H-RTK F9P Ultralight is an ultra-lightweight RTK GNSS module with U-blox ZED-F9P, an IST8310 compass, and an integrated helical antenna. It is designed specifically for weight-conscious applications where every gram counts. 

The H-RTK F9P Ultralight can receive and track multiple GNSS systems. Owing to the multi-band RF front-end architecture, all four major GNSS constellations (GPS, GLONASS, Galileo, and BDS) can be received concurrently. All satellites in view can be processed to provide an RTK navigation solution when used with correction data.
 
It can be configured for concurrent GPS, GLONASS, Galileo, BDS, QZSS, and SBAS reception to provide a high-performance position reporting and navigation solution. It provides exceptional sensitivity and acquisition times, and interference suppression measures enable reliable positioning even in difficult signal conditions.
 
Feature
U-blox ZED-F9P GNSS module
Ultralight weight at 21.4 gram
Integrated helical antenna
IST8310 compass
 
Specification:
GNSS module
u-blox ZED-F9P
Compass
IST8310
Weight
21.4g
Application
Rover (Aircraft)
Receiver type
■ GPS  L1C/A L2C    ■Galileo  E1 E5b
GLONASS  G2 G1   ■BDS  B1l B2l
Sensitivity
Tracking
-163dBm
Reacquisition
-147dBm
Time-To-First-Fix¹
Cold Start
≤35 s
Warm Start
20s
Hot Start
1 s
Position accuracy²
Autonomous
2.0 m CEP
DGNSS
0.5m CEP
RTK
1cm+1ppm (Horizontal)3
Accuracy of time pulse signal
RMS
30ns
Velocity accuracy
GNSS
0.1 m/s
D-GNSS
0.05 m/s
Operational limits4
Dynamics
≤ 4 g
Altitude
18000 m
Velocity
515 m/s
Baud Rate
38400-230400 bps（Default 115200 bps）
Max navigation update rate
10Hz 
1. All satellites at ≥-130dBm
2. CEP, 50%, 24 hours static, ≥-130dBm, > 8SVs
3. Based on 30km, the accuracy error increases by 1cm every 10km from the base station
4. Assuming Airborne < 4 g platform
 
Pin Map:
No.
Name
I/O
Description
1
VCC
P
Main supply
2
RX1
I
GPS RX1
3
TX1
O
GPS TX1
4
SCL
I/O
I2C Clock（keep open if not used）
5
SDA
I/O
I2C Clock（keep open if not used）
6
RX2
I
GPS RX2
7
TX2
O
GPS TX2
8
GND
G
Ground
 
Dimensions: See in photos 
 
Note: The bottom 3 mounting holes are made for self tapping screws. They are 1.7mm hole with 4mm of depth. 
 
You can use PA2.0*4, or KA2.0*4. But the actual specification of the screw to be used depends on what it is to be installed on and how thick it is. The required torque is about 0.08-0.15N/M.