For precise work, especially where the height component is important e.g. control station establishment, the process of double window averaging should be undertaken using a SmartRover or Base & Rover. You should observe an averaged window of around 3 minutes (180 positions set in your “Point Occupation settings”) followed by another averaged window of the same length separated from the...
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Height effects and ocean tide loading
For the majority of England and Wales, the errors caused by the tropospheric effects and height variations between OS Net sites and your Network RTK rover position are generally well modelled by Network RTK providers (SmartNet). However, where these height differences increase (e.g. Snowdonia, Lake District and Scottish highlands) as illustrated below, it is recommended that the window averaging procedures... -
PIN Code theft protection for 1200 & Viva instruments
The past 18months has seen a significant growth in the theft of survey instruments, particularly unattended Total-Stations. The TSA LinkedIn group has been very successful in highlighting thefts and methods to avoid such situations. http://www.linkedin.com/groupItem?view=&gid=2300386&type=member&item=132438482&qid=e7dcdee4-6317-4333-86b2-f7949bbfd689&trk=group_most_popular-0-b-ttl&goback=%2Egmp_2300386 For inner-city work, or urban sites without perimeter hoarding, SCCS advise the use of security PIN codes for kit. For TPS1200+ “Enter Security PIN Code”... -
Echo Sounding – Leica SmartWorx & SonarLite for hydrographic surveys
Echo Sounding – Leica SmartWorx & SonarLite for hydrographic surveys Leica Geosystems ‘System 1200’ can now accept and record depths from an Ohmex SonarMite echo-sounder via a cable. When you measure a GPS position (RTK), the most recently received echo-sounder depth is recorded as an Annotation to that point. For shallow inshore and offshore waters, this new synchronization opens... -
Why choose Viva GNSS?
Why choose Viva GNSS? In today’s world of GNSS, using a single GNSS (e.g. GPS only) is a huge disadvantage and consequently a variety of receivers on the market are GPS and GLONASS capable. It is important that a GNSS receiver minimizes the ISB when used in multiple GNSS constellation processing without introducing additional errors. The image below shows how...