Are you expected to start the survey upon arrival at site that's 140 miles from office? I think the 1st day upon arrival is to find lodging & char...

@mathteacher Yes I am working in southern part of Luzon. We usually do not use online GPS processing services because we have heard since day 1 that ...

thanks for all the input, I have really learned a lot from your expertise.

@john-hamilton You do know that difference between wgs84 and nad83 or grs80 to be exact is less than 1mm?

Difference between wgs84 and itrf is in the mm range with height reaching approximately 15mm  

@geeoddmike Will accuracy improve if the UTM coordinates were converted to lat/long/ht? Will the points from AusPos coincide with that that from OPUS...

You know how ridiculous that sounds? It's like saying to get the same distance, all surveyors should buy the same brand of total station, or to get th...

So to test your argument that as long as you have a long enough observation file, you would get the same coordinates from anywhere in the world. So I ...

I asked that question because the poster said that it doesn't matter how LONG your baseline is as long as your observation period reaches 6 hours or m...

I recently used OPUS with some data I had handy. I chose the CORS for three submissions of the same data. I chose sites to explore how solutions chang...

Can you please upload your RINEX files & let us know what GPS units?ÿ and antenna were used in your observations? I bet geomatics students &?ÿ...

CCleaner

I would prefer to have to call or email?ÿ up 1 than 2 customer service hotlines.

accuracy of GPS results is dependent on distance from a base to a rover. that's the reason why every manufacturer's specification for GPS receivers ha...

@rover83   so do the manufacturer's specifications still apply or not? I stated that 5mm +1ppm is what he should expect to get. I  did not...

So if you consider field work as Non Ideal Conditions then the same specifications still hold true right??ÿ

@jaccen We use Excel for encoding because we have more copies of Excel than Autocad Civil or Map or ArcInfo. We do not link the Excel file to Autocad....

@bill93 when you use a nearby control point with known published coordinates, do you ask where it got its coordinates? Aren't all control points or CO...

In static observations, an additional gps receiver is always a good thing. Think of it as adding another CORS. Elevation from such a long baseline wou...