In this workshop participants will learn how to collect locational information with a handheld GPS and plot it on a USGS topographic map using Terrain Navigator7 software.
While this workshop is meant to be a simpler alternative to mapping with GIS software and a backpack-type GPS, instructions on how to export Garmin GPS data to ArcView GIS software will also be provided.
3785 Dartmouth College Hgwy N. Haverhill, NH Directions to workshops will be sent with confirmation letter upon registration.
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The Western Australian Centre for Geodesy is part of the Department of Spatial Sciences at Curtin University of Technology.
We require one Research Associate in GPS Navigation to develop and test algorithms for a joint Australian Research Council and AAM Surveys Pty Ltd (http://www.aamsurveys.com.au) project to develop a multi-basestation GPS navigation system for positioning airborne mapping sensors.
Essential criteria for this position include a bachelor's or higher degree in satellite navigation or an appropriate engineering or science field.
A ground network of GPS receivers will be established and the aircraft positioned at long ranges (100 km) using a network solution, as opposed to the single-baseline solutions used at present.
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The University NAVS-TAR Consortium (UN-AVCO) promotes use of the Global Positioning System (GPS) in research activities.
Humidity and Temperature Transmitter in its recommended equipment for the meteorological measurement packages of the SuomiNet sites.
Manager at UNAVCO, who is also the Engineering Manager for the SuomiNet program.
At present, GPS is used for the study of diverse Earth science problems, ranging from plate tectonics, earthquake processes and volcanic deformation to sea level change, polar studies and the atmosphere.
The network, named in honor of meteorological satellite pioneer, Verner Suomi, will exploit the ability of ground-based GPS receivers to make thousands of accurate upper and lower atmospheric measurements per day.
The PTU200 Transmitter is widely used in GPS meteorology in order to estimate precipitable water vapor in the atmosphere.
pres
Maximizing the directivity of the combined signal toward the desired receiver.
Maximizing the SIR (S/I), where S is the field strength at the desired receiving location, and I is the field strength at the undesired receiving location.
Finding the positions of the mobile antenna elements.
Ai = radiation amplitude of the element i.
i = radiation phase of the element i.
i = designed phase forthe element i.
dslave = distance from the slave elements to the receivers.
dmaster = distance from the master elements to the receivers.
1. Error includes position error and timing error.
2. Desired receiving site is the only destination.
pathfdr
These versatile systems offer a variety of software, data collector and GPS receiver options so you'll find one that is ideal for your needs.
With Trimble's field software options, you can quickly and easily collect point, line and area features, along with their customized attribute information.
Because you need immediate results, the GPS Pathfinder systems family includes Trimble's realtime differential GPS (DGPS) receivers.
The GPS Pathfinder Pro XRS system integrates GPS, real-time beacon, satellite differential and Wide Area Augmentation System (WAAS) capabilities.
The GPS Pathfinder Power receiver integrates GPS, real-time satellite differential, and WAAS capabilities into a single, lightweight unit.
Important functions such as data dictionary creation, data viewing and editing, and differential correction can all be completed with ease.
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The Laser Airborne Depth Sounder (LADS) system was developed to permit airborne laser bathymetry, by the collection of accurate, high-density bathymetric data using two-colour laser light pulsed from an aircraft (Sinclair, 1999).
However, the accuracy of the bathymetric depths will be affected by the sea surface variations caused by sea swell and local tide because these depths are referenced to the instantaneous sea surface.
The results indicate that all three brands of GPS receivers can be used for long-range, carrier phase-based, airborne applications with high data rate output (5Hz, 10Hz and 4Hz).
Two NovAtel antennas were installed on the aircraft, with a separation of about 1.8 metres, and all GPS receivers logged at 4Hz.
abstract
Satellite navigation systems, which can be used worldwide 24 hours a day under any weather conditions, are presentations of the most advanced positioning systems.
A new player, Galileo, is coming to the stage.
However, the availability of the satellite navigation system, namely GPS, cannot fulfill the requirements of all users, at least, sometimes.
From the analysis, it can be concluded that, at least during the next several decades, many augmented systems and positioning algorithms will be developed in order fulfill the availability requirement of different kinds of users.
In the first section of this paper, the history of satellite navigation is briefly reviewed.
Real-Time_Correction
UNIX computer servers connected via land and satellite communication facilities are used for real-time GPS data acquisition and wide area GPS correction computation.
The Canadian Active Control System (CACS) was established to improve the accuracy and efficiency of GPS positioning and to provide a direct access to the Canadian Spatial Reference System (CSRS).
Precise GPS satellite ephemerides, clock corrections, and earth orientation parameters have been produced on a daily basis since 1992 with current precision of about 10 cm, 1 ns and 0.2 mas respectively.
network data processing, management and GPS C correction multicasting at the Real-Time Master Active Control Station (RTMACS).
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To give the students the skills necessary to operate a variety of GPS systems on their own.
Student understanding of how to acquire, download, and evaluate the accuracy of GPS data.
To have the students understand the various applications of GPS and how to integrate them into a GIS.
Due to the limited number of software licenses for downloading and analyzing the GPS data, and due to the limited number of certain models of GPS equipment, much of the work on class exercises and projects will be done outside of class time.
GPS equipment will have to be checked out to students on an individual basis, for a limited time, and for class work only.
GPS-SYS
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.
Each GPS satellite contains a highly-stable atomic (cesium) clock, which is continuously monitored and corrected by the GPS control segment.
This is possible since all GPS satellite clocks are corrected to a common master clock.
The DDS GPS master uses the signals from these GPS "clocks" to correct it's own internal clock.
The (Time Invalid) indicator is on for 10 seconds to establish communications.
FORMAT, DAYLIGHT SAVING TIME, AND TIME ZONE.
THE DISPLAY BUTTON WILL DISPLAY THESE REGISTERS.
OFR02-222ss
The Applanix Corporation's Position and Orientation Solutions for Direct Georeferencing of aerial photography was used in this project to examine the positional accuracy of integrated GPS/INS for terrain mapping in Glen Canyon, Arizona.
It was not until recently that the remote sensing and photogrammetric mapping community gave serious attention to using integrated GPS/INS technology to measure camera attitude to an accuracy that permits photogrammetric mapping without conventionally determining the camera exterior orientation parameters from aerial triangulation.
Although the horizontal positioning results proved accurate, the higher than normal vertical positional bias results of this study do not meet National Mapping Accuracy Standards (NMAS) or American Society of Photogrammetry and Remote Sensing (ASPRS) accuracy standards for large-scale mapping.
GPS http://www.sealevel.com/images/GPS.PDF
Sealevel Systems offers two GPS options designed specifically for the Rockwell Collins GPS receiver.
The main part of the modification requires changing the clock frequency in order to match the 76.8Kbps data rate.
The GPS modified boards are also able to communicate at several standard data rates as well and a brief explanation of choosing a data rate will help in understanding how to achieve data rates different than 76.8Kbps with the GPS boards.
The card is modified so that the receive side is "hardwired" to receive at 76.8Kbps and the transmit side is programmable just like any other serial port.
