@geeoddmike, That is great feedback, thank you!?ÿ I assume the same approach will be true also with use of the WGS84 / ITRF2014 reference frame (late...

@geeoddmike, ?ÿ Thank you, I will look into Dr. Remondi's code a lot closer.?ÿ My spreadsheet calculates the GPS week, and a separate line calculati...

@geeoddmike, If my understanding is correct, I can use Geoid18 to transform any of the NAD83 datum realizations, or do I still need Geoid09 to transf...

@dmyhill, ?ÿ Thanks for that comment.?ÿ A surveyor colleague of mine was recommending to just use the ITRF2014 reference frame and not mess around w...

@bill93, Thanks for your thoughts on this subject.?ÿ My excel spreadsheet just subtracts the dates to determine total days, then divides by 7 to get ...

@mathteacher, Thank you for your book references.?ÿ I will come back around to this manual, I like your ideas on self teaching, I agree.?ÿ There is m...

@spmpls, Thanks for the paper, it was very helpful.?ÿ My understanding from the reading is that the following geoids can be paired for NAD83 transfor...

@base9geodesy, Thank you for your reading recommendation.?ÿ I have poured over it pretty good but have a few needed clarifications if you do not mind...

Thanks StLSurveyor, Well, I currently have several on the subject.?ÿ I have Adjustment Computations Spatial Data Analysis, Datums and Map Projections...