Archive for May 7th, 2010
New Handsfree Vehicle Technologies 2000-2006 GM with Bose Amplified Fits GM/Chevy/Cadillac Vehicles
- 2000-2006 GM with Bose Amplified.
- This harness fits GM/Chevy/Cadillac vehicles with 22 pin 2 row grey connector.
- This harness will require connecting the loose red wire to a alternate ignition point on cars 2002 and newer.
- This is most similar to the QCHBC-GM2 and will plug directly into the Drive N Talk and Parrot MKi kits.
- Manufacturer: Handsfree Vehicle Technologies. Accessory Type: Wiring Harness.
Product Description
This harness fits GM/Chevy/Cadillac vehicles with 22 pin 2 row grey connector. This harness will require connecting the loose red wire to a alternate ignition point on cars 2002 and newer. This is most similar to the QCHBC-GM2 and will plug directly into the Drive N Talk and Parrot MKi kits. Buyer must charge a 20% restocking fee for return item (not for quality or workmanship problem)…. More >>
New Handsfree Vehicle Technologies 2000-2006 GM with Bose Amplified Fits GM/Chevy/Cadillac Vehicles
PAVE Software and Why it Helps Your Business Presort Mail Properly
Your business needs PAVE Software solutions because it is a powerful tool to maximize your company’s profitability and maintain accuracy with your data and customer profiles. The PAVE software program has been developed in collaboration with the mailing industry to assess pre-sort software while determining the accuracy of the sorting address files according to the DMM standard. This software (PAVE) is available only to the software and hardware developers. Companies that design pre-sort software or develop pre-sorting equipment for re-sale or internal use usually avail of the PAVE software.
This program is a process which evaluates and verifies the pre-sort products manufactured by developers, however, the software does not guarantee acceptance of mail prepared by PAVE certified hardware and/or software personnel. Incidentally it, however does provide national approval of computer generated facsimiles of USPS postage statements, standardization of documentation and other pre-sort documentation.
The USPS defines a PAVE certified software product as a pre-sorting product with source codes specifically written to operate on a particular platform or operating system while being assigned a specific version number. Many products use different language compilers to process files within different operating systems or on different hardware platforms. In order to maintain the highest standards of quality assurance, PAVE certifies each product that operates on a particular platform with the correct version number.
GPS principles
The basic principle of GPS navigation system to measure the known location of the satellite to the user the distance between the receiver and then integrated multi-satellite data can know the exact location of the receiver. To achieve this purpose, the satellite’s position can be based on-board clock time recorded in the satellite ephemeris identified. The user to the satellite’s distance from the satellite signal transmitted through the records to the user the experience of time, and then multiplied by the speed of light received (due to the interference of the atmosphere ionosphere, this distance is not the user and the real distance between the satellites, but pseudorange (PR): When the GPS satellites to work, it will continue to use 1 and 0 binary symbol composed of pseudo-random number (PN for short) launched navigation message. GPS pseudo-code system uses a total of two, namely civilian C / A code and the military of the P (Y) code. C / A code frequency 1.023MHz, repeat cycle of a millisecond, the code distance one microsecond, equivalent to 300m; P code frequency of 10.23MHz, repeat the cycle of 266.4 days, Code spacing of 0.1 microseconds, equivalent to 30m. The P code Y code is formed on the basis of confidentiality better performance. navigation message includes satellite ephemeris, work status, clock corrections, ionospheric delay correction, atmospheric refraction correction and other information. It is in the solution from the satellite signal modulation up to 50b / s modulation in the carrier frequency on the launch. navigation data included in each of the main frame 5 sub-frames per frame size 6s. the first three frames of all 10 code; repeat every 30 seconds, updated hourly. After the two were 15000b. navigation message in the contents of the main remote codes, code conversion, the first data blocks 1,2,3, including the most important was ephemeris data. When the user receives the navigation data, the extraction of the satellite time and do it with their own clock compared satellite and the user will be aware of the distance, and then use the navigation data in the satellite ephemeris data, calculate the location of the satellite launch when the message the user in WGS-84 geodetic coordinate system position, velocity and other information can be learned.
GPS satellite navigation system can be seen part of the role is to constantly launch navigation message. However, users accept the machine using the onboard clock with the clock can not always synchronized, so in addition to the user’s three-dimensional coordinates x, y, z, but also introduce a Δt is the time between the satellite and receiver differential as unknown, then four equations out of these four unknown solution. So if you want to know the location of the receiver, at least four satellites can receive the signal.
GPS receiver can receive the exact timing can be used to nanosecond time information; for forecasting the next few months in which broad locations satellite ephemeris; used to calculate the required positioning satellite coordinates of the broadcast ephemeris a precision of several meters to tens of meters (each satellite is different at any time change); and GPS system information, such as satellite status.
GPS receiver of the code can be measured from the satellite to the receiver, as with the receiver clock error of satellite and atmospheric propagation errors, it is called pseudorange. 0A code measured on the pseudo-range as UA code pseudorange, the accuracy is about 20 meters, measured on the P code pseudo-range as P code pseudo-range, precision is about 2 meters.
GPS receiver to receive satellite signals, decode or use other technology, the information on modulation in the carrier removed, you can restore the carrier. Strictly speaking, the carrier phase should be known as the carrier beat phase, which is received by the Doppler frequency shift effects of the satellite signal carrier phase and the receiver local oscillation signal phase difference. Generally determined by the receiver clock time measurement epoch, to keep track of the satellite signal, you can record changes in the value of the phase, but the start time of observation and satellite receiver initial phase of the oscillator is not known, since epoch beginning phase integer not know about that ambiguity, only as a parameter in the Data Processing Solution. Phase observations are accurate to the millimeter, but only solved ambiguity, only the relative positioning, and continuous observation for some time to use the phase observations, and to achieve better than the meter-level positioning accuracy of only phase observations can be used.
By positioning mode, GPS positioning into a single point positioning and relative positioning (differential positioning). Single point positioning is only one receiver according to the observation data to determine the way the receiver position, it can only use pseudorange measurements can be used for rough travel, etc. navigation. Relative positioning (differential position) is based on two or more receivers of observational data to determine the relative position between the observation points the way, both can be used pseudorange phase measurements can be applied, geodetic or engineering survey shall be phase observations using the relative positioning.
In the GPS observables includes satellite and receiver clock error, atmospheric propagation delay, multipath effects, etc. error, even when in the position calculation by the satellite broadcast ephemeris error, and during most of the public when the relative positioning error was offset or reduced, thus positioning accuracy will be greatly enhanced, dual-frequency receiver can view the two frequency ionospheric measurement error of the atmosphere to offset a major part in the high precision, when the distance between the receiver (there is significant difference between the atmosphere ) should be used in dual-frequency receiver.
