/ / / Technology


What is the Touchstone™ ASIC chip family?

Since 1996, NavCom has developed six different GPS ASIC chips within the Touchstone family. Such enhancements on existing architecture proves both NavCom and Deere's commitment to ongoing GNSS technology development.

What benefit does IntuiTrak™ provide?

NavCom has patents for multipath mitigation, L2 carrier tracking and signal interference suppression. IntuiTrak combines these techniques to provide signal quality that allows innovations such as NavCom's StarFire 5cm-level positioning performance, RTK and RTK Extend.

What benefits does the NavCom binary language provide for RTK?

NavCom's proprietary binary language is exceptionally compact without compromising the resolution of the measurements. This results in very low bandwidth for the RTK communication link without loss of accuracy and precision. It also allows additional information, not included in the RTCM messages, to be transmitted to the rover, providing additional robustness and quicker ambiguity resolution.

What geoid model is used in NavCom's GPS/GNSS receivers?

The current generation of NavCom GPS/GNSS products uses a table of geoid-ellipsoid separation values to convert the computed GPS/GNSS height (relative to the WGS84 ellipsoid) to height relative to mean sea level. The grid points of the table are spaced at 0.5 degrees of latitude and 0.25 longitude and a resolution of cm. A four point interpolation is performed to predict the geoid-ellipsoid separation for the current navigation solution latitude and longitude. Geoid Model derived from Grace Geoid Model data. Grid table data uses combined data from GGM02C and EGM96.  Because of the resolution of the grid table and statistical properties of the EGM96 model, there may be a few meters of error in the predicted geoid-ellipsoid separation value for a specific latitude and longitude. Typical errors are on the order of one meter.

What constellations do Sapphire family products support?

Sapphire, SF-3040, and SF-3050 support GPS and GLONASS constellations with a 67 channel receiver. 1-channel is reserved for StarFire signal tracking, 2-channels support public SBAS signal tracking, 12-channels support either GLONASS G2 (default) or GPS L5 signal tracking, and the remaining 52-channels support GPS L1, L2, L2C, and GLONASS G1 signal tracking. For all-in-view tracking of these two constellations: GPS L1/L2 (24 channels), GLONASS G1/G2 (14 channels), and StarFire, 39 channels are all that is needed. The receiver can also track L2C, but those are not used in navigation and would bring the count up to a maximum of 51 (53 if including SBAS).