We have released a new Tech Talk video demonstrating how to get started using the new Minnesota VRS system which utilizes Trimble Pivot software. The old software (VRS3Net) and the new software (Pivot) will continue to run simultaneously until the end of the year, on December 31 the old software will be terminated.
There will be coordinate shifts between the two software systems, so make sure to recalibrate your project areas when switching between software systems. The old software is based on the 2007 realization and transformed to 2011 and to 1996. This is the basis for calculating the mountpoint corrections. The new software is based on 2011 and transformed to 2007 and to 1996. Refer to #11 on the FAQ for calibration recommendations: http://www.dot.state.mn.us/surveying/cors/mncors_faq.html#Q11. Also view our blog post “Four Questions About GNSS Site Calibrations“
Our MnDOT District Survey Offices throughout the state were able to conduct statewide tests utilizing the new software platform and compared the results to the old software platform. The testing results indicated that when using uncalibrated positioning, the new software will more closely resemble MnDOT’s 3D Geodetic benchmarks in all NAD83 adjustments (1996, 2007, 2011). Therefore theyt have not included the NAD83(1996)HARN mountpoint with the new software, the NAD83(1996) mountpoint will still be available. The FAQ has additional information concerning mountpoints: http://www.dot.state.mn.us/surveying/cors/mncors_faq.html#Q9
Additional information on 3D Geodetic benchmarks: http://www.dot.state.mn.us/surveying/geodetics/index.html
The new software should help reduce the number of GLONASS outages by automatically detecting a corrupt broadcast orbit file from the satellites. For a more detailed explanation refer to #12 and #13 on the FAQ: http://www.dot.state.mn.us/surveying/cors/mncors_faq.html#Q12