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K.I.S.S. GPS hello. joe.evjen@noaa.gov. WHAT IS OPUS?. O n-line P ositioning U ser S ervice. Fast & easy access to the NSRS ( National Spatial Reference System) for GPS users. Why do we need OPUS?.

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k i s s gps hello

K.I.S.S. GPS hello.

joe.evjen@noaa.gov

what is opus
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
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
slide5

You’ve got mail!

OPUS solution

slide6

National CORS

CORS Network: Where We are Today

  • 1191 National CORS
  • 190+ Cooperative CORS
how does opus compute your position
How does OPUS compute your position?

3 single baselines computed

solution 2

CORS solution 1

solution 3

3 positions averaged —

simple mean (equal weights)

how does opus pick base stations
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)

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

HOW IS THE ANTENNA HEIGHT MEASURED?
why do i need the antenna type

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

how can i improve my results
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)
slide13

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

allowable data formats
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”
slide15

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

slide16

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

slide17

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

reading opus output

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.
reading opus output con t
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
guidelines for good solution
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.
reading opus output con t solution coordinates
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
how does opus estimate errors peak to peak
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

slide23

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

opus output con t grid coordinates
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)
reading opus output control
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
opus in the works
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/

slide28

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>

opus concept
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

slide30

Z 125

1935

control station requirements

Stable

Permanent

Unique

Recoverable

Safe

US COAST & GEODETIC SURVEY

--|--

control station monument

gps data requirements
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

metadata requirements
metadata requirements

observationnotes

control station description *

control stationphoto *

antenna type, height

*optional for “existing” stations.

Simplified bluebooking

slide35

OPUS-Projects

In the usual OPUS procedure, the user submits his GPS data and receives a solution via email.

OPUS

GPS DATA

USER

SOLUTION

slide36

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

from the field point of view
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
from the project managers point of view
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
opus rs rapid static
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
slide40

GIS Works Here

# of People Who Care

NGS Works Here

mm

cm

dm

m

dam

hm

km

Position Accuracy

opus gis
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
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
slide43

Effect of Differential Positioning

N

N

W

E

W

E

S

S

Point positioning

Differential Positioning

slide44

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

slide45

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

opus gis output
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
opus extended output base station information

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).

opus extended output remote station information
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.

opus extended output remote station cont
OPUS Extended Output: Remote Station cont

The first of 3 baselines being solved

XYZ -2498422.0452 -3802821.8623 4454738.7108 L1 PHS CEN @ 2005.1596

BASELINE NAME: newp corv

XYZ -1.8831 0.9528 -0.8303 + XYZ ADJUSTMENTS

XYZ -2498423.9283 -3802820.9095 4454737.8805 NEW L1 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 L1 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.
  • Final remote station ITRF latitude, longitude and ellipsoid height for this vector. Similar for the two remaining vectors.
opus extended output gfiles
OPUS Extended Output: gfiles

G-FILES

Axx2005 228 5 228

B2005 228 5 0 5 228 659 1 page5 v0411.19IGS 222 1 2 27NGS 2006 110IFDDFX

Iant_info.003 NGS 20060110

C00090001 -500301992 15 333712066 21 -1012864 25 X0595ACORVX0595ANEWP

D 1 2 8074967 1 3 -8657359 2 3 -8955936

Axx2005 228 5 228

B2005 228 5 0 5 228 659 1 page5 v0411.19IGS 222 1 2 27NGS 2006 110IFDDFX

Iant_info.003 NGS 20060110

C00090002 -49126271 27 884134550 32 707170134 51 X0595ACORVX0595ACHZZ

D 1 2 8158782 1 3 -8510487 2 3 -7117245

Axx2005 228 5 228

B2005 228 5 0 5 228 659 1 page5 v0411.19IGS 222 1 2 27NGS 2006 110IFDDFX

Iant_info.003 NGS 20060110

C00090003 286169924 13 144722673 17 281156013 20 X0595ACORVX0595AP376

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/BlueBook/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
OPUS Extended Output: user-constructed composite gfile

Extra lines inserted to show file structure

Axx2005 228 5 228

**first session, first vector:**

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090001 -500302065 15 333712070 20 -1012813 24 X0605ACORVX0605ANEWP

D 1 2 7430190 1 3 -8143037 2 3 -9277350

**first session, second vector:**

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090002 -49126038 18 884134654 28 707169927 35 X0605ACORVX0605ACHZZ

D 1 2 8612299 1 3 -8840443 2 3 -8385989

**first session, third vector:**

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090003 286169906 13 144722682 18 281156043 24 X0605ACORVX0605AP376

D 1 2 8779188 1 3 -7118769 2 3 -8693288

**second session, first vector:**

B2005 6 117 0 5 6 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090001 -500301975 13 333712099 17 -1012891 20 X1525ACORVX1525ANEWP

D 1 2 7783139 1 3 -8265107 2 3 -9194771

**second session, second vector:**

B2005 6 117 0 5 6 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090002 -49126063 14 884134679 20 707169869 26 X1525ACORVX1525ACHZZ

D 1 2 8654983 1 3 -8471449 2 3 -7513444

**second session, third vector:**

B2005 6 117 0 5 6 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090003 286169960 14 144722734 18 281155938 22 X1525ACORVX1525AP376

D 1 2 9047597 1 3 -7018973 2 3 -8300669

Example of two occupations of a station. Gfile constructed by deleting all but first “Axx2005…” 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
OPUS Extended Output: Post-fit RMS….

POST-FIT RMS BY SATELLITE VS. BASELINE

OVERALL 01 04 11 13 14 16 20 23

newp-corv| 0.013 0.013 0.030 0.009 0.015 0.022 0.011 ... 0.007

24 25

newp-corv| 0.015 0.008

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
OPUS Extended Output: Observations summary

OBS BY SATELLITE VS. BASELINE

OVERALL 01 04 11 13 14 16 20 23

newp-corv| 1482 239 57 158 127 32 162 ... 237

24 25

newp-corv| 231 239

OVERALL 01 04 11 13 14 16 20 23

chzz-corv| 1260 128 65 149 125 ... 117 ... 238

24 25

chzz-corv| 218 220

OVERALL 01 04 11 13 14 16 20 23

p376-corv| 1486 239 67 156 129 35 163 ... 238

24 25

p376-corv| 220 239

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
OPUS Extended Output: Covariance Matrices

Covariance Matrix for the xyz OPUS Position (meters2).

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 (meters2).

0.0000026809 -0.0000004333 0.0000003326

-0.0000004333 0.0000053747 0.0000021840

0.0000003326 0.0000021840 0.0000063955

Horizontal network accuracy = 0.00500 meters.

Vertical network accuracy = 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
OPUS Extended Output: NAD 83 quantities

Derivation of NAD 83 vector components

Position of reference station ARP in NAD_83(CORS96)(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

P376 -2469806.16816 -3788349.79220 4482853.31622 2002.00

Position of reference station monument in NAD_83(CORS96)(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

P376 -2469806.16496 -3788349.78730 4482853.31032 2002.00

Velocity of reference station monument in NAD_83(CORS96)(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

P376 0.00440 0.00380 0.00560

Vectors from unknown station monument to reference station monument

in NAD_83(CORS96)(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

P376 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
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:

NEWP 0001

CHZZ 0002

P376 0003

CORV 0009

DDSN 0005

Files for sample adjustment

Upper part of skeleton Bfile (no *25*, *27*, *70*, *72* records):

000010*OR*HZTLOBS NGS NATIONAL GEODETIC SURVEY 20060112

000020*10*TEST OPUS SOLUTIONS TO CORVALLIS CORS

000030*12*200502200502JROJEFF OLSEN

000040*13*NORTH AMERICAN DATUM-83 GRS-80 63781370002982572221

*80*0001NEWPORT CORS ARP 44350607244N124034273663W ORAA

*86*0001 N88 A A

*80*0002CAPE MEARS CORS ARP 45291143774N123584118743W ORAA

*86*0002 N88 A A

(*80* and *86* records for two stations not shown)

025640*OR*

Afile:

CC 0001 44350607244N124034273663W 20780E

DD3

II 599999 (Coordinates and EH for NEWP constrained)

MM3NYfrebbk

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.

Axx2005 228 5 228

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090001 -500302065 15 333712070 20 -1012813 24 X0605ACORVX0605ANEWP

D 1 2 7430190 1 3 -8143037 2 3 -9277350

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090002 -49126038 18 884134654 28 707169927 35 X0605ACORVX0605ACHZZ

D 1 2 8612299 1 3 -8840443 2 3 -8385989

B2005 3 117 0 5 3 11859 1 page5 v0601.10IGS 222 1 2 27NGS 2006 113IFDDFX

Iant_info.003 NGS 20060113

C00090003 286169906 13 144722682 18 281156043 24 X0605ACORVX0605AP376

D 1 2 8779188 1 3 -7118769 2 3 -8693288

adjustment statistics
Adjustment statistics

NATIONAL GEODETIC SURVEY

PROGRAM ADJUST ADJUSTMENT PROGRAM PAGE 15

VERSION 4.30

N RMS MEAN ABS

CONTRIB. RESIDUAL RESIDUAL

NORTH 11 0.003 0.002 (METERS)

EAST 11 0.002 0.001 (METERS)

UP 11 0.008 0.006 (METERS)

DEGREES OF FREEDOM = 24

VARIANCE SUM = 234.6

STD.DEV.OF UNIT WEIGHT = 3.126

VARIANCE OF UNIT WEIGHT = 9.77

output bfile
Output Bfile

Bfile from free adjustment:

000010*CO*HZTLOBS NGS NATIONAL GEODETIC SURVEY 20060112

000020*10*TEST OPUS SOLUTIONS TO CORVALLIS CORS

000030*12*200502200502JROJEFF OLSEN

000040*13*NORTH AMERICAN DATUM-83 GRS-80 63781370002982572221

*80*0001NEWPORT CORS ARP 44350607244N124034273663W ORAA

*86*0001 N88 20780A A

*80*0002CAPE MEARS CORS ARP 45291143836N123584118793W ORAA

*86*0002 N88 51097A A

*80*0003EOLARESVR OR2004 CORS ARP 44562831336N123060810210W ORAA

*86*0003 N88 181245A A

*80*0009CORV CORS ARP BY OPUS 44350791052N123181651975W ORAA (Pub = .91082, .51926)

*86*0009 N88 107516A A (Pub = 107.514)

*80*0005DDSN 43070763047N123143921370W ORAA

*86*0005 N88 953585A A

025640*AL*

(No orthometric or geoid heights computed in this example)

example of using htdp from ngs tool kit
Example of using HTDP from NGS Tool Kit

NEWP position computed for day of year 059, 2005