NDV-735 Miniature GPS/GLONASS Module
The NDV-735 24-channel GPS/GLONASS receiver provides continuous all-in-view navigation satellite tracking. There are three modes of satellite tracking:
The Mode I is system-primary and automatically selected: receiver channels track all GLONASS satellites in view, the rest channels track GPS satellites.
Other modes are available upon pilot selection:
Mode II: tracking of all GLONASS satellites in view;
Mode III: tracking of all GPS satellites in view. The digital receiver computes position, updates ten times a second, measures position to 15 meters RMS, and measures velocity to 0.1 m/s RMS. Main processing functions, handled by the NDV-735 , include:
- GPS position and velocity sensing
- Receiver Autonomous Integrity Monitoring (RAIM), required for Non Precision Approach, Terminal and En Route stages of flight; the Fault Detection and Exclusion Algorithms (FDE) detect and remove erroneous measurements.
- carrier-phase smoothing
- providing digital interfacing
NDV-735 can use real-time RTCM differential correction for GLONASS and GPS. Advanced signal-processing techniques, such as Differential GNSS andKinematics Carrier-Phase Tracking will allow GNSS systems to be certified for Category (CAT) I, II Precision Approaches in the future.
NDV-735 Features
24-channel continuous tracking receiver.Three modes of tracking:
The Mode I is system-primary and
automatically selected: tracking off all
GLONASS satellites in view, free
channels track GPS satellites.
The Mode II: tracking off all GLONASS
satellites in view;
The Mode III: tracking off all GPS
satellites in view.
LI frequency, C/A Code GLONASS and GPS, digital processing (WAAS/EGNOS in future)
Four-dimensional navigation
Expanded digital interfacing capabilities.
PHYSICAL CHARACTERISTICS
Dimensions: 50 x 35 x 13mm
Weight: < 80 g
Connectors: 20 pin (2x10) 2mm pitch
for digital, MMCX for antenna
ELECTRICAL
On-board power supply accepts any
voltage between 2.4V and 5.5V
On-board back up battery saves data for
about 10 years
Typical power consumption is < 0.5W
ENVIRONMENTAL
Operating: –40 °C to +80 °C
Storage: –60 °C to +85 °C
High shock and vibration resistance
INPUT/OUTPUT
Two high speed (115.2 Kbps) standard
RS232 Serial Ports
NMEA0183
1 PPS output (3.3V, 24mA, TTL) synchronized to GPS, UTC, or GlONASS, < 40ns
ACCURACY
Position: 10 meters RMS
Altitude: 15 meters RMS
Velocity: 0.1 m/s RMS (steady-rate)
Time: Universal Coordinated Time to the nearest microsecond
Update rate: Up to 10 Hz update rate for real time position and raw data (code and carrier)
ACQUISITION TIME
Hot Start: <30 s
Cold Start: <150 s
Reacquisition: <1 s
Dynamics
Velocity: 515 m/s
Altitude: up to 18 km
Acceleration: 10G
Jerk: 10 G/s
MTBF
No less 20000 h