|
|
Return to the Table of
Contents
|
Objective: Present the general system architecture and data flow
*GRIM is owned and copyrighted by the XYZs of GPS, Inc
|
We will go through the system diagram from the perspective of software and data flow so you can see how information flows through the system. This is for both the transmitter side and receiver side.
We will provide some examples using programs Hydra.exe and DynaPos.exe. The primary focus will be on the GPS Receiver Interface Module (GRIM™) - one has been installed at the transmitter side (Hagerstown) for compression and data logging and one on the receiver side (user) to get data out of the user’s GPS receiver. The most basic feature that the GRIM provides on the modulation side (Hagerstown) is data compression. GRIM compresses that data and hands it over to the modulator. As a secondary function, GRIM archives measurement data at Hagerstown for later comparison with received data. These data can be used for post-processing also.
At least one more GRIM is located at the rover site to decompress the received Hagerstown data.
Return to the Table of Contents
 |
TFHRC Home | FHWA
Home | Feedback
United States Department of Transportation - Federal Highway Administration |