The SGR (Space GPS Receiver) is a spacecraft orbit/attitude determination sub-system designed for small applications.
The SGR provides GPS standard time, position, velocity and attitude measurements in a compact and low power unit at low cost.
The Global Positioning System (GPS) consists of a constellation of 24 satellites at an altitude of 20,000km and can be used for positioning on land, at sea, in air or in space.
Through the use of interferometry techniques with multiple antennas, the phase differences measured can be used to determine the attitude of the spacecraft to a high accuracy.
Surrey Satellite Technology Ltd (SSTL) is a leading manufacturer of small satellites and sub-systems.
GPS Reinvents the Wheel http://tcicorp.com/html/GPS Reinvents the Wheel.pdf
Along with the route of the pipeline the surveyor keeps a keen eye out for significant features along the corridor to mark on the map: roads and rivers, valves and pump stations.
At the same time, he or she is collecting another virtually "invisible" piece of information for the pipeline engineers: the actual length of the pipe from start to end.
Before the development and widespread use of GPS, all of these data were routinely collected using a wheel, tape and sketchbook.
It holds a special place because it accurately measures the true distance along the pipe making possible a measurement system called slope stationing.
GSAC_IGS_Ottawa
Loosely defined, the GSAC is a network of agencies, users, data/metadata exchange formats and communication protocols facilitating the expeditious flow and availability of GPS-related information among it's participants.
They collect/ receive data/metadata from a set of providersand then make that data available to the GSAC via a prescribed publication protocol and data availability policy.
Communicate with retailer services on the behalf of end users
facilitating data discovery, data collection and data sharing among GSAC participants.
streamlined by a common cataloging process and metadata interchange format.
of their data in the GPS community, as well as data quality-control provided by wholesaler.
· Broaden diversity and functionality of GSAC clients.
lassenlp
This embedded technology gives the system developer the programming flexibility to achieve a significant reduction in power consumption.
After gathering satellite data and computing its location, the receiver may be directed to power down to a minimal mode of operation for a programmed interval or until awakened by a hardware interruption.
Schedule Track provides hot start performance at a programmed interval or in response to a hardware event.
Ease of integration Lassen LP GPS provides a choice of data protocols for maximum flexibility.
The TSIP binary data protocol incorporates new power management features and provides maximum control over system operation.
The TAIP and NMEA protocols are available where ASCII data is preferred.
The Lassen LP GPS also incorporates Trimble's antenna detection and protection circuit to monitor the condition of the antenna system.
GPSOS_NPOESS
Abstract- The Global Positioning System Occultation Sensor (GPSOS) is a precision GPS instrument carried by the NPOESS spacecraft.
The measurements are obtained by tracking signals of GPS satellites that are observed to rise or set through the atmosphere while recording the signal amplitude and phase.
The technique provides a method for global scale monitoring of ionosphere electron density profiles and scintillation properties, as well as temperature, pressure and humidity profiles in the troposphere/stratosphere.
The GPSOS has been developed for the National Polar-Orbiting Operational Environmental Satellite System (NPOESS) under the direction of the NPOESS Integrated Program Office (IPO).
From this data it is possible to retrieve the vertical electron density profile as well as the neutral atmosphere refractive index profile.
gps-primer
The men and women who created the Global Positioning System (GPS) were once young people like yourself.
Using a GPS receiver, you are able to help ships avoid disaster by zeroing in on the position of the icebergs and notifying ship captains of their locations, perhaps averting disaster.
The satellites transmit signals that can be detected by anyone with a GPS receiver.
They relied on GPS receivers outside the tunnel to check their positions along the way and to make sure they met exactly in the middle.
Many police, fire, and emergency medical service units are using GPS receivers to determine the police car, fire truck, or ambulance nearest to an emergency, enabling the quickest possible response in life-or-death situations.
GPSProtocol
If you cannot get a valid signal under the tree, move to the nearest open area and acquire the 3D location.
Sometimes just moving around the tree may provide better signal reception.
· Write GPS information in the 'REMARKS' area.
· Record street address or intersection, if possible (can use this to find general area -- within ½ mile at most -- in absence of UTM coordinates).
SOD GPS Protocol and various GPS handheld units: http://camfer.cnr.berkeley.edu/oaks/GPSProtocol.html General information about Sudden Oak Death: http://www.suddenoakdeath.org/ Monitoring Oaks Home: http://camfer.cnr.berkeley.edu/oaks/ OakMapper webGIS application: http://hilda.espm.berkeley.edu/ Contact Maggi Kelly at mkelly@nature.berkeley.edu or Karin Tuxen at karin@nature.berkeley.edu.
File_Locations_9097 http://www.teletype.com/pages/support/Documentation/File_Locations_9097.pdf
When installing the TeleType GPS program on desktop computer (or laptop) and Pocket PC, the default directory is C:\Program Files\GPS.
TeleType GPS Aviation CD also includes several utility programs, such as 1.
Weight & Balance -- a program that allows you to modify the weight and balance parameters of your aircraft to determine flight load envelop.
Before you install these programs, please refer to the corresponding user guide (located in the same directory with the executable file).
When you insert the GPS CD into the CD drive, an automatic installer shows up.
However, if you want to activate the installer manually, please click the setup.exe file according to the table below.
specs
The GPS Leader combines Global Positioning System (GPS) data with user-input features to improve data accuracy and utility.
For example, when used for a household travel survey, the device allows collection of trip-by-trip vehicle occupancy and trip purpose data for the driver and all passengers and can be used to determine correction rates for traditional survey methods (travel diary with follow up telephone interview).
The control unit is placed out of the way in the vehicle; the power cable is plugged into the cigarette lighter; the GPS antenna is magnetically attached outside, usually on the roof; and the handheld data entry unit is kept accessible for use when the vehicle is stopped.
latestpan
Analysis of this data includes the following categories: Coverage performance, Service Availability Performance, Position Performance, Range Performance and Solar Storm Effects on GPS SPS performance.
Availability was verified by reviewing the "Notice: Advisory to Navstar Users" (NANU) reports issued between 1 October and 31 December 2002 and by calculating the satellite availability from the data obtained from the fourteen sites.
Using these almanacs, an SPS coverage area program developed by ACT-360 was used to calculate the PDOP at every 5o point between longitudes of 180W to 180E and 80S and 80N at one-minute intervals.
Satellite availability performance was analyzed based on published "Notice: Advisory to Navstar Users" messages (NANU's).
gpsrole
The GPS carrier signals originate from on-board atomic clocks monitored by ground control stations, as depicted in Figure 1.
Users of both precise time and precise frequency require precise time intervals as measured by the time between periodic pulse edges or waveform zero-crossings.
Modern digital communication networks use time intervals to maintain synchronization between transmitter and receiver clocks so that data frame buffers at the receiver can maintain frame alignment with infrequent "slips" requiring retransmission of the data frame.
The accuracy of GPS time signals is related to the ability of the receiver to accurately track the received C/A PRN code.
Accuracies in the 100-nanosecond range are possible with undegraded GPS signals and correct receiver position.
Navman GPS 3000 Install Instructions (Smartpath) http://www.memory-map.co.uk/downloads/Navman GPS 3000 Install Instructions (Smartpath).pdf
iPAQ ROM Upgrade (36xx iPAQ only) The Navman GPS 3000 requires Compaq iPAQ ROM version 1.77 or later.
Some 3630 and 3660 iPAQs will require a ROM upgrade, newer iPAQs such as 3760, 3850 & 3870 do not need the upgrade.
Install the Navman GPS driver to your iPAQ Insert the SMARTPATH Trip CD and select Add GPS support.
IMPORTANT: When the driver installation has completed we recommend performing a system reset.
Check that you have installed Memory-Map Pocket Navigator version v2.5.6 or later If you have not already installed Memory-Map Pocket Navigator follow the installation instructions supplied with your software.
