Hello,
I'm sorry for reactivating an old topic, but I have to ask Mark:
"Is your X90 still in good condition, and are you still happy with it?
And one experience to share with Peter Kozub.
I have an SOKKIA GRX1 unit with SOKKIA SHC2500 kontroler + SSF sofware,
paid in Serbia (where I an from) from authorized dealer about 17000$,
after 3 year of use, my touch screen on SHC2500 died, and authorized representative of SOKKIA asked more than 1300$ for repair(960euro in may 2014).
Since poor financial situation in our country, i had no money to spend for it (awerage pay in Serbia is about 400$ per MONTH). So I bought used NOMAD with survce for about 650$.
My colleague, also bought same unit and hard driwe of Sokkia SHC2500 died after less than 3 years, repair cost 1600$ (1200euro in july 2014).
My other colleague bought FOIF GNSS for 9000$ with kontroler and softvare, and still using it without any problem(in past 3 years he bought +2 FOIFs, and all of them work like first day).
From my experience I dont need to ask anybody what is the crap, crap is what is going to cost you more.
Now if I have money for equipment, I would buy only cheaper, but not worser (CHC, FOIF, etc), or used Leica, Sokkia.... in good condition.
Need to mention, still working on my 2004year Sokkia set610 total station, without any problem during this 11 years.
SORRY FOR MY BAD ENGLISH!
We added 3 OPUS X90 GPS to our collection last August. Since then we have tried to keep one running on a stable secure monument 24/7. We had a few problems with power but I think we got that all worked out now. The last time I downloaded the data,mi sent all the files to OPUS and ran the results through the OPUS accumulator. The standard deviation of those observations was small. If I remember correctly,mother range of he horizontal positions was 3 mm. For static observations I will put the X90 OPUS up against any of the other units. Within it's limitations it is as good as any. Processing with OPUS, Glonass and all the other bells and whistles doesn't help. CORS is only L1 L2. In 10 years when the upgrade all the CORS it might be different.
If you snoop around here and the internet a little bit, you'll be able to find out how to replace that screen yourself for less than let's say $50...
I just finished sending a batch of RINEX files from one of our OPUS X90 GPS receivers to OPUS. I had collected 31 days of data on one station. I took all of those results and added them to the other observations and ran them through the OPUS Accumulator.
The average position is 34-39-55.900195 92-09-21.372180
The UTM Minimum is 577335.258 X and 3836276.404 Y
The UTM Maximum is 577335.273 X and 3836276.420 Y
The range is 0.015 X and 0.016 Y
The Average UTM is 577355.266 X and 3836276.411 Y
The Std Dev is 0.002 X and 0.003 Y
The orthometric height Minimum 75.169
The orthometric height Maximum 75.204
The Average is 75.1866
The Standard Deviation is 0.0064
All of this is with a less than $2,000 GPS unit on a very stable monument. All of these observations were not done with the same receiver. We have used 4 different OPUS X 90 receivers in this science project. All units are metric. This is an analysis if 136 measurements to prove the accuracy of our GPS and the stability of this monument.
We have other GPS receivers that are much more costly but I don't think we would have gotten any better results. For this application the OPUS X90 is perfect.
I would be very grateful, if you show me where I could find the display.
I think that is a problem because it has to be replaced the entire front panel, so I've been told the service.
