iG5 User Manual
42
GPS 'Settings' Tab
The GPS Settings options on the download tool are not
compatible with the iG5. You can use the Wi-Fi connection to
make recording interval changes to the iG5 or LandStar7 can
be used via the Bluetooth interface.
The ‘Log’ Tab
The ‘Log’ tab shows detailed results of the current program
operation. It may be useful to debug some aspect of file
processing.
OPUS: What is it?
OPUS (Online Positioning User Service) is a free service
provided by the NGS (National Geodetic Survey.)
From the NGS Website:
“
This Online Positioning User Service (OPUS) provides
simplified access to high-accuracy National Spatial
Reference System (NSRS) coordinates. Upload a GPS data
file collected with a survey-grade receiver and obtain an
NSRS position via email.
OPUS requires minimal user input and uses software which
computes coordinates for NGS' Continuously Operating
Reference Station (CORS) network. The resulting positions
are accurate and consistent with other National Spatial
Reference System users.
”
Here are links to more detailed information:
http://geodesy.noaa.gov/INFO/OnePagers/OPUSOnePager.pdf
http://geodesy.noaa.gov/OPUS/about.jsp
One of the most important contributions to vertical accuracy
computed by OPUS is the length of occupation. Longer times
are better. If you are concerned about elevation, please
