The GPS Buoy Finder is a small battery powered portable receiver for use with the Directional Waverider buoy equipped with the GPS option.
This small stand alone receiver has a liquid crystal display to show the received position from the Directional Waverider.
In order to get a very stable and narrow transmission channel, the GPS Buoy Finder works with a crystal oscillator tuned to the frequency of the Directional Waverider.
leather bag hifx-27 TNC, short flexible antenna magnetic antenna foot with 10 m coax cable trimming tool (mounted inside the unit) two 9 V batteries a TNC-BNC convertor An optional directional magnetic antenna is available.
ACE_III_datasheet http://www.framos.de/pdf_sheets/ACE_III_datasheet.pdf
Higher integration of the RF section cuts component count by 25 percent, improves reliability, and delivers rapid startup over the entire operating temperature range of --40ÚC to +85ÚC.
The ACE III I/O ports also can be configured to output standard NMEA data messages and to receive RTCM SC-104 differential corrections for 2-meter accuracy.
TSIP data packets are output once each second.
The ACE III GPS Starter Kit makes it simple to evaluate the exceptional performance of ACE III GPS modules.
The kit includes the ACE III GPS module installed inside a durable metal enclosure, a mag-netic-mount antenna, an AC power adapter, a serial interface cable, a reference manual and GPS software useful for application development.
mgp-25
FORMAT, DAYLIGHT SAVING TIME, AND TIME ZONE.
THE DISPLAY BUTTON WILL DISPLAY THESE REGISTERS.
The (Time Invalid) indicator is on for 10 seconds to establish communications.
The (Time Invalid) indicator is now on for approximately 5 minutes to verify time.
VERIFYING PRECISE TIME:---- When the (Time Invalid) indicator goes out, the master will set, automatically.
In many timing applications, such as (911) centers / emergency dispatch, time / frequency standards, site synchronization systems and event measurement /tagging systems, GPS receivers are replacing older timing technologies.
The DDS GPS master uses the signals from these GPS "clocks" to correct it's own internal clock.
195
This GPS-Ethernet Control Module provides a GPS (Global Positioning System) interface that allows the AX/4000 Broadband Test System chassis to use the timestamp and frequency reference derived from a GPS receiver.
The 10BASE-T Ethernet port replaces the standard GPIB connector, enabling the AX/4000 system to connect to an Ethernet-based network for remote access and control.
The GPS-Ethernet Control Module BITS (Building Integrated Timing Supply) input connectors support the ability to generate cells based on a precision or common clock reference.
This module provides all of the functions of the standard control module, plus an internal timestamp generator and BNC connectors for synchronizing timestamps across multiple co-located chassis.
Receives a one pulse per second TTLsignal terminated at 50 ohms.
navman_gps_3420
The convenient, powerful and easy-to-use personal navigation solution.
Whether driving across country, walking around town or anything in between, the Navman GPS 3420 includes everything needed to turn an iPAQ H3600, H3700, H3800 or H3900 Pocket PC into a complete street navigation solution.
We even included a windshield mounting bracket and vehicle power adapter.
The GPS 3420, your complete personal navigation solution!
20001
The "Global Velocity Synthesis Working the establishment of such a map have been made Group" (GPSVEL) is a new initiative by the University (Kreemer et al., 2000), using a variant on the method NAVSTAR Consortium (UNAVCO), and falls under introduced by Haines and Holt (1993).
The Global Strain Rate Map, determined by combining geogoal of GPSVEL is to synthesize velocity vectors from detic data, seismic moment tensors and Quaternary fault international GPS campaigns into a consistent global slip rates, will provide a large amount of information reference frame.
There are several possible things that investigators might be able to contribute (1) GPS data and/or solutions, (2) technical expertise, and (3) the authority to direct any resources which may be necessary to accomplish this task.
XoraTIMETRACK_PR
Customers who have signed up for Xora GPS TimeTrack are now able to monitor and enforce overtime policies, automate data transfer to payroll systems, enforce driver speed and stop time regulations and optimize routing of deliveries.
"Xora GPS TimeTrack gives an up-to-the-minute picture of productivity information on all of our ongoing jobs," commented Shannon Kennemore, Controller of Magnum Drywall, a construction services company based in Fremont, California, and Xora GPS TimeTrack customer.
Customers who don't need the location capability can use both WAP and non-GPS Java phones and deploy time/workorder applications to their mobile workforce.
This allows Xora to deliver an enterprise class solution for a fraction of the cost."
poster
The GIS framework consists of three categories of information: 1) A spatial database, managed within ArcView in the form of maps and tables, and standardized to WTM coordinates; 2) A station records database, managed in the form of tables within Microsoft Access or a comparable program, customized to facilitate linkages to field boundary layers.
· Determine definite field boundaries and mark distinct points with flags before collecting GPS data.
Primary and subfield boundaries -- Field boundaries are obtained though GPS surveys; the accuracy is ±1 meter, sufficient for most applications.
· Soil type and slope information within the station -- The soil type and slope for each field is derived in ArcView by overlaying the field boundaries on the soil map, this data is also stored in the MS Access database as a table.
markel 6503
One of the current areas of military interest is the incorporation of Global Positioning System (GPS) navigation information with precision guided munitions.
For these reasons, the data is often assumed constant (and equal to 1) for receiver performance analysis.
A variety of algorithms and adaptations of algorithms have been developed since then, each with different optimization strategies and constraints.
In general, however, all adaptive beamforming algorithms attempt to reduce undesired interference signals while minimally affecting desired signals through the use of correlation of waveforms received through multiple sensors.
D. Zheng, J. Li, S.L. Miller, and E. Strom; "An Efficient Code-Timing Estimator for DS-CDMA Signals," IEEE Transactions on Signal Processing, VOL 45, No. 1, January 1997.
00938137 http://docs.trb.org/00938137.pdf
The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein.
To facilitate the study, a 19-station control network was developed in Southeastern Connecticut and surveyed to High Accuracy Reference Network (HARN) standards using dual frequency, carrier-phase GPS.
The parameters affecting position accuracy we wished to evaluate were distance from base station, number of base stations used, number of receiving frequencies (L1 alone or L1 and L2), and observation time.
Using one base station and receiving on L1 alone, observation for 60 minutes was required to yield 2 centimeter horizontal position accuracy for distances up to 10 kilometers.
Global Point GPS Info
GlobalPoint GPS is designed to stand up to the most rugged industrial and field conditions and deliver accurate GPS location information for your mobile data solutions.
Satellite signal tracking engine to perform GPS acquisition and tracking functions without CPU intervention.
Serial port and power pass-through on snap-on unit.
This chip set uses a 50MHz ARM7 CPU, which has ample throughput to support extensive user application software and peripherals.
SingleSat positioning mode which lets navigation systems continue to update positioning information when only a single satellite's signal is detectable.
(Other GPS solutions require three or more satellite signals to update a position.)
ION http://www-gpsg.mit.edu/~tah/ION2003.pdf
· Prior to GPS, very long baseline interferometry (VLBI) was developed (late 1960s) for making astronomical and geodetic measurements.
· For geodetic measurements, this system used cross-correlation of (high-bandwidth) recordings of signals from extra-galactic radio sources to determine time delays between signals arriving at different radio telescopes located around the world.
· In the late 1970s when GPS satellites were launched, it was clear that a similar technique could be used with to measure the travel time differences between the satellites and ground receivers.
· However, on global scale and at levels of tens of millimeters of position, GPS has systematic errors due to phase center variations and possibly dynamics of satellite orbits.
