Static survey with Emlid reach M+

[nursarinaldo (Rinaldo Nursa)]

I did GCP (ground control point) survey
emlid reach M + is used for gcp survey and processed by static methods
static processing results have been fixed 100%
emlid measurement results are used to be used as check points in photo processing at agisoft
error results in agisoft: East err 0.49 m, North err 1.02 m, Alt err 1.38 m.
results must be below 10cm
anyone can help?

Here’s the pictures of survey

result agisoft

[Sylvain_POULAIN]

• GCP should be in a flat surface with also flat material for better results
• Antenna when measuring GCP should be level.

[TB_RTK]

Also raise the antenna further up. Like 2m or so, above obstruction. Make sure you have a propper groundplate. 5cm radius

[nursarinaldo (Rinaldo Nursa)]

so it’s a big error because the antenna is on the ground?

Thank you

[nursarinaldo (Rinaldo Nursa)]

Other gcp is in a flat place but the results are still a big error
maybe from the antenna that must be raised higher?

Thank you

[Sylvain_POULAIN]

You have trees behind : possible mask.
Reach antenna does not seem level. You need this on a tripod or bipod

Also with static if there is no correction from base you could not expect better !

[wizprod (Christian Grüner)]

You’ll get a a lot of false reflection (multipath) from those tree. Raising up the antenna will decrease this drastically. In your environment, preferably 3 meters or more.

Also make sure your base is located at a site with very good skyview. That’s essential for good accuracy.

[tatiana.andreeva]

Hi @nursarinaldo,

Did you have time to test with raised antenna?