My manager and I recently had a discussion about notes on our surveys.
We are required to note what equipment is used, and certify that it is maintained according to code/specs. We do this in a note that lists the total station used, the GNSS equipment used, etc.
But...I was wondering how I am supposed to note the use of a network? The one we use has different types of antennas, owned by different agencies and organizations.
Does anyone cover this in their notes? Do we just ignore noting the source of our corrections? (I suppose that this could apply to OPUS solutions as well.)
I know that this could get silly very fast, but I was wondering how others covered this, or if they bothered.
For a single-point determination, since a Real-Time-Network computes a Zero-length baseline solution, there are no corrections to list - no ppm(s) to consider. I would just list the fact that you used such-and-such RTN on such-and-such a date & time.
For a multiple-point campaign, once you make a number of simultaneous observations for the establishment of a new epoch of passive marks, you can quote the results of your least-squares network adjustment in terms of the Geometric Dilution of Precision (GDOP), the a posteriori variance-covariance matrices of each new survey point or the derived eigenvector/eigenvalues (error ellipsoids).
... since you asked.
Or you could shoot a distance between a couple of points located by the RTN with a calibrated EDM. 🙂
Right...
I am not so much concerned with actual calibration...in this state you have to list the equipment used and then certify (you promise) that it is all checked and in spec.
How do you handle that in a network situation where you have no control, and in a VRS situation, you might not even know what brand/type/location of the base(s) that you are getting corrections from.