Your trusted partner
8 years of experience accumulated, to create a professional instrument and equipment supply platform, products cover forestry, agriculture and other fields
The products of reputation testing instruments have passed ISO9001: 2008 quality system certification
All instruments are supplied at factory prices, giving users affordable prices, professional quality, and guaranteed quality
Professional team provides 24-hour online service to solve customer's difficult problems
Install and open the NAVA GPS OFFICE software on your computer, and connect to a GPS device to import and export data.
At present, the most commonly used satellite phones are the Eurostar, Iridium and Maritime Satellite systems. Their billing methods are more complicated. Simply put, they have both domestic and international cards.
Handheld GPS FAQ
The common feature of Beidou Haichao and satellite phones is that they are communication tools in the blind zone.
The Beijing 54 coordinate system and the Xi'an 80 coordinate system are actually a transformation of ellipsoidal parameters. As such transformations, the transformations in the same ellipsoid are strict, and the transformations between different ellipsoids are not strict. So there is no set of conversion parameters that can