Dear Antonio,
It's been a while since we talked about RTKLIB and all those networking
options.....how is it going?
I would be glad to know something about your overall results, or some
partial results regarding the monitoring of structures you where
conducting.....I'm planning to learn a little bit of the absolute basics
in the civil engineering fields where precise positioning could apply,
particularly in the area of land surveying, in order to study possible
solutions to some of it's requirements trough the use of rtklib.
(Any other list memeber's comments about some experience in this
particular application of precise positioning (RTK, PPP or even DGPS),
are really welcome.)
Best regards!
Mauro Ugarte A.
Ingeniero de Desarrollo
División de Instrumentación Óptica y Tecnologías de Teledetección
Centro de Óptica y Fotónica
Universidad de Concepción
F/Fax: 2204740 | [email protected]
On 26/10/11 19:05, António Pestana wrote:
2011/10/26 Mauro Ugarte Avilés <[email protected]
<mailto:[email protected]>>
Regarding that chapter, you should use as your network topology,
the example 4 (Wifi) or 5 (mobile phone network), and replace on
both of those examples the block "RTKNAVI" by Spider (and maybe
move Spider to the "Base Station" or reference receiver's PC, and
"STRSVR" to the remote receiver's PC) . If there is going to be
line of sight between both locations, a Wireless Router or Access
Point connected at the Base Station's PC Ethernet port (or
wirelessly), an a USB wireless adapter with detachable antenna at
the rover's PC (this one, for example:
http://www.tp-link.com/en/products/details/?model=TL-WN722N), with
both antennas (the AP/router and the USB adapter) replaced by a
directional Wifi antenna like this one:
http://www.tiendecita.com/antena-wifi-planar-estanca-marca-abaks-p-99.html,
should do it. (Note that the antenna does not include the coaxial
cable needed to connect the antenna to the AP/router (that by the
way has to have a detachable antenna also, in order to replace
it), but that cable can be easily found on computer stores). The
USB wireless adapter used at the remote receiver's PC should be
placed inside the box behind the antenna, were the RP-SMA
connector is.
Once again very useful tips. Thanks.
My fault, no examples...but at least RTKLIB has a manual....and
there are screen captures on it!! At the GNSS positioning
techniques FOSS world, those features are not very usual... ;-).
Yes. I must agree with you. The manual is very good.
Based on that brief descriptions, you would be able to find better
explanations somewhere else: papers, doctorate theses, GNSS
equipment manufacturers, etc.
That's what I'm trying to do these days...
You will be sensing large structures, right? In that case, I would
go with "static" (static rover, static reference), not
"moving-base" (moving rover, moving reference) nor "fixed"
(constant distance between rover and base). Maybe you could go
with kinematic too, if the real-time displacements and deflections
of the structures studied can be considered as "movement".
My structures move at relatively high frequencies (say from 0,1 to 5
Hz). Most of the movements are small (a few centimeters at most).
Best regards
Antonio
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