Mapping and GIS Solutions Community

I have been using a Trimble 7x unit with Esri ArcPad for several years.  I have been able to get submeter accuracy with the built in internal antenna under pretty thick canopy cover with just SBAS corrections.  We recently purchased a Trimble TDC 650 unit and had issues with ESRI Field Maps, so we switched over to TerraFlex and still seem to be having difficulty getting SBAS corrections to get submeter accuracy under tree canopy.

Anyone else having these issues?  Just curious if the Trimble 7x anenna is/was better than the TDC 650 antenna.

Thanks

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Barry Blackwell
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I have been using a Trimble 7x unit with Esri ArcPad for several years.  I have been able to get submeter accuracy with the built in internal antenna under pretty thick canopy cover with just SBAS corrections.  We recently purchased a Trimble TDC 650 unit and had issues with ESRI Field Maps, so we switched over to TerraFlex and still seem to be having difficulty getting SBAS corrections to get submeter accuracy under tree canopy.

Anyone else having these issues?  Just curious if the Trimble 7x anenna is/was better than the TDC 650 antenna.

Thanks

I don't work for Trimble, but have experience with both and I fully agree with the USFS 95% accuracy tests you can find online between the TDC600 / Geo7x.   No comparison at all.  If you have the floodlight / HSTAR version of Geo7x, the best GIS mapping handheld ever built by anyone, your never going to get submeter under any circumstance with the TDC650 using WAAS.     Now, the poster mentioned he used arcpad, so that again would not have any post-processing capacity, unlike say TerraSync.  but the SBAS chipset in the Geo7x was just better and don't forget the antenna size.   All GNSS devices fail under canopy.  Any manufacturer states 68% confidence statistics for the open sky.   Here is USFS link.  USDA Forest Service Global Positioning System: MTDC Accuracy Reports

I have been using a Trimble 7x unit with Esri ArcPad for several years.  I have been able to get submeter accuracy with the built in internal antenna under pretty thick canopy cover with just SBAS corrections.  We recently purchased a Trimble TDC 650 unit and had issues with ESRI Field Maps, so we switched over to TerraFlex and still seem to be having difficulty getting SBAS corrections to get submeter accuracy under tree canopy.

Anyone else having these issues?  Just curious if the Trimble 7x anenna is/was better than the TDC 650 antenna.

Thanks

Well that isn't good news.  You would think they would make the TDC 650 better than the Geo7x. I hate how the Geo7x is being pushed out.

I don't work for Trimble, but have experience with both and I fully agree with the USFS 95% accuracy tests you can find online between the TDC600 / Geo7x.   No comparison at all.  If you have the floodlight / HSTAR version of Geo7x, the best GIS mapping handheld ever built by anyone, your never going to get submeter under any circumstance with the TDC650 using WAAS.     Now, the poster mentioned he used arcpad, so that again would not have any post-processing capacity, unlike say TerraSync.  but the SBAS chipset in the Geo7x was just better and don't forget the antenna size.   All GNSS devices fail under canopy.  Any manufacturer states 68% confidence statistics for the open sky.   Here is USFS link.  USDA Forest Service Global Positioning System: MTDC Accuracy Reports

I have been using a Trimble 7x unit with Esri ArcPad for several years.  I have been able to get submeter accuracy with the built in internal antenna under pretty thick canopy cover with just SBAS corrections.  We recently purchased a Trimble TDC 650 unit and had issues with ESRI Field Maps, so we switched over to TerraFlex and still seem to be having difficulty getting SBAS corrections to get submeter accuracy under tree canopy.

Anyone else having these issues?  Just curious if the Trimble 7x anenna is/was better than the TDC 650 antenna.

Thanks

Well that isn't good news.  You would think they would make the TDC 650 better than the Geo7x. I hate how the Geo7x is being pushed out.

I don't work for Trimble, but have experience with both and I fully agree with the USFS 95% accuracy tests you can find online between the TDC600 / Geo7x.   No comparison at all.  If you have the floodlight / HSTAR version of Geo7x, the best GIS mapping handheld ever built by anyone, your never going to get submeter under any circumstance with the TDC650 using WAAS.     Now, the poster mentioned he used arcpad, so that again would not have any post-processing capacity, unlike say TerraSync.  but the SBAS chipset in the Geo7x was just better and don't forget the antenna size.   All GNSS devices fail under canopy.  Any manufacturer states 68% confidence statistics for the open sky.   Here is USFS link.  USDA Forest Service Global Positioning System: MTDC Accuracy Reports

I have been using a Trimble 7x unit with Esri ArcPad for several years.  I have been able to get submeter accuracy with the built in internal antenna under pretty thick canopy cover with just SBAS corrections.  We recently purchased a Trimble TDC 650 unit and had issues with ESRI Field Maps, so we switched over to TerraFlex and still seem to be having difficulty getting SBAS corrections to get submeter accuracy under tree canopy.

Anyone else having these issues?  Just curious if the Trimble 7x anenna is/was better than the TDC 650 antenna.

Thanks