Seagull GPK User manual

Seagull #GPK
User Manual
Product: Seagull #GPK
Released: 2021-02-18
FW: 2.1

© 2021 Seagull UAV All Rights Reserved. 2
CONTENTS
GENERAL INFORMATION ................................................................................................................................................................................. 3
CONFIGURING #GPK ....................................................................................................................................................................................... 4
GENERAL.......................................................................................................................................................................................................................... 4
SETTINGS AND VALUES TABLE ....................................................................................................................................................................... 5
FLIGHT CONTROLLER INTEGRATION................................................................................................................................................................ 6
PIXHAWK /PIXRACER /ARDUPILOT BASED FC............................................................................................................................................................ 6
PORT / PIN DEFINITIONS................................................................................................................................................................................. 7
TROUBLESHOOTING........................................................................................................................................................................................ 8
TECHNICAL SPECIFICATIONS.......................................................................................................................................................................... 8

© 2021 Seagull UAV All Rights Reserved. 3
GENERAL INFORMATION
*** Please read this manual thoroughly before connecting and configuring Seagull #GPK ***
Seagull #GPK is an RTK/PPK/MB GNSS receiver which can be used as navigation device for your UAV platform and capable of logging
shutter events from the camera –without requiring external loggers!
#GPK can operate as both BASE and ROVER, depending on the user selection.
Typical precision that can be achieved with #GPK operating in kinematic modes is 1-2.5cm! Results may vary depending on
atmospheric conditions, baseline length, GNSS antenna, multipath conditions, satellite visibility and geometry.
#GPK features:
•High refresh rate –4Hz MB, 5Hz RTK, 10Hz RAW, 10Hz PVT GNSS
•Concurrent GNSS constellations supported –2
•High precision navigation in RTK –2.5cm!
•Internal data logging –RTK / PPK / PVT GNSS
•Event logging –Such as shutter release
•Two operational modes - BASE / ROVER
•Multiple NAV modes: Real Time Kinematic, Post Processed Kinematic, Moving Baseline

© 2021 Seagull UAV All Rights Reserved. 4
CONFIGURING #GPK
GENERAL
#GPK can be configured by “Seagull-GPK-Config.exe” that can be downloaded via the following link:
https://www.seagulluav.com/seagull-gpk-support/
Please use the C USB Port on #GPK to configure.
Seagull #GPK Configurator example photo

© 2021 Seagull UAV All Rights Reserved. 5
SETTINGS AND VALUES TABLE
SETTING NAME
SETTINGS
RANGE
DEFAULT
DESCRIPTION
GENRAL SETTINGS
GPS Function
MANUAL / BASE
/ ROVER
n/a
BASE
This setting defines the #GPK functionality whether
it should be established as base, rover or manually
configured by the user.
Navigation type
RTK / PPK / MB
n/a
RTK
GPS module navigation type whether its Real Time
Kinematic, Post Processed Kinematic or Moving
baseline.
Satellites
GPS and
Glonass / GPS
and Beidou
n/a
GPS /
Glonass
Satellite system to use:
GPS and GLONASS
GPS and BEIDOU
GPK Baudrate
Value
1200 -
960000
115200
Baud rate used for communicating with #MAP-X2 or
other devices that #GPK is connected to.
The baud rate must match the device that #GPK
relates to.
Navigation Frequency
1 –10Hz / AUTO
n/a
AUTO
Navigation rate set for the GNSS receiver. Typically,
it is set to AUTO so #GPK will set the navigation rate
to the maximum possible rate depending on the
navigation type set out.
FEEDBACK SETTINGS
Sync Feedback
DISABLE /
ENABLE
n/a
DISABLE
Enables EVENT PIN logging –only possible when
unit is functioning as ROVER.
Type of Logs
PPK / LLA /
BOTH
n/a
PPK
User can choose what type of log should be
generated –whether Post Processed Kinematic,
LAT/LONG/ALT or both.
IMG Name Prefix
n/a
n/a
DSC
User can define what name should be before
numbering of the logged co-ordinates, only valid for
LLA based logs.
BASE RTK SETTINGS
Survey time
Value in seconds
0 <> *a lot
(9e+15)
300
Auto survey for base lock time frame –will wait and
try to lock precise coordinate for the timeframe set
out to survey for.
Accuracy
Value in meters
0 <> *a lot
(9e+15)
3
Desired auto survey accuracy for the base. Will keep
surveying until the precision is achieved.
BASE FIXED POSITION
Latitude
Value in degrees
0 <> *a lot
(9e+15)
0
(disabled)
Known fixed position needs to be entered for
ultimate precision.
Longitude
Value in degrees
0 <> *a lot
(9e+15)
0
(disabled)
Known fixed position needs to be entered for
ultimate precision.
Altitude
Value in meters
0 <> *a lot
(9e+15)
0
(disabled)
Known fixed altitude needs to be entered for
ultimate precision.
Accuracy
Value in meters
0 <> *a lot
(9e+15)
0
(disabled)
Enter how accurate the coordinates provided are
Latitude + Longitude

© 2021 Seagull UAV All Rights Reserved. 6
FLIGHT CONTROLLER INTEGRATION
PIXHAWK / PIXRACER / ARDUPILOT BASED FC
Connect the #GPK module that is operating in ROVER mode to Pixhawk1, Pixhawk2, Pixracer or other ArduPilot based flight controllers
directly into the GPS marked ports. There is no need to setup any extra configuration, because all the necessary modes are set by
#GPK.

© 2021 Seagull UAV All Rights Reserved. 7
PORT / PIN DEFINITIONS
PORT
DEFINITION
PINS
X2
Port for connecting to #X2 or
other loggers
VIN (3.9 -12V)
TX (3.3V)
RX (3.3V)
GND
COM
Communication port
PURPLE FOR BASE
GREEN FOR ROVER
VIN (3.9 -12V)
TX (3.3V)
RX (3.3V)
GND
FC
Port for connecting to Flight
Controllers
VIN FC (typically 5V do
not exceed 3.9 –12V
limits)
RX (3.3V)
TX (3.3V)
GND
SYNC
EVENT PIN for internal
SIGNAL PIN
ACTIVATED LOGIC 0V
N / C
(NOT
CONNECTED)
GND
Internal logging START/STOP
button.
MCX style antenna connection
port.
Recommended to use
3.3V dual band active
antenna with LNA.
Controller USB and firmware
update port
The unit can be
powered via USB 4.4 –
12V useful when
operating as a BASE
GNSS USB for updating
firmware and manual setting
setup

© 2021 Seagull UAV All Rights Reserved. 8
TROUBLESHOOTING
To determine the current state of Seagull #GPK - simply read the output of the LEDs' and reference it to the table below:
TECHNICAL SPECIFICATIONS
•Ublox NEO-M8P-2 GNSS receiver
•Following signals supported: L1C/A, L1OF, B1I (GPS/GLONASS/ /BEIDOU)
•Refresh rate: up to 4Hz Moving Baseline, 8Hz Real Time Kinematic, 10Hz RAW (Post Processed Kinematic), 10Hz PVT (UBX
Binary)
•Supply voltage: 3.9 –12v (5v recommended –do NOT exceed 12v!)
•Current draw: 100mA AVERAGE
•Dimensions: 42.7mm x 44.5mm x 10.2mm
•Weight: 16g (without misc. cables, antenna etc.)
SD CARD
ACTION
Blinking
Micro SD card - is not present
Flashing rapidly
Micro SD card initialization error –please check format!
Fading
Micro SD card has been initialized and waiting for log to start
Solid on
Micro SD card –logging has been activated
GNSS LOCK
ACTION
Solid on
GNSS lock has been established
Off
No GNSS lock
RTK LOCK
ACTION
Blinking
RTK FLOAT
Solid on
RTK FIXED
Off
No RTK lock