Howdy,There are a minimum of three heights in the Current Survey Control section of data sheets for benchmarks. They are NAVD 88, geoid and dynamic h...

FWIW,In that it is localized, could it be radio signal interference? Of course, I would expect that any unintentional jamming would cause failure to t...

Howdy,You should also check out the historic photos at this NOAA site: NOAA geodesy photo library. All images should be in the public domain.Cheers,D...

Howdy,Rather than continuing to rely on my memory, I refer you to the following document (based on NGS documents I no longer have):See: Figure 2-3.050...

FWIW,I would first contact your NGS Geodetic Advisor for definitive advice. In any event, as the subsurface monument was set first and the surface mo...

FWIW,Before undertaking the work, I would find out the requirement. The EPA might want to know the height above ground of the top of the stack while ...

EphemerisHowdy,Since you now have the raw file converted to RINEX you might consider using the UNAVCO-developed program: "teqc" (it "Translates", "Edi...

Short-Range OPUSHowdy,An L1-only solution in PAGE-NT can ONLY be created after first computing an ion-free solution. The PAGE-NT tool uses the combin...

Howdy Mr. Hamilton,Yes, it is a great achievement. I have not seen coverage of the issue of how the subsurface location's coordinates were determined...

Howdy,I do not know whether California's NGS Advisor, Ms. Ikehara, does this review. I am pretty sure NGS policy is to encourage submittal of mark re...

Howdy,Here is a direct link to the Deformation engineering manual at USACE site though you can easily find it from the other links provided.I assume t...

FWIW,The announcement includes the following: "SUPPLEMENTARY INFORMATION: The National Geodetic Survey has not received a traditional (triangulation o...

Howdy,IF I understand your question 1 correctly you are wondering why the position in the RINEX observation file(?) differs from the data sheet for th...

In my view, the original design and implementation of the CBL program was intended to provide a low-cost, easy-to-use tool for practicing surveyors. ...

Why go to all the trouble of going to a CBL and measuring only two segments? While many folks seem happy when their measurement is "close to" the pub...