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FGCS Methodology Joe Evjen, Chair. Agenda 1)Recent Guidelines 2)OPUS (all-inclusive) 3)Datasheet Format.

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Presentation on theme: "FGCS Methodology Joe Evjen, Chair. Agenda 1)Recent Guidelines 2)OPUS (all-inclusive) 3)Datasheet Format."— Presentation transcript:

1 FGCS Methodology Joe Evjen, Chair

2 Agenda 1)Recent Guidelines 2)OPUS (all-inclusive) 3)Datasheet Format

3 Recent Guidelines Agenda item 1)

4 Recent Guidelines Heights –Bench Mark ResetBench Mark Reset –GPS-derived Orthometric HeightsGPS-derived Orthometric Heights Real-Time –Classical RTKClassical RTK –Guidelines for establishing CORSGuidelines for establishing CORS –Developing: Guidelines for establishing RTN

5 OPUS (all-inclusive) Agenda item 2)

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

7 National Geodetic Survey National Ocean Service National Oceanic and Atmospheric Administration G. L. Mader - 7 CORS Forum Sep. 25, 2007 Why do we need OPUS? Recognize most positioning done with GPS Recognize most positioning done with GPS Want to provide fast, accurate, consistent, reliable access to NSRS Want to provide fast, accurate, consistent, reliable access to NSRS CORS data alone does not ensure consistency CORS data alone does not ensure consistency OPUS OPUS NGS computersNGS computers NGS softwareNGS software Standard parameterizationStandard parameterization Standard coordinates/velocitiesStandard coordinates/velocities Your machine talks to our machineYour machine talks to our machine

8 Quick Link to OPUS from NGS Home Page

9 You’ve got mail! OPUS solution

10 1191 National CORS 190+ Cooperative CORS National CORS CORS Network: Where We are Today

11 Baseline Plot National

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

13 DEFAULTS: $$$ receiver hours of data one receiver no archive no delimiters US only GPS only OPUSOPUS in the works ¢¢ ¢¢ receivers * OPUS mapper OPUS mapper minutes minutes of dataOPUS-RSOPUS-RS multiple multiple receivers * OPUS-projects OPUS-projects share share results * OPUS-DB OPUS-DB delimited delimited resultsOPUS-XML global global results * OPUS-global GNSS GNSS signals * OPUS-GNSS  heights * OPUS-leveling Operational components are available at * Prototype components are available at

14 Datasheet format Agenda item 3)

15 Datasheet Basics The NGS Data Sheet See file dsdata.txt for more information about the datasheet. DATABASE = Sybase,PROGRAM = datasheet, VERSION = National Geodetic Survey, Retrieval Date = NOVEMBER 20, 2007 AE8289 *********************************************************************** AE8289 CBN - This is a Cooperative Base Network Control Station. AE8289 TIDAL BM - This is a Tidal Bench Mark. AE8289 DESIGNATION AE8289 PID - AE8289 AE8289 STATE/COUNTY- MN/ST LOUIS AE8289 USGS QUAD - DULUTH (1993) AE8289 AE8289 *CURRENT SURVEY CONTROL AE8289 ___________________________________________________________________ AE8289* NAD 83(2007) (N) (W) ADJUSTED AE8289* NAVD (meters) (feet) ADJUSTED AE8289 ___________________________________________________________________ AE8289 EPOCH DATE AE8289 X , (meters) COMP AE8289 Y - -4,373, (meters) COMP AE8289 Z - 4,624, (meters) COMP AE8289 LAPLACE CORR (seconds) DEFLEC99 AE8289 ELLIP HEIGHT (meters) (02/10/07) ADJUSTED AE8289 GEOID HEIGHT (meters) GEOID03 AE8289 DYNAMIC HT (meters) (feet) COMP AE8289 AE Accuracy Estimates (at 95% Confidence Level in cm) AE8289 Type PID Designation North East Ellip AE AE8289 NETWORK AE AE AE8289 MODELED GRAV- 980,748.1 (mgal) NAVD 88 AE8289 AE8289 VERT ORDER - FIRST CLASS II AE8289 AE8289.The horizontal coordinates were established by GPS observations AE8289.and adjusted by the National Geodetic Survey in February what's on a datasheet –Position –Accuracy –How to locate and identify help files (dsdata.txt, glossary, …)

16 Web Statistics * Datasheets downloaded (including shapefiles) 6.0 million 8.3 million 6.2 million 9.2 million CORS retrievals (User-friendly + FTP) 3.9 million 5.7 million 6.2 million 12.1 million OPUS solutions130,000167,000233,000239,000 * extrapolated from 7 months

17 FILE: corv o NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP) NGS OPUS SOLUTION REPORT ======================== USER: DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc n 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: ) ITRF00 (EPOCH: ) X: (m) 0.018(m) (m) 0.018(m) Y: (m) 0.021(m) (m) 0.021(m) Z: (m) 0.024(m) (m) 0.024(m) LAT: (m) (m) E LON: (m) (m) W LON: (m) (m) EL HGT: (m) 0.034(m) (m) 0.034(m) ORTHO HGT: (m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] Easting (X) [meters] Convergence [degrees] Point Scale Combined Factor US NATIONAL GRID DESIGNATOR: 10TDQ (NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N W AJ6959 CHZZ CAPE MEARS CORS ARP N W DH4503 P376 EOLARESVR_OR2004 CORS ARP N W NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N W OPUS Output - Standard FILE: corv o NOTE: Antenna offsets supplied by the user were zero. Coordinates 1008 returned will be for the antenna reference point (ARP) NGS OPUS SOLUTION REPORT ======================== USER: DATE: January 13, 2006 RINEX FILE: corv059f.05o TIME: 19:08:14 UTC SOFTWARE: page master3.pl START: 2005/02/28 05:00:00 EPHEMERIS: igs13121.eph [precise] STOP: 2005/02/28 06:59:30 NAV FILE: brdc n 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: ) ITRF00 (EPOCH: ) X: (m) 0.018(m) (m) 0.018(m) Y: (m) 0.021(m) (m) 0.021(m) Z: (m) 0.024(m) (m) 0.024(m) LAT: (m) (m) E LON: (m) (m) W LON: (m) (m) EL HGT: (m) 0.034(m) (m) 0.034(m) ORTHO HGT: (m) 0.043(m) [Geoid03 NAVD88] UTM COORDINATES STATE PLANE COORDINATES UTM (Zone 10) SPC (3601 OR N) Northing (Y) [meters] Easting (X) [meters] Convergence [degrees] Point Scale Combined Factor US NATIONAL GRID DESIGNATOR: 10TDQ (NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH2489 NEWP NEWPORT CORS ARP N W AJ6959 CHZZ CAPE MEARS CORS ARP N W DH4503 P376 EOLARESVR_OR2004 CORS ARP N W NEAREST NGS PUBLISHED CONTROL POINT AH2486 CORVALLIS CORS ARP N W February 19, :16:22 UTC zzyy o page master3.pl igs14293.eph [precise] brdc n TRM NONE /05/30 00:00: /05/30 23:59: NAD_83(CORS96) m m m ITRF00 (EPOCH: ) m m m RTP (NAD 83) DE5999 ADKS ADDICKS 1795 CORS ARP N W DJ8995 ROD1 ROD1 CORS ARP N W DH3612 TXLI LIBERTY CORS ARP N W AA9861 LAKE HOUSTON 2050 CORS L1 PHS N W 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. OPUS Output - XML


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