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SERVICES
GPS
Equipment
Base
Station
Mobile
Base Station
Survey
Grade
Mapping
Grade
Rec.
Grade
Accuracy
Table
Base
Files
Use
Policy
Training
Field
Support ..
MAPS
DATA
PROJECTS
ToolikMapEngine
page
last modified:
June 12, 2007 12:57
contact
webmaster
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Toolik
Field Station maintains a continuous GPS base station for use by the
Toolik community and the general public. The base station runs continuously
through the summer field season (May - August), with files permanently
archived and available for download through this website.
see Base
Files page for .dat .ssf .rnx file downloads
TOOLIK
FIELD STATION MOBILE GPS BASE
 .. ..
Toolik
Field Station provides a mobile GPS base station with radio link for
RTK for use by the Toolik community on an as needed basis. The base
station can be set up over known benchmarks or post-processed for
base coordinate solution.
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EQUIPMENT
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|
Receiver:
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Trimble
5700 Survey Grade w/internal & external batteries, Sandisk
128mb flashcard |
| Receiver
Config file: |
Toolik_RTK_Base.cfg |
| Receiver
Antenna: |
Trimble
Zephyr Geodetic, w/ 10m and 30m cables |
| Radio: |
Pacific
Crest RFM96W
2 watt and 35 watt toggle, Astron 12V 2.5A power supply
|
| Radio
broadcast frequency: |
464.500 MHz |
| Radio
broadcast antenna: |
1m 5dB Whip or 10cm rubber |
SETUP
INSTRUCTIONS
TOOLIK
FIELD STATION
SURVEY GRADE ROVER
|
Toolik Field
Station provides survey grade field GPS services for registered
users, administrators and managers.
Accuracies range
from greater than 10cm to sub-centimeter depending on distance from
base station and field method (see tables below)
Applications
include but are not limited to:
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-Stream
channel morphology |
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-Archiving
of research plot locations |
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-Facility
/ building survey |
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-Localized,
fine-scale DEM creation |
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-Long-term
glacial and tectonic monitoring |
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-Precise
landscape metrics |
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EQUIPMENT
|
|
Receiver:
|
Trimble
5700 Survey Grade w/ internal/external batteries, , Sandisk 128mb
flashcard |
| Receiver
Antenna: |
Trimble
Zephyr Kinematic/Geodetic, w/ 10m & 1.6m cables |
| Receiver
Config file: |
|
| Receiver
Controller: |
Trimble
TSCe w/ 2m cable |
| Controller
Firmware: |
Trimble
Survey Controller CE |
| Bipod
/ Rangepole: |
Trimble
2m carbon fiber |
| Radio: |
Pacific Crest
RFM96W
2 watt and 35 watt toggle
|
| Radio
receive frequency: |
464.500 MHz |
| Radio
receive antenna: |
1m
Whip & 10cm rubber |
GPS Best Practices - 2007
TOOLIK
FIELD STATION
MAPPING GRADE ROVERS
 .. ..
Toolik
GIS provides a range of mapping grade receivers for use by station residents,
administrators and managers. These are suitable for myriad applications,
and all support the use of data dictionaries, allowing the user to enter
field measurements and various attributes while recording the features
in the field with the GPS. Data dictionaries can be customized to meet
the users' field needs and offer very flexible and effieicnt data capture.
With minimal processing after the user returns from the field, the data
can be distributed in a variety of formats including tablular (e.g.
excel), GIS (shapefile, coverage), or delimited text.
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EQUIPMENT
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| Receiver
A: |
Trimble
GeoExplorer3, with accessory 2m antenna |
| Receiver
B: |
Trimble
GeoExplorer3, with accessory 2m antenna |
| Receiver
C: |
Trimble
GeoXT, with accessory 2m antenna (WinCE) |
| Receiver
D: |
Trimble
GeoXT, with accessory 2m antenna (WinCE) |
| Receiver
E: |
Trimble
ProXR, w/external batteries |
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Receiver
F:
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Trimble
ProXR, w/external batteries |
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Receiver
F Antenna: |
Trimble
Standard L1, w/ 10m cable |
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Receiver F Controller: |
Trimble
TSC1 w/ 2m cable |
|
Controller
Firmware: |
Trimble
Asset Surveyor 5.2 |
|
Receiver
F Radio: |
Pacific
Crest RFM96W, 2 watt |
|
Radio
receive frequency: |
464.500 MHz |
|
Radio
receive antenna: |
1m
Whip & 10cm rubber |
TOOLIK
USERS' RECREATIONAL GRADE ROVERS
   
Toolik
GIS provides limited support for registered residents who bring their
own recreational grade GPS units to the station. We can help users configure
their GPSes and ensure that they are set to the appropriate coordinate
system/datum for use with maps, coordinate lists and waypoints while
they are working at Toolik. Users are expected to have and maintain
any software required for their units, and to perform their own waypoint
/ data entry from information provided by Toolik GIS.
TYPICAL
GPS ACCURACIES
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SURVEY
GRADE
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Method
|
Typical
accuracy
|
Occupation
time
|
Typical
applications
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|
Continuous
|
< 0.5
cm
|
Months or
more
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Crustal deformation,
geophysics, reference stations
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Static
|
0.5 cm –
5 cm
|
Hours to
days
|
Crustal deformation,
geodetic control, very long baseline surveys, geophysics
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Rapid Static
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1 cm –
5 cm
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Minutes
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Short baseline
surveys, glaciology
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Kinematic
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1 cm –
5 cm
|
Seconds
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Short baselines,
closely spaced points, vehicle positioning, feature surveys, GIS
and mapping
|
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MAPPING
GRADE
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|
Method
|
Typical
accuracy
|
Occupation
time
|
Typical
applications
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Code Differential
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50 cm –
300 cm
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Seconds
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Coarse GIS,
mapping, positioning
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| Carrier
Differential |
15
cm – 100 cm |
Minutes |
GIS,
mapping, positioning |
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RECREATIONAL
GRADE
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|
Method
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Typical
accuracy
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Occupation
time
|
Typical
applications
|
|
Point positioning
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100 cm –
800 cm
|
Minutes to
hours
|
Rough positioning
(uncorrected)
|
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