Kinematic surveying with Locus
Posted By LEE MOORE on 9/28/2001 at 7:55 PM

My GIS department wants to use my equipment to do some mapping work. I would like to hear people's experiences and recommendation on how to best attack the job.

Equipment:
3 Locus receivers, kinematic kit, HP48 data collector (would the new one be better?), base station with GBSS software and a G-12 receiver.

The base station has very good values and there is lots of local control.

The work will be done in a suburban environment, rolling to flat terrain, lots of trees, etc.

My experiences doing static work have be great. Would like to impress the GIS folks with tight values and things working well from the getgo.

Please talk to me!


Re: Kinematic surveying with Locus
Posted By J.D. Billings on 9/28/2001 at 8:52 PM

Lee,

Did you say "lots of trees" and "kinematic" in the same post, relative to the same project?



Re: Kinematic surveying with Locus
Posted By Nearly Normal PLS on 9/28/2001 at 8:57 PM

Kinematic is nearly impossible where you have lots of trees, unless you are in the best possible conditions, reading 8 sats.



Re: Kinematic surveying with Locus
Posted By Mike Margolis on 9/28/2001 at 10:03 PM

This is no job for single frequency carrier phase kinematic. Locus Kinematic is built for a wide open site. You will be losing lock every time you're near a tree, and having to go back and reinit on knowns each time it happens.

Time for a Reliance, I am afraid. Plus, that'll make shape files in export, and have multi level descriptors, just what the GIS guys want anyway


Re: Kinematic surveying with Locus
Posted By LEE MOORE on 10/2/2001 at 12:15 PM

Obviously you guys don't work for modern municipal government. You've got what you've got to work with. Usually the the wrong equipment and not enought staff.

We need to use the equipment on hand or give up on the whole concept of GPS. If an experiment with existing equipment provides a good result, then the future might provide better.


Re: Kinematic surveying with Locus
Posted By James Webb on 10/2/2001 at 12:32 PM

Lee,

If this is to "experiment" then you can "rig" the testing a little hopefully !! The biggest thing is to minimize (as close to none as possible)the L1 only work near tree canopy and tall buildings. If this can be done then you can impress them I think.

See my post on the above thread dated 10/2. I think this might help in your experiment. Additionally you might want to search for a coupla threads on P-K, Psuedo-K for additional techniques for establishing control once you lose lock due to canopy.

Good luck,

Jimbo
Modified By James Webb on 10/2/2001 at 12:36 PM