Скачать презентацию K I S S GPS hello joe evjen noaa
15383f94be8d79ca0590c6ccac75c950.ppt
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K. I. S. S. GPS hello. joe. evjen@noaa. gov
WHAT IS OPUS? • On-line Positioning User Service • Fast & easy access to the NSRS (National Spatial Reference System) for GPS users
Why do we need OPUS? n n 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 National Geodetic Survey National Ocean Service National Oceanic and Atmospheric Administration G. L. Mader - 3 CORS Forum Sep. 25, 2007
Quick Link to OPUS from NGS Home Page www. ngs. noaa. gov
You’ve got mail! OPUS solution
National CORS Network: Where We are Today • 1191 National CORS • 190+ Cooperative CORS
Baseline Plot National
How does OPUS compute your position? 3 single baselines computed solution 2 n 1 lutio RS so CO so lut ion 3 3 positions averaged — simple mean (equal weights)
How Does OPUS Pick Base Stations? 1. 2. 3. 4. 5. 6. Estimate position for remote station Compute distance to every available CORS Sort CORS by increasing distance Select the 5 closest CORS Look at 1 st 3 CORS with TEQC program. Criteria: ● data cover time span for remote station ● > 80% of data available ● low multipath ● if not, replace with 4 th CORS (then 5 th) Start single baseline solutions using 1 st 3 CORS ● check solution quality ● if bad solution, replace CORS with 4 th (then 5 th)
HOW IS THE ANTENNA HEIGHT MEASURED? 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
WHY DO I NEED THE ANTENNA TYPE? The antenna phase centers are located somewhere around here. phase ctr. The antenna offsets are the distance between the phase centers and the 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
How Can I Improve My Results? • Consider observing a longer session • Data sets of at least four hours have been shown to produce more reliable results • Avoid conditions that perturb the GPS signal— unsettled weather, solar flares, multipath (nearby reflective surfaces)
OPUS Output - Standard FILE: corv 0590. 05 o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates returned will be for the antenna reference point (ARP). NGS OPUS SOLUTION REPORT ============ USER: jeff. olsen@noaa. gov RINEX FILE: corv 059 f. 05 o SOFTWARE: EPHEMERIS: NAV FILE: ANT NAME: ARP HEIGHT: DATE: January 13, 2006 TIME: 19: 08: 14 UTC page 5 0601. 10 master 3. pl igs 13121. eph [precise] brdc 0590. 05 n ASH 700936 B_M NONE 0. 0 START: 2005/02/28 05: 00 STOP: 2005/02/28 06: 59: 30 OBS USED: 4228 / 4314 : 98% # FIXED AMB: 25 / 29 : 86% OVERALL RMS: 0. 013(m) REF FRAME: NAD_83(CORS 96)(EPOCH: 2002. 0000) X: Y: Z: E W EL ORTHO -2498423. 165(m) -3802822. 048(m) 4454737. 695(m) LAT: LON: HGT: 44 35 7. 91054 236 41 43. 48129 123 18 16. 51871 107. 485(m) 130. 010(m) Northing (Y) [meters] Easting (X) [meters] Convergence [degrees] Point Scale Combined Factor ITRF 00 (EPOCH: 2005. 1596) 0. 018(m) 0. 021(m) 0. 024(m) -2498423. 872(m) -3802820. 836(m) 4454737. 792(m) 0. 018(m) 0. 021(m) 0. 024(m) 0. 002(m) 44 35 7. 92698 0. 014(m) 236 41 43. 42434 0. 014(m) 123 18 16. 57566 0. 034(m) 107. 108(m) 0. 043(m) [Geoid 03 NAVD 88] 0. 002(m) 0. 014(m) 0. 034(m) UTM COORDINATES UTM (Zone 10) 4936954. 907 475821. 322 -0. 21381402 0. 99960719 0. 99959034 STATE PLANE COORDINATES SPC (3601 OR N) 105971. 557 2277335. 385 -1. 98897497 0. 99994603 0. 99992918 US NATIONAL GRID DESIGNATOR: 10 TDQ 7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH 2489 NEWPORT CORS ARP N 443506. 072 W 1240342. 736 60138. 7 AJ 6959 CHZZ CAPE MEARS CORS ARP N 452911. 437 W 1235841. 187 113322. 4 DH 4503 P 376 EOLARESVR_OR 2004 CORS ARP N 445628. 313 W 1230608. 100 42648. 2 AH 2486 NEAREST NGS PUBLISHED CONTROL POINT CORVALLIS CORS ARP N 443507. 910 W 1231816. 519 0. 0
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 “site 123 h. 04 o” or Hatanaka “site 123 h. 04 d” • Compressed individual files. “Site 123 h. zip”must contain “site 123 h. 06 o” or “site 123 h. 06 d”
• 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
Report Options Solution Sharing Options + extended report + XML report + select state plane + add to database + add to campaign Options + set user profile + select CORS + select software
OPUS Output Standard FILE: corv 0590. 05 o 000416827 1008 NOTE: Antenna offsets supplied by the user were zero. Coordinates returned will be for the antenna reference point (ARP). NGS OPUS SOLUTION REPORT ============ USER: jeff. olsen@noaa. gov RINEX FILE: corv 059 f. 05 o SOFTWARE: EPHEMERIS: NAV FILE: ANT NAME: ARP HEIGHT: DATE: January 13, 2006 TIME: 19: 08: 14 UTC page 5 0601. 10 master 3. pl igs 13121. eph [precise] brdc 0590. 05 n ASH 700936 B_M NONE 0. 0 START: 2005/02/28 05: 00 STOP: 2005/02/28 06: 59: 30 OBS USED: 4228 / 4314 : 98% # FIXED AMB: 25 / 29 : 86% OVERALL RMS: 0. 013(m) REF FRAME: NAD_83(CORS 96)(EPOCH: 2002. 0000) X: Y: Z: E W EL ORTHO -2498423. 165(m) -3802822. 048(m) 4454737. 695(m) LAT: LON: HGT: 44 35 7. 91054 236 41 43. 48129 123 18 16. 51871 107. 485(m) 130. 010(m) Northing (Y) [meters] Easting (X) [meters] Convergence [degrees] Point Scale Combined Factor ITRF 00 (EPOCH: 2005. 1596) 0. 018(m) 0. 021(m) 0. 024(m) -2498423. 872(m) -3802820. 836(m) 4454737. 792(m) 0. 018(m) 0. 021(m) 0. 024(m) 0. 002(m) 44 35 7. 92698 0. 014(m) 236 41 43. 42434 0. 014(m) 123 18 16. 57566 0. 034(m) 107. 108(m) 0. 043(m) [Geoid 03 NAVD 88] 0. 002(m) 0. 014(m) 0. 034(m) UTM COORDINATES UTM (Zone 10) 4936954. 907 475821. 322 -0. 21381402 0. 99960719 0. 99959034 STATE PLANE COORDINATES SPC (3601 OR N) 105971. 557 2277335. 385 -1. 98897497 0. 99994603 0. 99992918 US NATIONAL GRID DESIGNATOR: 10 TDQ 7582136955(NAD 83) BASE STATIONS USED PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m) AH 2489 NEWPORT CORS ARP N 443506. 072 W 1240342. 736 60138. 7 AJ 6959 CHZZ CAPE MEARS CORS ARP N 452911. 437 W 1235841. 187 113322. 4 DH 4503 P 376 EOLARESVR_OR 2004 CORS ARP N 445628. 313 W 1230608. 100 42648. 2 AH 2486 NEAREST NGS PUBLISHED CONTROL POINT CORVALLIS CORS ARP N 443507. 910 W 1231816. 519 0. 0
Reading OPUS Output USER: jeff. olsen@noaa. gov RINEX FILE: corv 059 f. 05 o SOFTWARE: EPHEMERIS: NAV FILE: ANT NAME: ARP HEIGHT: page 5 0601. 10 master 3. pl igs 13121. eph [precise] brdc 0590. 05 n ASH 700936 B_M NONE 0. 0 DATE: January 13, 2006 TIME: 19: 08: 14 UTC START: 2005/02/28 05: 00 STOP: 2005/02/28 06: 59: 30 OBS USED: 4228 / 4314 : 98% # FIXED AMB: 25 / 29 : 86% OVERALL RMS: 0. 013(m) • 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.
Reading OPUS Output con’t. USER: jeff. olsen@noaa. gov RINEX FILE: corv 059 f. 05 o SOFTWARE: EPHEMERIS: NAV FILE: ANT NAME: ARP HEIGHT: DATE: January 13, 2006 TIME: 19: 08: 14 UTC page 5 0601. 10 master 3. pl igs 13121. eph [precise] brdc 0590. 05 n ASH 700936 B_M NONE 0. 0 START: 2005/02/28 05: 00 STOP: 2005/02/28 06: 59: 30 OBS USED: 4228 / 4314 : 98% # FIXED AMB: 25 / 29 : 86% 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
Guidelines for Good Solution Ø Make sure antenna type and height are correct Ø 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) Ø In case of bad statistics, try choosing different CORS and re-submit.
Reading OPUS Output con’t. Solution/Coordinates REF FRAME: NAD_83(CORS 96)(EPOCH: 2002. 0000) X: -2498423. 165(m) 0. 018(m) Y: -3802822. 048(m) 0. 021(m) Z: 4454737. 695(m) 0. 024(m) LAT: 44 35 7. 91054 0. 002(m) E LON: 236 41 43. 48129 0. 014(m) W LON: 123 18 16. 51871 0. 014(m) EL HGT: 107. 485(m) 0. 034(m) ORTHO HGT: 130. 010(m) 0. 043(m) • Reference frames. Epochs ITRF 00 (EPOCH: 2005. 1596) -2498423. 872(m) 0. 018(m) -3802820. 836(m) 0. 021(m) 4454737. 792(m) 0. 024(m) 44 35 7. 92698 0. 002(m) 236 41 43. 42434 0. 014(m) 123 18 16. 57566 0. 014(m) 107. 108(m) 0. 034(m) [Geoid 03 NAVD 88] • 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 NAD 83 & ITRF • Orthometric ht. is based on current geoid model
How does OPUS estimate errors? peak to peak Example from ITRF x coordinate of corv 059 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 . 870 . 860 mean p 376 -corv chzz-corv Mean +/-1 σ (. 009 m) Mean +/-2 σ (. 018 m) . 880 . 890 newp-corv Peak-peak error =. 017 m Conservative accuracy estimate, ~ 2 σ Peak-peak should seldom exceed 5 cm Vertical is typically at least twice horizontal
solution 2 your peak-to-peaks: scaled from the spread of the 3 CORS solutions COR on 1 soluti S h f your position: averaged from the 3 CORS solutions l so lut ion 3
OPUS Output con’t. Grid Coordinates • • UTM COORDINATES UTM (Zone 10) Northing (Y) [meters] 4936954. 907 Easting (X) [meters] 475821. 322 Convergence [degrees] -0. 21381402 Point Scale 0. 99960719 Combined Factor 0. 99959034 • US NATIONAL GRID DESIGNATOR: 10 TDQ 7582136955(NAD 83) STATE PLANE COORDINATES SPC (3601 OR N) 105971. 557 2277335. 385 -1. 98897497 0. 99994603 0. 99992918 • Universal Transverse Mercator (UTM) coordinates • US National Grid • State Plane coordinates (if requested)
READING OPUS OUTPUT (control) • • • BASE STATIONS USED PID DESIGNATION AH 2489 NEWPORT CORS ARP AJ 6959 CHZZ CAPE MEARS CORS ARP DH 4503 P 376 EOLARESVR_OR 2004 CORS ARP • • AH 2486 • • • 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. LATITUDE LONGITUDE DISTANCE(m) N 443506. 072 W 1240342. 736 60138. 7 N 452911. 437 W 1235841. 187 113322. 4 N 445628. 313 W 1230608. 100 42648. 2 NEAREST NGS PUBLISHED CONTROL POINT CORVALLIS CORS ARP N 443507. 910 W 1231816. 519 0. 0 • Base Stations--NAD 83 position--distance away • The closest published station in the NGS data base In case you didn’t know it was there • Disclaimer
Areas Covered by OPUS
OPUS in the works DEFAULTS: $$$ receiver hours of data one receiver no archive no delimiters US only GPS only ¢¢ receivers *OPUS mapper minutes of data OPUS-RS multiple receivers *OPUS-projects share results *OPUS-DB delimited results OPUS-XML global results *OPUS-global GNSS signals *OPUS-GNSS D heights *OPUS-leveling Operational components are available at http: //www. ngs. noaa. gov/OPUS/ * Prototype components are available at http: //beta. ngs. noaa. gov/OPUS/
OPUS Output - Standard FILE: corv 0590. 05 o 000416827 offsets supplied were 1008 NOTE: Antennabe for the antennaby the userpoint zero. Coordinates 1008 returned will reference (ARP).
OPUS Datasheet Concept NGS-modeled antenna OPUS Concept GPS data (4+hr, good stats) antenna type, height control station photo * control station description * *optional for “existing” stations. OPUS website http: //geodesy. noaa. gov/OPUS register your agency control station monument QA/QC datashee t review ------public your datasheet
control station requirements Stable Permanent Unique Recoverable Safe control station monument Z 125 --|-1935
NGS-modeled antenna GPS data requirements GPS data (4+hr, good stats) “OPUSable” 4+ hours of dual frequency data NGS-calibrated antenna OPUS must achieve: ≥ 90% observations used ≥ 80% ambiguities fixed ≤ 0. 02 m peak-to-peak horizontal ≤ 0. 04 m peak-to-peak vertical
metadata requirements observation antenna type, height notes control station photo * control station description * *optional for “existing” stations. Simplified bluebooking
OPUS-Projects In the usual OPUS procedure, the user submits his GPS data and receives a solution via email. GPS DATA USER SOLUTION OPUS
OPUS-Projects In OPUS-Projects the OPUS solutions can be emailed to any number of persons associated with the project, allowing data USER 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. GPS DATA SOLUTION OPUS GPS DATA Project Management, etc. Project ADJUSTED SOLUTION
From the Field Point of View • Observer submits all data to OPUS • 1 st 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
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
• Became operational February 2007 Static) OPUS-RS (Rapid • Allows data spans as short as 15 min. • Uses software developed at OSU providing rapid ambiguity resolution
GIS Works Here # of People Who Care NGS Works Here mm cm dm m dam Position Accuracy hm km
OPUS-GIS • • • Accepts single frequency data Accepts kinematic data Differential range solution to CORS Kinematic trajectory report Static occupation report Shape files are coming
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
Effect of Differential Positioning N W N E S Point positioning W E S Differential Positioning
OPUS–GIS Kinematic Trajectory Report 2005/12/ 3 17: 1: 31. 0 2005/12/ 3 17: 1: 32. 0 2005/12/ 3 17: 1: 33. 0 2005/12/ 3 17: 1: 34. 0 2005/12/ 3 17: 1: 35. 0 2005/12/ 3 17: 1: 36. 0 2005/12/ 3 17: 1: 37. 0 2005/12/ 3 17: 1: 38. 0 2005/12/ 3 17: 1: 39. 0 2005/12/ 3 17: 1: 40. 0 2005/12/ 3 17: 1: 41. 0 2005/12/ 3 17: 1: 42. 0 2005/12/ 3 17: 1: 43. 0 2005/12/ 3 17: 1: 44. 0 2005/12/ 3 17: 1: 45. 0 2005/12/ 3 17: 1: 46. 0 2005/12/ 3 17: 1: 47. 0 2. 9 3. 2 2. 9 2. 9 3. 2 2. 9 1. 160 1. 236 1. 222 1. 083 1. 067 1. 072 1. 007 0. 926 0. 852 0. 772 0. 751 0. 732 0. 970 0. 671 0. 639 0. 625 0. 621 Date & Time 954480. 027 954481. 086 954481. 036 954481. 059 954480. 952 954480. 179 954480. 317 954480. 509 954480. 740 954480. 960 954481. 064 954481. 140 954481. 362 954481. 325 954481. 429 954481. 526 954481. 582 -5680360. 821 -5680362. 067 -5680362. 056 -5680362. 424 -5680362. 523 -5680361. 378 -5680361. 418 -5680361. 612 -5680361. 761 -5680361. 889 -5680362. 026 -5680362. 105 -5680362. 468 -5680362. 341 -5680362. 449 -5680362. 463 -5680362. 499 XYZ RDOP RMS 2729931. 909 2729932. 279 2729932. 286 2729932. 291 2729932. 256 2729932. 061 2729932. 122 2729932. 255 2729932. 392 2729932. 507 2729932. 598 2729932. 554 2729932. 576 2729932. 577 2729932. 646 2729932. 677 2729932. 724 1. 056 1. 441 1. 426 1. 263 1. 245 0. 975 0. 916 0. 843 0. 776 0. 703 0. 683 0. 666 1. 132 0. 611 0. 582 0. 569 0. 566 2. 848 3. 341 3. 303 2. 926 2. 881 2. 626 2. 467 2. 268 2. 088 1. 891 1. 838 1. 790 2. 613 1. 641 1. 563 1. 528 1. 518 1. 418 1. 528 1. 511 1. 338 1. 318 1. 307 1. 228 1. 129 1. 040 0. 941 0. 915 0. 891 1. 196 0. 818 0. 779 0. 761 0. 756 XYZ RMS 25. 5077314 25. 5077290 25. 5077291 25. 5077277 25. 5077271 25. 5077304 25. 5077307 25. 5077309 25. 5077313 25. 5077316 25. 5077317 25. 5077310 25. 5077297 25. 5077302 25. 5077303 25. 5077304 25. 5077306 -80. 4616043 -80. 4615959 -80. 4615964 -80. 4615968 -80. 4615980 -80. 4616037 -80. 4616024 -80. 4616009 -80. 4615988 -80. 4615969 -80. 4615961 -80. 4615955 -80. 4615939 -80. 4615941 -80. 4615932 -80. 4615923 -80. 4615918 -27. 099 -25. 672 -25. 687 -25. 353 -25. 297 -26. 515 -26. 432 -26. 174 -25. 947 -25. 752 -25. 575 -25. 512 -25. 146 -25. 264 -25. 123 -25. 083 -25. 022 LAT, LON, EL HGT 0. 913 1. 070 1. 059 0. 938 0. 924 0. 844 0. 793 0. 729 0. 671 0. 608 0. 591 0. 576 0. 841 0. 528 0. 504 0. 493 0. 490 1. 239 1. 474 1. 458 1. 292 1. 272 1. 143 1. 074 0. 987 0. 909 0. 824 0. 801 0. 780 1. 157 0. 716 0. 682 0. 666 0. 662 2. 977 3. 500 3. 461 3. 066 3. 018 2. 746 2. 579 2. 370 2. 183 1. 977 1. 921 1. 871 2. 738 1. 716 1. 634 1. 598 1. 587 NEU RMS
OPUS–GIS Static Occupation Report Station #: 1 File: zzyy 337 r. 05 o 2005/12/ 3 17: 1: 31 954482. 055 2005/12/ 3 17: 3: 14 -5680362. 733 #sec: 103 #pts: 104 2729933. 535 0. 566 0. 590 0. 812 25 1 27. 8497 -80 27 41. 7152 -24. 3934 0. 603 0. 487 0. 855 Station #: 2 File: zzyy 337 r. 05 o 2005/12/ 3 17: 4: 41 955062. 476 2005/12/ 3 17: 7: 23 -5680325. 193 #sec: 162 #pts: 163 2729813. 609 0. 248 0. 257 0. 339 25 4 23. 5041 -80 27 20. 9951 -22. 6164 0. 268 0. 250 0. 330 Station #: 3 File: zzyy 337 r. 05 o 2005/12/ 3 17: 9: 56 955528. 756 2005/12/ 3 17: 12: 31 -5680598. 380 #sec: 155 #pts: 156 2729086. 863 0. 327 0. 312 0. 359 25 9 57. 3369 -80 27 6. 1520 -22. 5733 0. 179 0. 280 0. 472 Station #: 4 File: zzyy 337 r. 05 o 2005/12/ 3 17: 14: 13 956928. 191 2005/12/ 3 17: 14: 23 -5680357. 338 #sec: 10 #pts: 11 2729097. 676 2. 125 0. 525 0. 128 25 14 57. 7295 -80 26 15. 3043 -22. 7844 0. 045 2. 181 0. 206 …
• • Station #: 1 File: zzyy 2230. 06 o 2006/ 8/11 1: 1: 0 -659935. 745 2006/ 8/11 2: 15: 0 -5328390. 873 #sec: 4440 #pts: 146 3431592. 952 0. 286 0. 484 0. 401 32 -97 1 32. 5158 3 37. 0249 143. 0226 0. 314 0. 260 0. 558 • • Station #: 2 File: zzyy 2230. 06 o 2006/ 8/11 2: 15: 30 -659935. 581 2006/ 8/11 2: 20: 0 -5328391. 041 #sec: 270 #pts: 10 3431592. 750 0. 281 0. 626 0. 424 32 15 32. 5078 -97 3 37. 0178 143. 0372 0. 296 0. 292 0. 692 • • Station #: 3 File: zzyy 2230. 06 o 2006/ 8/11 2: 33: 30 -659935. 568 2006/ 8/11 2: 38: 30 -5328391. 003 #sec: 300 #pts: 11 3431592. 792 0. 344 0. 586 0. 361 32 33 32. 5096 -97 3 37. 0175 143. 0265 0. 266 0. 365 0. 623 • • Station #: 4 File: zzyy 2230. 06 o 2006/ 8/11 2: 41: 30 -659935. 598 2006/ 8/11 2: 52: 0 -5328390. 395 #sec: 630 #pts: 22 3431592. 697 0. 488 0. 757 0. 428 32 41 32. 5175 -97 3 37. 0215 142. 4706 0. 259 0. 431 0. 861 • • Station #: 5 File: zzyy 2230. 06 o 2006/ 8/11 2: 52: 30 -659935. 747 2006/ 8/11 3: 35: 0 -5328390. 635 #sec: 2550 #pts: 86 3431592. 843 0. 421 0. 682 0. 425 32 52 32. 5170 -97 3 37. 0260 142. 7651 0. 280 0. 361 0. 784 OPUS-GIS output
OPUS Extended Output
OPUS Extended Output: Base Station Information BASE STATION INFORMATION STATION NAME: newp a 10 (Newport; Newport, Oregon USA) ANTENNA: ASH 700936 B_M S/N=CR 16197 XYZ -2548454. 0306 -3769449. 6516 4454636. 5526 MON @ 1997. 0000 (M) XYZ -0. 0067 0. 0016 -0. 0042 VEL (M/YR) NEU -0. 0000 1. 4240 MON TO ARP (M) NEU -0. 0000 0. 1089 ARP TO L 1 PHASE CENTER (M) NEU -0. 0000 0. 1274 ARP TO L 2 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 L 1 PHASE CENTER XYZ -2548454. 6967 -3769450. 5430 4454637. 5944 L 1 PHS CEN @ 2005. 1596 XYZ 0. 0000 + XYZ ADJUSTMENTS XYZ -2548454. 6967 -3769450. 5430 4454637. 5944 NEW L 1 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 L 1 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 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. Base station and antenna used Monument starting ITRF coordinates. Velocity in XYZ. NEU offsets Position offsets at mid-pt of session XYZ offsets and position ITRF XYZ at mid-pt of session ITRF lat long EH at mid-pt of session 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).
OPUS Extended Output: Remote Station Information REMOTE STATION INFORMATION STATION NAME: corv 1 ANTENNA: ASH 700936 B_M SNOW XYZ -2498422. 0030 -3802821. 7980 NEU -0. 0000 NEU 0. 0000 XYZ 0. 0000 0. 0001 XYZ -0. 0423 -0. 0643 XYZ -2498422. 0452 -3802821. 8623 4454738. 6350 -0. 0001 0. 1081 0. 1256 -0. 0001 0. 0759 4454738. 7108 S/N=UNKNOWN MON @ 2005. 1595 (M) MON TO ARP (M) ARP TO L 1 PHASE CENTER (M) ARP TO L 2 PHASE CENTER (M) MON TO ARP TO L 1 PHASE CENTER L 1 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 L 1 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.
OPUS Extended Output: Remote Station XYZ -2498422. 0452 -3802821. 8623 4454738. 7108 cont L 1 PHS CEN @ 2005. 1596 The first of 3 baselines being solved BASELINE NAME: newp corv XYZ -1. 8831 0. 9528 -0. 8303 + XYZ ADJUSTMENTS XYZ -2498423. 9283 -3802820. 9095 4454737. 8805 NEW L 1 PHS CEN @ 2005. 1596 XYZ -2498423. 8860 -3802820. 8451 4454737. 8047 NEW ARP @ 2005. 1596 XYZ -2498423. 8861 -3802820. 8452 4454737. 8047 NEW MON @ 2005. 1596 LLH 44 35 7. 92693 236 41 43. 42403 107. 2364 NEW L 1 PHS CEN @ 2005. 1596 LLH 44 35 7. 92693 236 41 43. 42403 107. 1283 NEW ARP @ 2005. 1596 LLH 44 35 7. 92693 236 41 43. 42403 107. 1284 NEW MON @ 2005. 1596 • Preliminary ITRF coordinates for the remote station incorporating velocities computed for mid-point of session in the previous section §Final positions based on this first vector. The XYZ adjustments are the difference between the initial and final positions. q. Final remote station ITRF latitude, longitude and ellipsoid height for this vector. Similar for the two remaining vectors.
OPUS Extended Output: gfiles G-FILES Axx 2005 228 B 2005 228 5 0 5 228 659 1 page 5 v 0411. 19 IGS 222 1 2 27 NGS 2006 110 IFDDFX Iant_info. 003 NGS 20060110 C 00090001 -500301992 15 333712066 21 -1012864 25 X 0595 ACORVX 0595 ANEWP D 1 2 8074967 1 3 -8657359 2 3 -8955936 Axx 2005 228 B 2005 228 5 0 5 228 659 1 page 5 v 0411. 19 IGS 222 1 2 27 NGS 2006 110 IFDDFX Iant_info. 003 NGS 20060110 C 00090002 -49126271 27 884134550 32 707170134 51 X 0595 ACORVX 0595 ACHZZ D 1 2 8158782 1 3 -8510487 2 3 -7117245 Axx 2005 228 B 2005 228 5 0 5 228 659 1 page 5 v 0411. 19 IGS 222 1 2 27 NGS 2006 110 IFDDFX Iant_info. 003 NGS 20060110 C 00090003 286169924 13 144722673 17 281156013 20 X 0595 ACORVX 0595 AP 376 D 1 2 9256643 1 3 -6469194 2 3 -7978592 Each of the three baselines has a section of A, B, I, C and D records. The specific record formats are listed in Bluebook Annex N, http: //www. ngs. noaa. gov/FGCS/Blue. Book/pdf/Annex_N. pdf. The C record contains dx, dy, dz vector components and related standard deviations. The D record contains correlations. The gfiles can be combined to do NGS-style adjustment with gfile and bfile (next slide).
OPUS Extended Output: user-constructed composite gfile Extra lines inserted to show file structure Axx 2005 228 **first session, first vector: ** B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090001 -500302065 15 333712070 20 -1012813 D 1 2 7430190 1 3 -8143037 2 3 -9277350 **first session, second vector: ** B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090002 -49126038 18 884134654 28 707169927 D 1 2 8612299 1 3 -8840443 2 3 -8385989 **first session, third vector: ** B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090003 286169906 13 144722682 18 281156043 D 1 2 8779188 1 3 -7118769 2 3 -8693288 **second session, first vector: ** B 2005 6 117 0 5 6 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090001 -500301975 13 333712099 17 -1012891 D 1 2 7783139 1 3 -8265107 2 3 -9194771 **second session, second vector: ** B 2005 6 117 0 5 6 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090002 -49126063 14 884134679 20 707169869 D 1 2 8654983 1 3 -8471449 2 3 -7513444 **second session, third vector: ** B 2005 6 117 0 5 6 11859 1 page 5 v 0601. 10 IGS 222 Iant_info. 003 NGS 20060113 C 00090003 286169960 14 144722734 18 281155938 D 1 2 9047597 1 3 -7018973 2 3 -8300669 1 2 27 NGS 2006 113 IFDDFX 24 X 0605 ACORVX 0605 ANEWP 1 2 27 NGS 2006 113 IFDDFX 35 X 0605 ACORVX 0605 ACHZZ 1 2 27 NGS 2006 113 IFDDFX 24 X 0605 ACORVX 0605 AP 376 1 2 27 NGS 2006 113 IFDDFX 20 X 1525 ACORVX 1525 ANEWP 1 2 27 NGS 2006 113 IFDDFX 26 X 1525 ACORVX 1525 ACHZZ 1 2 27 NGS 2006 113 IFDDFX 22 X 1525 ACORVX 1525 AP 376 Example of two occupations of a station. Gfile constructed by deleting all but first “Axx 2005…” lines from the extended output, then appending the two baselines’ gfiles to the first one, then adding second session results to the first session.
OPUS Extended Output: Post-fit RMS…. POST-FIT RMS BY SATELLITE VS. BASELINE OVERALL 01 04 11 13 14 16 newp-corv| 0. 013 0. 030 0. 009 0. 015 0. 022 0. 011 24 25 newp-corv| 0. 015 0. 008 20 23. . . 0. 007 NGS’ baseline processor “PAGES” (Program for the Adjustment of GPS Ephemerides) develops statistics such as the above to aid in analyzing solution quality. In the spirit of automated processing that is fundamental to OPUS, there is no option to disable specific satellites. Each baseline has a section like the one shown above.
OPUS Extended Output: Observations summary OBS BY SATELLITE VS. BASELINE newp-corv| chzz-corv| p 376 -corv| OVERALL 1482 24 231 OVERALL 1260 24 218 OVERALL 1486 24 220 01 239 25 239 01 128 25 220 01 239 25 239 04 57 11 158 13 127 14 32 16 162 20. . . 23 237 04 65 11 149 13 125 14. . . 16 117 20. . . 23 238 04 67 11 156 13 129 14 35 16 163 20. . . 23 238 Each baseline has a summary of the observations received from each satellite. OBS USED: 4228 / 4314 : 98% As discussed on slides 14 & 15 (Reading OPUS output, Guidelines for Good Solution), the Standard Output summarizes the total percent of observations used over all three baselines.
OPUS Extended Output: Covariance Matrices Covariance Matrix for the xyz OPUS Position (meters 2). 0. 0000024956 0. 0000002586 -0. 0000003699 0. 0000002586 0. 0000038978 -0. 0000004229 -0. 0000003699 -0. 0000004229 0. 0000080578 Covariance Matrix for the enu OPUS Position (meters 2). 0. 0000026809 -0. 0000004333 0. 0000003326 -0. 0000004333 0. 0000053747 0. 0000021840 0. 0000003326 0. 0000021840 0. 0000063955 Horizontal network accuracy = Vertical network accuracy = 0. 00500 meters. 0. 00496 meters. Additional statistics developed by PAGES for use in commercial adjustment software: Diagonal elements: Variance of x: 0. 0000024956 Variance of y: 0. 0000038978 Variance of z: 0. 0000080578 Off-diagonal elements: Covariance of x-y: 0. 000002586 Covariance of x-z: -0. 0000003699 Covariance of y-z: -0. 0000004229 Similar for enu. Estimates of network accuracy. These may be optimistic here, given that peak-peak errors are in the 1 -3 cm range.
OPUS Extended Output: NAD 83 quantities Derivation of NAD 83 vector components Position of reference station ARP in NAD_83(CORS 96)(EPOCH: 2002. 0000). Xa(m) Ya(m) Za(m) NEWP -2548453. 96133 -3769451. 68039 4454637. 42077 2002. 00 CHZZ -2503335. 82617 -3714408. 62715 4525454. 72998 2002. 00 P 376 -2469806. 16816 -3788349. 79220 4482853. 31622 2002. 00 Position of reference station monument in NAD_83(CORS 96)(EPOCH: 2002. 0000). Xr(m) Yr(m) Zr(m) NEWP -2548453. 39333 -3769450. 84019 4454636. 42117 2002. 00 CHZZ -2503335. 79517 -3714408. 58125 4525454. 67368 2002. 00 P 376 -2469806. 16496 -3788349. 78730 4482853. 31032 2002. 00 Velocity of reference station monument in NAD_83(CORS 96)(EPOCH: 2002. 0000). Vx (m/yr) Vy (m/yr) Vz (m/yr) NEWP 0. 01180 0. 00240 0. 00600 CHZZ 0. 00550 -0. 00410 0. 00200 P 376 0. 00440 0. 00380 0. 00560 Vectors from unknown station monument to reference station monument in NAD_83(CORS 96)(EPOCH: 2002. 0000). Xr-X= DX(m) Yr-Y= DY(m) Zr-Z= DZ(m) NEWP -50030. 22533 33371. 21181 -101. 27783 2002. 00 CHZZ -4912. 62717 88413. 47075 70716. 97468 2002. 00 P 376 28617. 00304 14472. 26470 28115. 61132 2002. 00 The above quantities are derived by transformation from similar ITRF quantities.
OPUS Extended Output: SPC—Disclaimer--End STATE PLANE COORDINATES - International Foot SPC (3601 OR N) Northing (Y) [feet] 347675. 709 Easting (X) [feet] 7471572. 785 Convergence [degrees] -1. 98897497 Point Scale 0. 99994603 Combined Factor 0. 99992918 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. State Plane Coordinate quantities Disclaimer End of OPUS Extended Output. Next: example of adjusting several sessions submitted to OPUS for the same station
Files for sample adjustment Serfil: Upper part of skeleton Bfile (no *25*, *27*, *70*, *72* records): 000010*OR*HZTLOBS NGS NATIONAL GEODETIC SURVEY 000020*10*TEST OPUS SOLUTIONS TO CORVALLIS CORS 000030*12*200502 JROJEFF OLSEN 000040*13*NORTH AMERICAN DATUM-83 GRS-80 63781370002982572221 *80*0001 NEWPORT CORS ARP 44350607244 N 124034273663 W *86*0001 N 88 A A *80*0002 CAPE MEARS CORS ARP 45291143774 N 123584118743 W *86*0002 N 88 A A (*80* and *86* records for two stations not shown) 025640*OR* 20060112 NEWP CHZZ P 376 CORV DDSN ORAA 0001 0002 0003 0009 0005 Afile: CC 0001 DD 3 II 599999 MM 3 NYfrebbk 44350607244 N 124034273663 W 20780 E (Coordinates and EH for NEWP constrained) Upper Part of composite Gfile. Four 2 -hr sessions for CORV at different times of 2005 were sent to OPUS. Vectors for one of the four sessions shown. Axx 2005 228 B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 1 2 27 NGS 2006 113 IFDDFX Iant_info. 003 NGS 20060113 C 00090001 -500302065 15 333712070 20 -1012813 24 X 0605 ACORVX 0605 ANEWP D 1 2 7430190 1 3 -8143037 2 3 -9277350 B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 1 2 27 NGS 2006 113 IFDDFX Iant_info. 003 NGS 20060113 C 00090002 -49126038 18 884134654 28 707169927 35 X 0605 ACORVX 0605 ACHZZ D 1 2 8612299 1 3 -8840443 2 3 -8385989 B 2005 3 117 0 5 3 11859 1 page 5 v 0601. 10 IGS 222 1 2 27 NGS 2006 113 IFDDFX Iant_info. 003 NGS 20060113 C 00090003 286169906 13 144722682 18 281156043 24 X 0605 ACORVX 0605 AP 376 D 1 2 8779188 1 3 -7118769 2 3 -8693288
Adjustment statistics NATIONAL GEODETIC SURVEY PROGRAM ADJUST PAGE 15 ADJUSTMENT PROGRAM VERSION NORTH EAST UP N CONTRIB. 11 11 11 DEGREES OF FREEDOM VARIANCE SUM STD. DEV. OF UNIT WEIGHT VARIANCE OF UNIT WEIGHT RMS RESIDUAL 0. 003 0. 002 0. 008 = = 4. 30 MEAN ABS RESIDUAL 0. 002 (METERS) 0. 001 (METERS) 0. 006 (METERS) 24 234. 6 3. 126 9. 77
Output Bfile from free adjustment: 000010*CO*HZTLOBS NGS NATIONAL GEODETIC SURVEY 000020*10*TEST OPUS SOLUTIONS TO CORVALLIS CORS 000030*12*200502 JROJEFF OLSEN 000040*13*NORTH AMERICAN DATUM-83 GRS-80 63781370002982572221 *80*0001 NEWPORT CORS ARP 44350607244 N 124034273663 W *86*0001 N 88 20780 A A *80*0002 CAPE MEARS CORS ARP 45291143836 N 123584118793 W *86*0002 N 88 51097 A A *80*0003 EOLARESVR OR 2004 CORS ARP 44562831336 N 123060810210 W *86*0003 N 88 181245 A A *80*0009 CORV CORS ARP BY OPUS 44350791052 N 123181651975 W *86*0009 N 88 107516 A A *80*0005 DDSN 43070763047 N 123143921370 W *86*0005 N 88 953585 A A 025640*AL* 20060112 (No orthometric or geoid heights computed in this example) ORAA ORAA (Pub =. 91082, . 51926) (Pub = 107. 514)
Example of using HTDP from NGS Tool Kit NEWP position computed for day of year 059, 2005
