Product overview
The Shenzhen JND Technology Co., Ltd JND ST-91-GNL provides positioning, tracking and navigation functions for integration into flight-control systems and other electronic equipment. Its UAV applications include model aircraft, quadrotors, hexarotors and other multirotors. The hardware is a single-sided surface-mount receiver module suitable for secondary SMT assembly, built around the eighth-generation UBX-M8030 chipset. Integrated LNA, SAW and flash components accompany a KDS 0.5PPM TCXO and an RTC crystal. Flash storage retains configuration commands through power loss.
Integration options include selectable UART/TTL or USB2.0 output, configurable NMEA sentence combinations and a 1Hz–10Hz refresh rate. The default serial rate is 9600bps, with selectable rates extending to 921600bps. User-selectable pedestrian, vehicle, stationary, portable and airborne profiles accompany 2D and 3D positioning settings. Satellite quality controls, position-drift software settings and AssistNow Online and Offline support provide further configuration options. Positioning PPS indicator support distinguishes the pre-fix state, with the light on or off, from the flashing indication after a fix.
Specifications
| Specification | Value & conditions |
|---|---|
| Product type | ST-91-GNL single-frequency, dual-mode GNSS receiver module. |
| Receiver chipset | Eighth-generation UBX-M8030. |
| Integrated components and configuration retention | Integrated LNA, SAW and flash; stored configuration commands are retained after power loss. |
| Assembly architecture | Single-sided surface-mount construction supporting secondary SMT assembly. |
| Manufacturing process | Lead-free manufacturing process; RoHS compliant. |
| Output interfaces | Selectable UART/TTL or USB2.0 output. |
| Reference oscillator | KDS 0.5PPM high-precision TCXO. |
| Data output rates | 9600bps default; selectable rates: 1200, 2400, 4800, 19200, 38400, 57600, 115200, 230400, 460800 and 921600bps.9600bps default. |
| Navigation output protocol | NMEA 0183 V3.0: GGA, GSA, GSV, RMC, VTG and GLL.User-configurable output sentence combinations. |
| RTC hardware | Built-in RTC crystal. |
| Refresh rate | 1Hz–10Hz.Adjustable data refresh rate. |
| Satellite quality controls | Configurable satellite quality controls and software settings to reduce position drift. |
| Operating profiles | Pedestrian, vehicle, stationary, portable and airborne modes; 2D and 3D positioning.User-selectable application and positioning modes. |
| Positioning PPS indicator support | Supports a positioning PPS indicator with fix-dependent behavior.Before a position fix, the indicator remains on or off; after a fix, it flashes. |
| Assisted positioning | Supports A-GPS services including AssistNow Online and AssistNow Offline. |
| Navigation engine | Mixed navigation engine supporting GPS, GLONASS, BeiDou, GALILEO and SBAS, including WAAS, EGNOS, MSAS and GAGAN. |
| Intended UAV applications | Intended for high-update-rate flight-control model aircraft, UAVs, quadrotors, hexarotors and other multirotor aircraft. |
