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SURVEY DATA MANAGEMENT (SDM) SOFTWARE
Survey Data Management software is designed to provide the ability
to organize, view,and report information collected during various sur-
veys on or off the road. With the new WINDOWS SDM software, report-
ing is simplified with "Crystal Reports™" generated output. The ability
to export to other WINDOWS applications is also available. Data is
stored in Microsoft Access format.
KEY FEATURES:
• Vehicle Calibration for up to 4 Vehicles
• Customizable KEY DEFINITIONS for each user or application
• Ability to operate the NITESTAR remotely
• Ability to utilize optional GPS sensor
Initially, the SDM software is used in conjunction with the Nitestar 60
DMI, which is interfacing with a laptop computer during a survey.
After collecting and saving survey information, the saved information
can be viewed and organized at user's convenience.
GPS - THE GLOBAL POSITIONING SYSTEM
GPS technology helps provide latitude, longitude, and altitude coordi-
nates for a user's location regardless of the weather. The GPS course
acquisition code (CA) was designed by the United States Department of
Defense for use by the military and was made available for commercial
applications. Currently, GPS consists of a constellation of 27 earth
orbiting satellites approximately 12,000 miles above the Earth. GPS
satellites transmit radio signals containing time and orbital data to cal-
culate satellite position and user receiver data. GPS receivers monitor
the constellations and require signals from at least three satellites to
determine a two dimension position. A fourth satellite signal is required
to compute three-dimensional positioning for elevation or altitude.
SEE A SAMPLE SURVEY ON PAGE 48
THE NITESTAR GPS RECEIVER
The NITESTAR GPS RECEIVER provides GPS coordinates for applica-
tions that require vehicle mobility and in applications involving dense
urban centers and dense foliage where signals may typically be weak or
blocked. The receiver tracks all visible GPS satellites continuously and
uses all the measurements obtained to produce a GPS navigation solu-
tion. Position jumps caused by blockage in receivers with fewer chan-
nels are greatly reduced along with the effects of multi-path signals.
Road track data can be collected and stored by using a Laptop or
Notebook PC. SDM software is used to integrate inputs from the GPS
and the NITESTAR DMI distance data. GPS Receiver Architecture:
Twelve parallel satellite continuous tracking channels for fast acquisi-
tion and reacquisition. Enhanced algorithms provide superior navigation
performance in "urban canyon" and dense foliage environments.
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GPS RECEIVER SPECIFICATIONS
Power: 5v DC ± 5%
Velocity: 0.1 meters/second
Time: 1 microsecond synchronized to GPS time
Solution Update Rate: 1 per second (1 Hz)
Dimensions: 2.6" (66mm) x 2.6" (66mm) x 0.28" (7mm)
Weight: 1.4 oz (40 g)
Operating Temp.: -4ºF to 185ºF (-20ºC to 85ºC)
Connector Type: USB or Serial RS-232
2D Accuracy (GPS): Horizontal < 7 meters (CEP), 11 meters 2 dRMS.
3D Accuracy (GPS): <14 meters (CEP).
Acquisition/Reacquisition Performance:
< 15 seconds Time to Cold Start < 120 seconds.
Antenna: GPS passive
Datums: WGS-84
Serial Interface: RS-232
PERIODIC DISTANCE INTERVAL - WIRING!
The NITESTAR produces a 5 volt, low current pulse (<5mA) on
the RED wire of the standard wiring harness. NOTE: If you wish
to control 12v, high current devices (>5mA), you will need the
P/N 1050 PDI amplifier unit. This unit will allow you to control
12v devices with up to 1 ampere of current. If you are using the
PDI pulse to go to a computer or other low current (<5mA...
sometimes called TTL) device you do not need the PN-1050
amplifier. Connect it directly to the RED wire from the NITES-
TAR. If you are in doubt about this connection please consult
your distributor or Nu-Metrics as a connection error can damage
the NITESTAR or your equipment.
TTL PDI CONNECTION
If the PDI pulse is to be directly connected to a computer or other
low voltage/low power device it can be wired as shown:
NOTE:
Making the connection to external equipment requires
the users knowledge of the equipment and Nu-metrics will not be
able to support this application.
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