FWIW,I am more familiar with the non-commercial packages. As you indicate the commercial (proprietary) packages have become more "black box" and less ...

Howdy,I was not trying to be unhelpful. The issue of cc v noncc is of interest to specialist users. I do not expect there to be much available in that...

Some more details on this issue see: ftp://igscb.jpl.nasa.gov/pub/resource/pubs/06_darmstadt/IGS%20Presentations%20PDF/2_2_Schaer.pdfDr Jim Ray of the...

Jim Frame, post: 412949, member: 10 wrote: From the Trimble 4000 Series Reference: Good info. On this issue you may find of interest. Using this uti...

I hope the dimension you use are those in this diagram from the NGS site. In the early years the field observers were always blamed for poor processin...

However we might want to celebrate the heroes of geodesy, I sure don't want to add to the equations above additional programming complexity of dates o...

Jimmy Cleveland, post: 410759, member: 91 wrote: Is the Texas A&M Master's an online program?Here is a link to their on-line Masters

You mean like this one?

As can be see above, the reference ellipsoid does NOT include reference to where the origin is located. You are correct that the origin of NAD83 and I...

gschrock, post: 410313, member: 556 wrote: Dinner with geodesy-power-couple (and nearly-weds) former NGS-ers Renee Shields and Dave Doyle.... I had o...

gschrock, post: 410685, member: 556 wrote: My guess is that it will not be based on the NAD83 ellipsoid (and noting that this is more along the lines ...

BushAxe, post: 410447, member: 11897 wrote: Good suggestion. I have been considering adjusting my own tribrachs. I will probably invest in some calibr...

Could be mid-recollecting but I thought Galileo, like NAVSTAR GPS was intended to provide two levels of service. A free and a for pay service providin...

FWIW,On this topic I prefer D.B.Thomson's Introduction to Geodetic Astronomy (1981) available as a PDF below:Gave away my copy of Mackie's years ago a...

GISJoel_GetItSurveyed, post: 409225, member: 11867 wrote: Mark,You are correct. Someday I will get the right acronym for them.Sent from my iPhone usin...

No room for retirees? In my career I have worked in 49 of the fifty states as well as a few foreign countries. I have not yet made it to Alaska. Runni...

FWIW, this is article "Estimates of Minor Ocean Tide Loading Displacement and Its Impact on Continuous GPS Coordinate Time Series"Also, from the READM...

Also, from the (Windoze version) PAGES program output we see what modeling is performed and the date it was added/modified/corrected in the program. ...

The above document details the analysis strategy of the US NGS with respect to their contribution to the IGS. Note references to earth tide modeling i...

Yet more relevant reading is See especially section 7.2.4.3.1.Also from DMA -> NIMA -> NGA . - NGA page showing algorithms for "Standard Moloe...