAST_LONG> <EL_HEIGHT> <VALUE>-7.199</VALUE> <UNCERTAINTY>0.027</UNCERTAINTY> <UNCERTAINTY_UNIT>m</UNCERTAINTY_UNIT> </EL_HEIGHT> </ELLIP_COORD> </COORD_SET> </POSITION> <POSITION> <REF_FRAME>ITRF00 (EPOCH:2007.4096)</REF_FRAME> <EPOCH>2007.4096</EPOCH> <COORD_SET> <RECT_COORD> <COORDINATE AXIS="X" UNIT="m" UNCERTAINTY="0.003">-496256.585</COORDINATE> <COORDINATE AXIS="Y" UNIT="m" UNCERTAINTY="0.022">-5510740.027</COORDINATE> <COORDINATE AXIS="Z" UNIT="m" UNCERTAINTY="0.017">3162058.057</COORDINATE> </RECT_COORD> <ELLIP_COORD> <LAT> <DEGREES>29</DEGREES> <MINUTES>54</MINUTES> <SECONDS>48.45813</SECONDS> <UNCERTAINTY>0.003</UNCERTAINTY> <UNCERTAINTY_UNIT>m</UNCERTAINTY_UNIT> </LAT> <EAST_LONG> <DEGREES>264</DEGREES> <MINUTES>51</MINUTES> <SECONDS>15.28092</SECONDS> <UNCERTAINTY>0.002</UNCERTAINTY> <UNCERTAINTY_UNIT>m</UNCERTAINTY_UNIT> </EAST_LONG> <EL_HEIGHT> <VALUE>-8.505</VALUE> <UNCERTAINTY>0.027</UNCERTAINTY> <UNCERTAINTY_UNIT>m</UNCERTAINTY_UNIT> </EL_HEIGHT> </ELLIP_COORD> </COORD_SET> </POSITION> <ORTHO_HGT UNCERTAINTY="0.037" UNIT="m" SOURCE="[Geoid03 NAVD88]">20.154</ORTHO_HGT> <PLANE_COORD_INFO> <PLANE_COORD_SPEC TYPE="UTM" ZONE="15"> <NORTHING UNIT="m">3311130.625</NORTHING> <EASTING UNIT="m">292843.826</EASTING> <CONVERGENCE UNIT="deg">-1.07044705</CONVERGENCE> <SCALE>1.00012949</SCALE> <CF>1.00013062</CF> </PLANE_COORD_SPEC> <PLANE_COORD_SPEC TYPE="SPC" ZONE="4204(TXSC )"> <NORTHING UNIT="m">4236668.327</NORTHING> <EASTING UNIT="m">972105.452</EASTING> <CONVERGENCE UNIT="deg">1.88824726</CONVERGENCE> <SCALE>0.99991407</SCALE> <CF>0.99991520</CF> </PLANE_COORD_SPEC> <USNG>15RTP9284411131(NAD 83) </USNG> </PLANE_COORD_INFO> <BASE_STATION_USED> <PID>DE5999</PID> <STATION_ID>ADKS</STATION_ID> <DESIGNATION>ADDICKS 1795 CORS ARP</DESIGNATION> <LATITUDE>N294727.47185</LATITUDE> <LONGITUDE>W0953511.04262</LONGITUDE> <DISTANCE>44692.309</DISTANCE> </BASE_STATION_USED> <BASE_STATION_USED> <PID>DJ8995</PID> <STATION_ID>ROD1</STATION_ID> <DESIGNATION>ROD1 CORS ARP</DESIGNATION> <LATITUDE>N300420.45377</LATITUDE> <LONGITUDE>W0953136.45801</LONGITUDE> <DISTANCE>40769.489</DISTANCE> </BASE_STATION_USED> <BASE_STATION_USED> <PID>DH3612</PID> <STATION_ID>TXLI</STATION_ID> <DESIGNATION>LIBERTY CORS ARP</DESIGNATION> <LATITUDE>N300321.18092</LATITUDE> <LONGITUDE>W0944615.67967</LONGITUDE> <DISTANCE>39457.656</DISTANCE> </BASE_STATION_USED> <NGS_PUBLISHED_CONTROL_POINT> <PID>AA9861</PID> <DESIGNATION>LAKE HOUSTON 2050 CORS L1 PHS </DESIGNATION> <LATITUDE>N295448.44005</LATITUDE> <LONGITUDE>W0950844.68949</LONGITUDE> <DISTANCE>0.000</DISTANCE> </NGS_PUBLISHED_CONTROL_POINT> <NOTE> This position and the above vector components were computed without any knowledge by the National Geodetic Survey regarding the equiqment or field operating procedure used. </NOTE> </OPUS_SOLUTION>

  29. OPUS Concept NGS-modeled antenna OPUS DatasheetConcept control station description * control stationphoto * antenna type, height (4+hr, good stats) GPS data *optional for “existing” stations. datasheet review QA/QC register your agency OPUS websitehttp://geodesy.noaa.gov/OPUS control station monument ------public yourdatasheet

  30. Z 125 1935 control station requirements Stable Permanent Unique Recoverable Safe US COAST & GEODETIC SURVEY --|-- control station monument

  31. GPS data requirements NGS-modeled antenna • “OPUSable” • 4+ hours of dual frequency data • NGS-calibrated antenna • OPUS must achieve: • ≥ 90% observations used • ≥ 80% ambiguities fixed • ≤ 0.02m peak-to-peak horizontal • ≤ 0.04m peak-to-peak vertical (4+hr, good stats) GPS data

  32. metadata requirements observationnotes control station description * control stationphoto * antenna type, height *optional for “existing” stations. Simplified bluebooking

  33. OPUS-Projects In the usual OPUS procedure, the user submits his GPS data and receives a solution via email. OPUS GPS DATA USER SOLUTION

  34. OPUS-Projects In OPUS-Projects the OPUS solutions can be emailed to any number of persons associated with the project, allowing data collection and quality to be closely monitored. The data is also delivered to the project directory for network processing as data collection for each day is completed. OPUS GPS DATA USER SOLUTION GPS DATA Project Project Management, etc. ADJUSTED SOLUTION

  35. From the Field Point of View • Observer submits all data to OPUS • 1st Data Submission • Completes main page (antenna type & ARP hgt.) • Selects options • Enters project ID & sets profile • All subsequent data submissions • Needs only to enter email address and data • Profile values fixed to email address

  36. From the Project Managers Point of View • Receives OPUS solution emails from all observers • Monitor data collection • Monitor data quality • Data file management is provided • Daily network solutions while project is still underway • Near real time feedback to project personnel

  37. OPUS-RS (Rapid Static) • Became operational February 2007 • Allows data spans as short as 15 min. • Uses software developed at OSU providing rapid ambiguity resolution

  38. GIS Works Here # of People Who Care NGS Works Here mm cm dm m dam hm km Position Accuracy

  39. OPUS-GIS • Accepts single frequency data • Accepts kinematic data • Differential range solution to CORS • Kinematic trajectory report • Static occupation report • Shape files are coming

  40. Why do we need OPUS-GIS? • Centimeter accuracy not appropriate for all objects • Lower grade receivers can deliver usable results • Recover kinematic traverses • Consistent application to NSRS across accuracy spectrum

  41. Effect of Differential Positioning N N W E W E S S Point positioning Differential Positioning

  42. OPUS–GIS Kinematic Trajectory Report 2005/12/ 3 17: 1:31.0 2.9 1.160 954480.027 -5680360.821 2729931.909 1.056 2.848 1.418 25.5077314 -80.4616043 -27.099 0.913 1.239 2.977 2005/12/ 3 17: 1:32.0 3.2 1.236 954481.086 -5680362.067 2729932.279 1.441 3.341 1.528 25.5077290 -80.4615959 -25.672 1.070 1.474 3.500 2005/12/ 3 17: 1:33.0 3.2 1.222 954481.036 -5680362.056 2729932.286 1.426 3.303 1.511 25.5077291 -80.4615964 -25.687 1.059 1.458 3.461 2005/12/ 3 17: 1:34.0 3.2 1.083 954481.059 -5680362.424 2729932.291 1.263 2.926 1.338 25.5077277 -80.4615968 -25.353 0.938 1.292 3.066 2005/12/ 3 17: 1:35.0 3.2 1.067 954480.952 -5680362.523 2729932.256 1.245 2.881 1.318 25.5077271 -80.4615980 -25.297 0.924 1.272 3.018 2005/12/ 3 17: 1:36.0 2.9 1.072 954480.179 -5680361.378 2729932.061 0.975 2.626 1.307 25.5077304 -80.4616037 -26.515 0.844 1.143 2.746 2005/12/ 3 17: 1:37.0 2.9 1.007 954480.317 -5680361.418 2729932.122 0.916 2.467 1.228 25.5077307 -80.4616024 -26.432 0.793 1.074 2.579 2005/12/ 3 17: 1:38.0 2.9 0.926 954480.509 -5680361.612 2729932.255 0.843 2.268 1.129 25.5077309 -80.4616009 -26.174 0.729 0.987 2.370 2005/12/ 3 17: 1:39.0 2.9 0.852 954480.740 -5680361.761 2729932.392 0.776 2.088 1.040 25.5077313 -80.4615988 -25.947 0.671 0.909 2.183 2005/12/ 3 17: 1:40.0 2.9 0.772 954480.960 -5680361.889 2729932.507 0.703 1.891 0.941 25.5077316 -80.4615969 -25.752 0.608 0.824 1.977 2005/12/ 3 17: 1:41.0 2.9 0.751 954481.064 -5680362.026 2729932.598 0.683 1.838 0.915 25.5077317 -80.4615961 -25.575 0.591 0.801 1.921 2005/12/ 3 17: 1:42.0 2.9 0.732 954481.140 -5680362.105 2729932.554 0.666 1.790 0.891 25.5077310 -80.4615955 -25.512 0.576 0.780 1.871 2005/12/ 3 17: 1:43.0 3.2 0.970 954481.362 -5680362.468 2729932.576 1.132 2.613 1.196 25.5077297 -80.4615939 -25.146 0.841 1.157 2.738 2005/12/ 3 17: 1:44.0 2.9 0.671 954481.325 -5680362.341 2729932.577 0.611 1.641 0.818 25.5077302 -80.4615941 -25.264 0.528 0.716 1.716 2005/12/ 3 17: 1:45.0 2.9 0.639 954481.429 -5680362.449 2729932.646 0.582 1.563 0.779 25.5077303 -80.4615932 -25.123 0.504 0.682 1.634 2005/12/ 3 17: 1:46.0 2.9 0.625 954481.526 -5680362.463 2729932.677 0.569 1.528 0.761 25.5077304 -80.4615923 -25.083 0.493 0.666 1.598 2005/12/ 3 17: 1:47.0 2.9 0.621 954481.582 -5680362.499 2729932.724 0.566 1.518 0.756 25.5077306 -80.4615918 -25.022 0.490 0.662 1.587 Date & Time XYZ XYZ RMS LAT, LON, EL HGT NEU RMS RDOP RMS

  43. OPUS–GIS Static Occupation Report Station #: 1 File: zzyy337r.05o 2005/12/ 3 17: 1:31 954482.055 0.566 25 1 27.8497 0.603 2005/12/ 3 17: 3:14 -5680362.733 0.590 -80 27 41.7152 0.487 #sec: 103 #pts: 104 2729933.535 0.812 -24.3934 0.855 Station #: 2 File: zzyy337r.05o 2005/12/ 3 17: 4:41 955062.476 0.248 25 4 23.5041 0.268 2005/12/ 3 17: 7:23 -5680325.193 0.257 -80 27 20.9951 0.250 #sec: 162 #pts: 163 2729813.609 0.339 -22.6164 0.330 Station #: 3 File: zzyy337r.05o 2005/12/ 3 17: 9:56 955528.756 0.327 25 9 57.3369 0.179 2005/12/ 3 17:12:31 -5680598.380 0.312 -80 27 6.1520 0.280 #sec: 155 #pts: 156 2729086.863 0.359 -22.5733 0.472 Station #: 4 File: zzyy337r.05o 2005/12/ 3 17:14:13 956928.191 2.125 25 14 57.7295 0.045 2005/12/ 3 17:14:23 -5680357.338 0.525 -80 26 15.3043 2.181 #sec: 10 #pts: 11 2729097.676 0.128 -22.7844 0.206 …

  44. OPUS-GIS output • Station #: 1 File: zzyy2230.06o • 2006/ 8/11 1: 1: 0 -659935.745 0.286 32 1 32.5158 0.314 • 2006/ 8/11 2:15: 0 -5328390.873 0.484 -97 3 37.0249 0.260 • #sec: 4440 #pts: 146 3431592.952 0.401 143.0226 0.558 • Station #: 2 File: zzyy2230.06o • 2006/ 8/11 2:15:30 -659935.581 0.281 32 15 32.5078 0.296 • 2006/ 8/11 2:20: 0 -5328391.041 0.626 -97 3 37.0178 0.292 • #sec: 270 #pts: 10 3431592.750 0.424 143.0372 0.692 • Station #: 3 File: zzyy2230.06o • 2006/ 8/11 2:33:30 -659935.568 0.344 32 33 32.5096 0.266 • 2006/ 8/11 2:38:30 -5328391.003 0.586 -97 3 37.0175 0.365 • #sec: 300 #pts: 11 3431592.792 0.361 143.0265 0.623 • Station #: 4 File: zzyy2230.06o • 2006/ 8/11 2:41:30 -659935.598 0.488 32 41 32.5175 0.259 • 2006/ 8/11 2:52: 0 -5328390.395 0.757 -97 3 37.0215 0.431 • #sec: 630 #pts: 22 3431592.697 0.428 142.4706 0.861 • Station #: 5 File: zzyy2230.06o • 2006/ 8/11 2:52:30 -659935.747 0.421 32 52 32.5170 0.280 • 2006/ 8/11 3:35: 0 -5328390.635 0.682 -97 3 37.0260 0.361 • #sec: 2550 #pts: 86 3431592.843 0.425 142.7651 0.784

  45. OPUS Extended Output

  46. Base station and antenna used OPUS Extended Output: Base Station Information Monument starting ITRF coordinates. Velocity in XYZ. NEU offsets Position offsets at mid-pt of session BASE STATION INFORMATION STATION NAME: newp a 10 (Newport; Newport, Oregon USA) ANTENNA: ASH700936B_M S/N=CR16197 XYZ -2548454.0306 -3769449.6516 4454636.5526 MON @ 1997.0000 (M) XYZ -0.0067 0.0016 -0.0042 VEL (M/YR) NEU -0.0000 -0.0000 1.4240 MON TO ARP (M) NEU -0.0000 0.0000 0.1089 ARP TO L1 PHASE CENTER (M) NEU -0.0000 0.0000 0.1274 ARP TO L2 PHASE CENTER (M) XYZ -0.0547 0.0131 -0.0343 VEL TIMES 8.1597 YRS XYZ -0.5680 -0.8402 0.9996 MON TO ARP XYZ -0.0434 -0.0643 0.0764 ARP TO L1 PHASE CENTER XYZ -2548454.6967 -3769450.5430 4454637.5944 L1 PHS CEN @ 2005.1596 XYZ 0.0000 0.0000 0.0000 + XYZ ADJUSTMENTS XYZ -2548454.6967 -3769450.5430 4454637.5944 NEW L1 PHS CEN @ 2005.1596 XYZ -2548454.6533 -3769450.4787 4454637.5180 NEW ARP @ 2005.1596 XYZ -2548454.0852 -3769449.6385 4454636.5184 NEW MON @ 2005.1596 LLH 44 35 6.08851 235 56 17.20688 21.9484 NEW L1 PHS CEN @ 2005.1596 LLH 44 35 6.08851 235 56 17.20688 21.8395 NEW ARP @ 2005.1596 LLH 44 35 6.08851 235 56 17.20688 20.4155 NEW MON @ 2005.1596 XYZ offsets and position ITRF XYZ at mid-pt of session ITRF lat long EH at mid-pt of session These values are usually 0.000 for CORS (as they are here). The differences between initial and computed positions These values are larger for the unknown station as we will see. Time interval to multiply times velocity = decimal year at mid-pt of session minus 1997.0000 = 8.1597 yrs Each CORS has a section like the one above, with ITRF xyz coordinates computed using HTDP velocities for the epoch of the observations (mid-point of the session). Note the above CORS has a monument separate from the ARP (positions coincide but ellipsoid heights are different).

  47. OPUS Extended Output: Remote Station Information REMOTE STATION INFORMATION STATION NAME: corv 1 ANTENNA: ASH700936B_M SNOW S/N=UNKNOWN XYZ -2498422.0030 -3802821.7980 4454738.6350 MON @ 2005.1595 (M) NEU -0.0000 -0.0000 -0.0001 MON TO ARP (M) NEU 0.0000 0.0000 0.1081 ARP TO L1 PHASE CENTER (M) NEU 0.0000 0.0000 0.1256 ARP TO L2 PHASE CENTER (M) XYZ 0.0000 0.0001 -0.0001 MON TO ARP XYZ -0.0423 -0.0643 0.0759 ARP TO L1 PHASE CENTER XYZ -2498422.0452 -3802821.8623 4454738.7108 L1 PHS CEN @ 2005.1596 The initial ITRF xyz position for the station being solved for is displayed for the mid-point of the observation time span. A similar position is obtained for the L1 phase center based on the antenna type selected. The antenna height is 0.000 here because we are solving for the Antenna Reference Point position. Typically, however, you will have entered a non-zero antenna height.

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