Nate The Surveyor, post: 332509, member: 291 wrote: When depending on a local RTN, where you DON'T set your own base up, you are good, up to 7-10 miles. But, the RMS grows too much after that. Keep a base close to your project, and you have better data, and faster fixes.
7-10 miles? You are joking right? There isn't a state funded network in the country that offers 7-10 mile spacing between reference stations.
Johnson5144, post: 332548, member: 7149 wrote: 7-10 miles? You are joking right? There isn't a state funded network in the country that offers 7-10 mile spacing between reference stations.
Not all RTN's are VRS. Arkansas has several continuously operating reference stations that do not produce a "network" solution. This is probably what Nate is referring to.
Nate The Surveyor, post: 332509, member: 291 wrote: When depending on a local RTN, where you DON'T set your own base up, you are good, up to 7-10 miles. But, the RMS grows too much after that. Keep a base close to your project, and you have better data, and faster fixes.
The whole point of a VRS network is that the atmospheric conditions that cause ppm error as the baseline length increases (resulting in higher RMS) are modeled out; in effect you are always working in close proximity to your "base". All RTNs are not VRS; if you are using a single base then yes distance from that base is a huge concern. But VRS - assuming everything is working properly - has the same fast, reliable initialization times and low RMS solutions as a local base without the cost, headache, wasted time, and theft risk.
mattsib79, post: 332403, member: 1138 wrote: Have you used any RTK GPS before? Are you looking for network rover or base and rover?
I have been using a Javad LS rover with a Javad Triumph 2 base with 4 watt UHF radio for almost 2 years now. I have used Trimble R8 model 3, Topcon hiper, Topcon Gr3, Topcon GRS1, Leica 1200 and 500 and the Javad equipment out preforms all of the above. Lifetime free updates to firmware. 3 year warranty. Customer service is provided by licensed surveyors that currently use the equipment in their practice. Send me a message and I can put together a quote for you.
The design of the Javad Triumph-LS is very interesting. Everything is integrated. It basically provides support to all constellations. The 864 channel support is also very interesting.
amdomag, post: 332662, member: 1683 wrote: The design of the Javad Triumph-LS is very interesting. Everything is integrated. It basically provides support to all constellations. The 864 channel support is also very interesting.
I like it too. But I can't go that much on one. I need a new TS too so I have to go with used. I wish I could get it though. From what Nate was telling me it's a good system.
John Giles, post: 332666, member: 57 wrote: I like it too. But I can't go that much on one. I need a new TS too so I have to go with used. I wish I could get it though. From what Nate was telling me it's a good system.
The 100hz update rate is simply amazing. My Leica GS14 Professional is only at 20Hz. The Triump-LS must be very good for structural monitoring applications. The best thing is.. the price is relatively lower than that of Leica and Trimble. Of course, just my own opinion.
John Giles, post: 332379, member: 57 wrote:
And second, what is out there right now new/used (prefer used) that is good under canopy? Or is there such a beast.
I have a Trimble R8-2 I'm looking to sell and I'm not too far away in Ohio, would be willing to meet and do a demo before you buy. PM if you're interested and we can discuss price.
geopro_consultants, post: 332676, member: 9959 wrote: I have a Trimble R8-2 I'm looking to sell and I'm not too far away in Ohio, would be willing to meet and do a demo before you buy. PM if you're interested and we can discuss price.
Do you still have the R8-2 for sale?
David C. Newell RPLS LS CFM, post: 332850, member: 6347 wrote: Do you still have the R8-2 for sale?
Yes, please email me through the fourm and we can chat.. I don't check this site very often. :whistle:
First demo done on GPS. A little disappointed.
How much did you guys have to pay to demo a unit for a few days?
John Giles, post: 333258, member: 57 wrote: How much did you guys have to pay to demo a unit for a few days?
In the middle of summer, busy time, your salesman will have people competing to rent that unit out. In the winter when things are slower he might be more willing to loan it to you, no charge, for a couple days.
So what unit did you demo, and why were you disappointed?
I demo'd a geomax 20 and I wanted to demo it for a couple days to get a feel for it. It's hard to know what's going on in a hour or two. He said it would be $200 a day, which is fine. Then he told me I couldn't have it for at least a week. That's what I was disappointed about. I was wanting to play with the dang thing.
He was able to answer every question I had. So that was good. He does know the the system well. It was a learning experience and it's not as complicated as I imagined. Pretty straight forward.
He told me over the phone I could demo it for a few days, never mentioned money, then brings it here and won't let me keep it. I guess I'm disappointed in that too after he said I could keep it a couple days. And the money thing got me, to be honest. It wouldn't have if he would have been upfront over the phone about it. But just a last minute notice wasn't what I expected.
I guess I'm whining. I should have figured it would cost to demo it. This is my first time demo'ing equipment. I didn't realize I would have to rent it. So that is my ignorance too.
Most people don't realize that the dealership has to buy those demo units. The manufacturers don' t just supply them free of charge.
When I used to work for Leica as a sales rep I used to do a lot of GPS demos (demonstrations). They usually lasted anywhere from one hour to half a day. If a person wanted to use the equipment for a few days I would consider that a rental, but if they ended up purchasing the system I would put the rental cost towards the purchase price. Like Norman mentioned, if things were slow I might be able to loan it out for a couple days, but the recipient would still have to fill out all the rental paperwork and accept a hold on their credit card for liability. A lot of it is at the salesman's discretion based on how serious of a buyer he thinks you are. With salespeople the hungrier the better : ). Whatever you decide on, invest the extra money in some training, it will pay for itself in productivity and less time banging your head against a wall.
-Will
It never even crossed my mind. I would have gladly rented it. It was just the sour note at the end of a good session. If he would have been upfront about I wouldn't have had the dumbfounded look on my face.
Don't get me wrong. He is a good guy. I think we just got our wires crossed. He probably didn't realize I wanted it today. He did offer to take off the rental fee if I bought. I should have mentioned that in my last post. I wanted it today. I've been dreaming of getting one all week since we set up the appointment. He had to take it though to show it to other potential buyers and I can't get my mitts on it until next week.
Sounds like a simple miscommunication... I was a sales rep for years, and the two biggest pitfalls are not making sure you clearly understand the expectations of the customer and assuming that he clearly understands your intent and constraints.
I don't know your specific situation but it sounds to me like when the rep said "sure, you can try it for a couple days" what he meant was "if you like the demo I can make arrangements for you to try it for a couple days". Those are two different things.
We've used both, Trimble R8's and Leica Vivas, in WV, using the WV DOT network. They both work fine, but most of the guys like the R8's better.
But you should definitely think about about getting a base/rover unit for when you don't get connection to network - which happens a lot. We mostly use the network to establish our own base locations, and then set our base on those.
I guess they all work, having said that, I see better results when using ALL hardware and ALL software from a single source, for me that is Leica hardware on my end running on Leica Spider at the provider end AND with all Leica receivers in the RTN. My experience shows that NOT all measurement engine boards are created equal although at the end of the day you will end up with close to the same coordinates at the rover end, if it processes. I make these statements from lots of experience post processing data from multiple brands of receivers and a couple different post processing packages. Let me just say the biggest ads DO NOT necessarily mean the best equipment.
There are also times where some data simply will NOT post process, haven't nailed down why yet, there are some CORS that just seem to be better than others, even within the same RTN, thus my statement that ALL one brand does seem to have some potential advantages. Having said that, you also need to look further than the outside color, many brands have OEM parts inside from one of just a few sources, same with antennas. I am more familiar with Leica, so will speak to that, they are a part of the Hexagon group which also owns NovAtel, over the years many brands have been NovAtel inside and very few actually said NovAtel on the outside.
YMMV
SHG
Leica always said it's not the measurement engine board that matters, but the firmware used to process the data. All their features like SmartCheck, multipath mitigation, etc. are things that the squints in Switzerland developed and are unique only to Leica equipment.
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John Giles, post: 332379, member: 57 wrote: I'm looking to purchase some GPS equipment. My area has a Trimble network.
First should I stick with Trimble to make sure I get compatibility?
And second, what is out there right now new/used (prefer used) that is good under canopy? Or is there such a beast.
This will be my first purchase of GPS equipment so please feel free to give me plenty of advice.
Dear jon
You can freely work with your desired GNSS receivers like LEICA OR TRIMBLE ...(track at least GPS and GLONASS to be used in canopy area)
In canopy area you can not be sure to do your job completely
With Gnss receivers and maybe you have to do your job with TOTAL STATION OR DISTO ,....
working in urban area or under trees depends to many factors like number of satellites receiver can be tracked(It will be better when GALLILEO becom fully operational and so Chinese BEIDOO),receiving correctons via GSM/GPRS ,UHF RADIOS,....
GNSS receivers all support network correction services like RTCM2,RTCM3 and company specified format VRS,MAX,FKP....
I prefer to work with LEICA receivers because of many reasons.i have tried the most company production like LEICA,TRIMBLE,THALES(ASHTECH OR THALES OR MAGELLAN ),SPECTRAPRECISION,GEOMAX ... .
I suggest you to buy LEICA GS14 WITH CS20 controller (BE CAPTIVATED SERIES) or GS09 WITH CS900 CONTROLLER,... .
TRIMBLE R10 OR R8 with TSC3 controller.
if the price is important to you,you can buy GEOMAX ZENITH25 PRO,JAVAD TRUMPH,SPECTRAPRECISION SP80 or ....
REGARDS
