I was staking out design points in JMT using my Triumph 2. I’m using Ntrip for correction. I discovered that it’s staking design points 0.4’ too far east. The northing is right on. I’m using an android tablet with JMT v3.4.0. Is there a setting that I’m not finding somewhere or is something wrong in JMT? It stakes survey points just fine.
Easting Error in Stakeout with JMT
- Thread starter Dennis M
- Start date
Nate The Surveyor
Well-Known Member
Could you have your tilt sensor on, and in a mal-adjusted state?
I found my tilt sensor was on, when i did not turn it on, (i think it came from an update), recently. It was not off much.
But anyway, I'd like it if there was some sort of warning, when tilt is on. Perhaps a different color accept button, or a splash on the screen, that says TILT SENSOR ON, during the last screen shots.
It's just my thoughts.
I found my tilt sensor was on, when i did not turn it on, (i think it came from an update), recently. It was not off much.
But anyway, I'd like it if there was some sort of warning, when tilt is on. Perhaps a different color accept button, or a splash on the screen, that says TILT SENSOR ON, during the last screen shots.
It's just my thoughts.
Grid/Ground issue?
Thanks for responding! I checked the tilt sensor and it’s off. I’m also using a low distortion coordinate system so grid/ground is negligible. I would also think both of those would affect Survey points as well. It only applies the easting shift on the stakeout of design points. I thought maybe there was a horizontal offset setting somewhere that I cannot find.
There are no plain offsets in the J-Mobile now. Do you use NAD83 base? In that case false check that Reference Frame set to NAD83 instead of WGS84 in Survey settings or in Start Rover.
It would be nice to make a survey for OPUS and compare it with the RTK results.
It would be nice to make a survey for OPUS and compare it with the RTK results.
May be the VRS transmit corrections in RTCM3 messages and JMobile for iOS doesn't handle them? Could you ask your VRS provider about this?
Thanks Yuri, JMT correction shows it's receiving data. Missouri uses the Trimble Pivot Platform and say its provided through Trimble. Someone with more knowledge of Trimble Pivot Platform will have to ask the proper questions. The vendor who sold the system told me it would work. I used the VRS_RTCM3.1 Mount point. I think someone with JAVAD should be able to give me a definitive answer on this issue. It has already cost me time I guess I'll just have to send the instrument back.
Ken, Mobile (as well as LS) can handle coordinate system corrections from RTCM3 messages and correct coordinates. The settings is Reference Frame that can be set to RTCM3. But correct coordinate system should be loaded from GNSS receiver after it have read the corrections from the VRS.
Yuri, I appreciate your help. Here is what I'm trying.
What can I try? The correction screen always shows correction as -1.
| {screen Configure NTrip } | ||||
| (4) | configuration Name : MOW3 | |||
| (5) | internet From: the android device | |||
| (6) | IP: 168.166.125.30 | |||
| (7) | PORT: 2101 | |||
| (8) | Mount point:VRS_RTCM31 | |||
| (9) | Login: ****** | |||
| (10) | Password:****** | |||
| (11) | GGA: is checked | |||
| 12) | Correction Type: rtcm3 | |||
| (13) | Correction Period: 1 Hz | |||
| (14) | AIM aux Port: dev/ser/b | |||
| (15)a | Ref frame: | NAD83(2011) | works but point are 0.4ft east | |
| (16)a | not shown | |||
| (15)b | Ref frame: | RTCM3 | appears to work but flashs msgbox "RTCM3 Coordinate system is differrent" status bar grayed solution dot, engines show fix | |
| (16)b | Coordinate System: | NAD83(2011) Geodial | ||
| (15)c | Ref frame: | RTCM3 | appears to work but flashs msgbox RTCM3 Coordinate system is differrent | |
| (16)c | Coordinate System: | NAD83 2011 Missouri West Geodial | pressing read from receiver shows msg :Can not read from receiver" |
What can I try? The correction screen always shows correction as -1.
Ken,
Could you try work with this VRS with Triumph-LS?
Could you provide us an access to VRS network to check messages and compatibilities with it or could collect a jps file with Trium-h-LS (it includes corrections from VRS) and send us.
Best regards, Yuri
PS. By the way - do you use iOS version of Javad Mobile Tools?
Could you try work with this VRS with Triumph-LS?
Could you provide us an access to VRS network to check messages and compatibilities with it or could collect a jps file with Trium-h-LS (it includes corrections from VRS) and send us.
Best regards, Yuri
PS. By the way - do you use iOS version of Javad Mobile Tools?
Yuri
I don't know if I can find an LS, I will try. The VRS Network is here http://gpsweb3.modot.mo.gov/ . It is free and I would assume they would issue you a password for trouble shooting the Javad Receivers. If you have trouble shooting software that I could ping the system with and capture signal I'd be glad to do that. I am doing more some static test.
Thanks
I don't know if I can find an LS, I will try. The VRS Network is here http://gpsweb3.modot.mo.gov/ . It is free and I would assume they would issue you a password for trouble shooting the Javad Receivers. If you have trouble shooting software that I could ping the system with and capture signal I'd be glad to do that. I am doing more some static test.
Thanks
Firmware group analysed the network. It doesn't transmit coordinate system corrections our receiver uses. So you don't set RTCM3 as Reference Frame. WGS84 or a NAD83 should be set. Which coordinate system do you use?
Adam, Nate or other PLS could you try to verify work of our equipment Triumph-LS or JMobile, doesn't matter, with this VRS on your sites or an OPUS position.
Adam, Nate or other PLS could you try to verify work of our equipment Triumph-LS or JMobile, doesn't matter, with this VRS on your sites or an OPUS position.
The NCGS RTN has been down since Friday. I will test it as soon as it comes back online Yuri.
Adam, is this the same network? Because today firmware group was able to load data from it.
I spoke with the rtn coordinator and Its still down with no known time for it to be working again Yuri.
Adam, then you will be able to compare a position, please send us the JPS file from LS with corrections inside.