DPOS solution documentation

[Sean Joyce]

I used DPOS for a project yesterday and was very impressed.
Solution came back and my points were corrected in minutes.
DPOS will be a real time saver for me.
Static data could be submitted through a public access wireless network during a coffee break
and the day finished with corrected data.

I typically request an extended output from OPUS and print the documented solution and place in my job file.
Is it or will it be possible? to receive or access the documented solution from DPOS?

 

[Sean Joyce]

"Static data could be submitted through a public access wireless network during a coffee break
and the day finished with corrected data."

Given CORS data availability of course.

 

[Alexey Razumovsky]

I used DPOS for a project yesterday and was very impressed.
Solution came back and my points were corrected in minutes.
DPOS will be a real time saver for me.
Static data could be submitted through a public access wireless network during a coffee break
and the day finished with corrected data.

I typically request an extended output from OPUS and print the documented solution and place in my job file.
Is it or will it be possible? to receive or access the documented solution from DPOS?

Certainly we could output some kind of extended report. Not similar to OPUS one because we aren't owner of CORS network and have no access to all documentation. What items from OPUS extended report are the most important for you?

 

[Shawn Billings]

Alexey,
I would think it good to provide the full coordinates of the CORS sites used (along with the reference frame of those coordinates) and the vectors from the CORS to the point.

Also, as lazy as this sounds, one reason that many people ask for the extended output from OPUS is that the extended output puts the State Plane coordinates in feet (international or US, based on the State's legislated definition of the foot). Perhaps, when you include the prompt for user selected State Plane, you could also prompt for desired secondary unit and provide the UTM and State Plane coordinate in this secondary unit as well as in meters.

 

[Alexey Razumovsky]

Alexey,
I would think it good to provide the full coordinates of the CORS sites used (along with the reference frame of those coordinates) and the vectors from the CORS to the point.

Also, as lazy as this sounds, one reason that many people ask for the extended output from OPUS is that the extended output puts the State Plane coordinates in feet (international or US, based on the State's legislated definition of the foot). Perhaps, when you include the prompt for user selected State Plane, you could also prompt for desired secondary unit and provide the UTM and State Plane coordinate in this secondary unit as well as in meters.

I understood. We will try to implement this.

 

[Kelly Bellis]

Also, as lazy as this sounds, one reason that many people ask for the extended output from OPUS is that the extended output puts the State Plane coordinates in feet (international or US, based on the State's legislated definition of the foot).

Shawn, I can't speak to your locality, but in my area (at least), and the main reason I go with the extended version of reports from OPUS, has to do with gravity, the recent gravity surveys of the northeast, the hybrid geoid GEOID14x (earlier), and now more recently simply being referred to as orthometric heights above the Future Geopotential Datum or so-called [PROTOTYPE]. This is not for your LOMA app or other critical use of ortho heights, but very interesting to compare; for example:

In Maine...

ORTHO HGT: 39.743(m) 0.049(m) [NAVD88 (Computed using GEOID12A)]

vs.

APPROX ORTHO HGT: 39.385 (m) [PROTOTYPE (Computed using USGG2012,GRS80,IGS08)]

In Florida...

ORTHO HGT: 2.481(m) 0.100(m) [NAVD88 (Computed using GEOID12A)]

vs.

APPROX ORTHO HGT: 2.387 (m) [PROTOTYPE (Computed using USGG2012,GRS80,IGS08)]

Whenever the new height system is finally implemented (2022?), static vertical control monuments will become symbols of an era prior to the advance of GNSS.

 

[Sean Joyce]

Certainly we could output some kind of extended report. Not similar to OPUS one because we aren't owner of CORS network and have no access to all documentation. What items from OPUS extended report are the most important for you?

Alexy;
Does Justin generate some type of report on how the point solution was determined?
from the Javad website - "Using the Javad GNSS, Data Processing Online Service (DPOS), which is powered by the proven Javad GNSS Justin processing engine"
If a report was to be designed, the OPUS solution report would be a good one to mimic.
The report is needed to have a record of the basis of the solution and related surveys, (might have legal implications) to be able to troubleshoot if need be, and to be able to reproduce the same results in the future.
Thank you for your attention. Sorry for my late reply.

 

[Shawn Billings]

Hi Sean,
Not sure if you've given the DPOS web service a try http://geo.javad.com/dpos but the report returned is very similar to OPUS. It would be good to get this same text file downloaded to the LS. Here is an example of a return I got last week using DPOS online:

DPOS REPORT
JAVAD POST-PROCESSING SERVICE
=============================

USER: DATE: 16.04.2015
FILE: Base1_111511.jps TIME: 02:42:59 PM GPS time

SOFTWARE: DPOS START: 2015/04/15 05:15:29.000 PM
EPHEMERIS: brdc STOP: 2015/04/15 07:33:18.000 PM
OBS USED: 11296 / 11335 Geometry factor: 0.8
ANT NAME: JAV_TRIUMPH-1 NONE # FIXED AMB: Yes
ANT HEIGHT: Vertical(SHMP) - 1.731 meters OVERALL RMS: 0.011 meters

REF FRAME: NAD83(2011)(EPOCH:2010.0000) IGS08 (EPOCH:2015.2863)
X: -464578.273(m) 0.007(m) -464579.066(m) 0.007(m)
Y: -5368372.633(m) 0.007(m) -5368371.187(m) 0.007(m)
Z: 3401280.489(m) 0.006(m) 3401280.323(m) 0.006(m)
LAT: N 32 26 05.38942 0.007(m) N 32 26 05.40878 0.007(m)
E LON:E 265 03 14.23194 0.003(m) E 265 03 14.19693 0.003(m)
W LON: W 94 56 45.76806 0.003(m) W 94 56 45.80307 0.003(m)
EL HGT: 101.996(m) 0.008(m) 100.748(m) 0.008(m)
ORTHO HGT: 128.390(m) 0.008(m) [NAVD88 (Computed using GEOID12A)]
UTM COORDINATES STATE PLANE COORDINATES
UTM (Zone 15) SPC (NAD83(2011) /4202 Texas North Central)
Northing (Y) [meters] 3590301.850 2090835.108
Easting (X) [meters] 317043.218 934142.574
US NATIONAL GRID DESIGNATOR: NONE

BASE STATIONS USED
PID DESIGNATION LATITUDE LONGITUDE DISTANCE(m)
NONE TXMA(CORS) N 32 32 07.125 W 94 17 19.0825 62788.9
NONE TXMV(CORS) N 33 09 42.588 W 95 13 15.8890 84641.3
NONE TXNC(CORS) N 31 40 03.999 W 94 40 08.3868 88990.7
NONE TXRU(CORS) N 31 47 05.631 W 95 07 34.1884 74049.0
NONE TXTY(CORS) N 32 14 58.597 W 95 23 36.9678 46873.6

 

[Sean Joyce]

Shawn thanks for pointing that out.
I haven't used the web service and mobile tools yet.
Maybe instead of DPOS uploading a text file report to the LS along with the solution, the DPOS report could be generated and sent to an email account, whatever would be less complicated.

 

[Bob Farley]

Good Morning,
I have been using the DPOS for a few months and agree there needs to be a way to document and put in the job folder. Mississippi requires
the station(s) used for the observation, the convergence angle, the elevation factor, and the scale factor (or a combined factor) to be on the face of the plat. Granted, I have not used the web based service yet, but will shortly on the job I did yesterday. On another note, DPOS does not work for me on the same day as the traverse, I have to wait for the following morning for a solution.

 

[Alexey Razumovsky]

Good Morning,
I have been using the DPOS for a few months and agree there needs to be a way to document and put in the job folder. Mississippi requires
the station(s) used for the observation, the convergence angle, the elevation factor, and the scale factor (or a combined factor) to be on the face of the plat. Granted, I have not used the web based service yet, but will shortly on the job I did yesterday. On another note, DPOS does not work for me on the same day as the traverse, I have to wait for the following morning for a solution.

Does OPUS answer faster?

 

[Shawn Billings]

OPUS static can often provide results at the top of the hour after ending a session. OPUS RS often requires waiting until the next day.

This probably varies around the US depending on the CORS.

 

[Alexey Razumovsky]

OPUS static can often provide results at the top of the hour after ending a session. OPUS RS often requires waiting until the next day.

This probably varies around the US depending on the CORS.

Unfortunately DPOS has not direct access to CORS data repository. It downloads data from regular ftp. Usually it happens next day morning. I see one way only to make DPOS faster. Redirect data seaching engine to independent reference network. We are starting deployment such networks in Ural disrict in Russia and in Israel. New reference data comes hourly.

 

[Kelly Bellis]

Unfortunately DPOS has not direct access to CORS data repository. It downloads data from regular ftp. Usually it happens next day morning. I see one way only to make DPOS faster. Redirect data seaching engine to independent reference network. We are starting deployment such networks in Ural disrict in Russia and in Israel. New reference data comes hourly.

Now you're talking! It would be very groovy if our Maine Department of Transportation might consider this.

 

[Sdrake14]

Can Anyone tell me why a recent DPOS solution being very different possibly due to development is missing the SPC83 solution in Grid coordinates and in place I see a WGS84 geographic coordinate?
Thanks

 

[Alexey Razumovsky]

Can Anyone tell me why a recent DPOS solution being very different possibly due to development is missing the SPC83 solution in Grid coordinates and in place I see a WGS84 geographic coordinate?
Thanks

Hi, share the file with us. We can look at it.

 

[Bruce Dawson]

Used the DPOS submittal and adjustment option in JField for the first time yesterday on a real job. Really nice! I too would like to see some kind of adjustment summary report. Is that available for non-website submitals like mine?

 

[Yuri Noyanov]

For non-website you can use Javad Mobile Tools for iPhone or Android devices. It stores DPOS report to see at any time. For JField application we store all the information inside project for processed base point. Then you click it you can see picture with original coordinates, offsets etc. We are going to add view report itself as well in a next version of JField.

 

[Bruce Dawson]

Thanks Yuri, I am looking at the report for my base point now and see the shift from the autonomous position to the adjusted position. I would like to know more, for instance what CORS stations it used, etc.

 

[Shawn Billings]

On the DPOS screen, press the light blue field on the right. Additional statics are shown, including CORS used.