CHC X91 is a robust and compact satellite receiver, a candybar, suitable for all types of surveying.

CHC X91 is a robust and compact satellite receiver, a candybar, suitable for all types of surveying.
In use, the receiver is simple and efficient, has intuitive operation and operates in all modes of RTK (Radio, GSM, NTRIP, APIS), which makes it an ideal choice when solving a large number of geodetic tasks.

Chip with 220 channels , satellite antenna, VHF modem, Bluetooth and GSM / GPRS are enclosed in a compact case with dimensions of 180 x 80 mm and weighing 1.35 kg with a battery. CHC X91 tracks all global navigation satellite systems: GLONASS , NAVSTAR GPS , BeiDou , Galileo. 

Intuitive connection both to single base stations, and to networks of reference continuous stations is performed completely automatically. The receiver supports receiving and transmitting corrections to the RTCM standard , which allows it to work without any problems with existing receivers of known manufacturers of satellite surveying equipment. CHC X91 is an efficient and high-quality RTK solution, while still having an affordable price.

The CHC X91 optional receiver is equipped with a connector for connecting an external satellite dish, which allows it to be used as a base station with an antenna installed on the roof of the building, or in difficult conditions when The receiver can be in a protected place, for example, in the backpack of the operator.

Tactical and technical characteristics

Country PRC
Release Date 2013
Number of channels 220
GLONASS: L1C /A, L1P, L2C /A, L2P, L3
BeiDou: B1, B2
Galileo E1, E5A, E5B
RMS Statics in plan 3.0 mm + 0.5 mm /km
RMS Height statics 5.0 mm + 0.5 mm /km
RMS Statics fast in plan 3.0 mm + 0.5 mm /km
RMS Statics Fastest Height 5.0 mm + 0.5 mm /km
RMS PPK in plan 8.0 mm + 1.0 mm /km
RMS PPK Altitude 15.0 mm + 1.0 mm /km
RMS RTK in plan 8.0 mm + 1.0 mm /km
RMS RTK Altitude 15.0 mm + 1.0 mm /km
RMS DGPS in plan 0.25 m + 1.0 mm /km
RMS DGPS in height 0.25 m + 1.0 mm /km
Initialization time, sec ˂10 s
Positioning frequency, Hz 1, 2, 5, option (10, 20, 50)
Initialization reliability ˃99.9%
Number of RS232 interfaces 1
Number of USB interfaces
Number of Ethernet ports
Bluetooth 2.0
Bluetooth 2.1 is
Bluetooth 4.0
EDR support is
Built-in GSM /GPRS modem is
Integrated VHF Modem Rx
Transmission Power, W
Frequency range, MHz 430-450 /450-470
Ability to connect external GSM and VHF modems is
Adjustment Formats RTCM2.1, RTCM2.3, RTCM3.0, RTCM3.2 MSM, CMR, CMR +, sCMRx
Electronic level
Electronic Compass
Outputting format messages NMEA0183
Supported Air Protocols TrimTalk, CHC, Transparent, Trimmark
Recording formats for satellite measurements Write in HCN format, support RINEX 2.x, 3.x
Built-in memory 4GB
Flash memory type
> Flash Memory Size
Size (d, h), mm 180×80
Size (a, b, h), mm
Body Material
Receiver weight, kg 1.35
Working temperature From -40 ° C to +65 ° C
Working temperature in RTK radio mode From +5 ° C to +65 ° C
Storage temperature From -40 ° C to +75 ° C
Dust- and moisture-proof IP67
Shock resistance Keeps working after falling on concrete from a height of 2.0m
Humidity 100%, with condensation
The ability to connect an external GNSS antenna option
External GNSS Antenna Model option (PrinCe Compact, PrinCe Compact2, PrinCe Geodetic)
Power Consumption 3.2 W
Battery Type Li-Ion
Capacity of one battery, mAh 3400
Number of batteries in the receiver 1
Number of batteries in the standard bundle 2
Hot swappable battery option
Time in Statics, in hours 5.0
Time in RTK, in hours 5.0
External power input, V 9.0-18.0
Web Interface
Front panel display
Carrier phase measurement with low noise is
Multi-path suppression technology is