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larry-scott
larry-scott
@larry-scott
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Joined: May 28, 2014 10:48 pm
Last seen: April 9, 2026 5:20 pm
Topics: 61 / Replies: 998
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RE: Curvature of the ellipsoid

@whh114 thank you very much. Now I’ll have to figure what the hell I’m doing wrong. 

6 years ago
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RE: Curvature of the ellipsoid

@jacob-wall thanks for the link. I’m having difficulty with data entry. 

6 years ago
Topic
Replies: 5
Views: 664
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RE: Uploading to OPUS

Itƒ??s as if opus just ignore the header in rinex. And thereƒ??s justification for that.?ÿ

6 years ago
Topic
Replies: 0
Views: 806
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RE: John Adams highway surveyor

ƒ??Who are the guys on Mt Rushmore?ƒ? ƒ?I forget, but itƒ??s three land surveyors and some guy.ƒ?

6 years ago
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RE: John Adams highway surveyor

And back then a highway was a canal.?ÿ

6 years ago
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RE: Tilt of Earth's Axis and Surveying

The tilt of earthƒ??s axis to the orbital plane has only very small impacts to high order astronomical surveying. The declination of stars changes sl...

6 years ago
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RE: UTC DUT time correction

@wildt2 yeah. It’s like 1999-2006 all over again. 

6 years ago
Topic
Replies: 3
Views: 1104
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RE: establishment of site control points using gnss

You should fully test your work flow, several times with known control. I bet your vendor can assist you.?ÿ

6 years ago
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RE: Collecting Data for NGS

@jitterboogie Or back in the day when there only 4-5 hrs of satellite availability: night in winter, day in summer. 5 channel, L1, and car batteries....

6 years ago
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RE: Collecting Data for NGS

@geeoddmike micro strip antennae, and utility grade antennae. Geodetic grade is kept in the office for special projects. 

6 years ago
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RE: Collecting Data for NGS

@field-dog I suspect -90 is functionally zero. And zero elev mask is harmless to data collected. The post processing can invoke higher masks than col...

6 years ago
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RE: Collecting Data for NGS

@geeoddmike orienting the antenna N is to match the NGSƒ?? antenna calibration. The electronic phase center is not the same as the physical center of...

6 years ago
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RE: Collecting Data for NGS

@norman-oklahoma Ive seen too often the ‘newbie know it all’ freak when I set collection to 5 degree, insisting it must be 15!! So when h...

6 years ago
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RE: Collecting Data for NGS

@norman-oklahoma the task is static collection. RTK applications is real-time. The point I made was collecting at or below 10 does not effect the dat...

6 years ago
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RE: Collecting Data for NGS

@field-dog As for mask, the mask is set in the post processing. So recording to zero degrees has no detrimental effects. I routinely collect to 5 or ...

6 years ago
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RE: Collecting Data for NGS

@geeoddmike the speed of light in vacuum does not change. The signal passes thru the vacuum of space and the variable density of atmosphere, which do...

6 years ago
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RE: NGS Datasheets

@bill93 thanx. I found the sheets in Data Explorer. My frustration was the ‘classic’ retrieval page didn’t work. And apparently it&...

6 years ago
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