Kolida K20s User manual

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KOLIDA K20s Positioning System
User Guide

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Contents
Contents.....................................................................................................................................- 2 -
ChapterⅠBrief Introduction ...................................................................................................- 4 -
§1.1 Introduction...............................................................................................................- 4 -
§1.2 Applications...............................................................................................................- 4 -
§1.3 Features .....................................................................................................................- 4 -
ChapterⅡHardware Structure.................................................................................................- 7 -
§2.1 Components of The Receiver....................................................................................- 7 -
§2.1.1 Front Panel .....................................................................................................- 7 -
§2.1.2 Side View......................................................................................................- 10 -
§2.1.3 Lower Housing............................................................................................. - 11 -
§2.2 Physical Key Operation........................................................................................... - 11 -
§2.2.1 Front OLED Interface................................................................................... - 11 -
§2.2.2 Mode Select..................................................................................................- 12 -
§2.2.3 Datalink Setting............................................................................................- 16 -
§2.2.4 System Setting..............................................................................................- 20 -
§2.2.5 WIFI Config .................................................................................................- 24 -
§2.2.6 Datalink Info (only for Base/Rover).............................................................- 26 -
§2.2.7 Config Mode.................................................................................................- 27 -
§2.2.8 Power Off .....................................................................................................- 28 -
ChapterⅢWeb UI Configuration ..........................................................................................- 29 -
§3.1 Overview.................................................................................................................- 29 -
§3.2 Web UI main interface.............................................................................................- 30 -
§3.2.1 Status............................................................................................................- 32 -
§3.2.2 Configuration................................................................................................- 33 -
§3.2.3 Satellite Information.....................................................................................- 39 -
§3.2.4 Data Record..................................................................................................- 42 -
§3.2.5 Data Transfer................................................................................................- 43 -
§3.2.6 Network Config............................................................................................- 48 -
§3.2.7 Radio Config ................................................................................................- 53 -
§3.2.8 Firmware Update..........................................................................................- 54 -
§3.2.9 User Management.........................................................................................- 57 -
§3.2.10 Help............................................................................................................- 57 -
ChapterⅣData Collector T17N.............................................................................................- 58 -
§4.1 Basic introduction to the handheld..........................................................................- 58 -
§4.2 Software installation and connecting.......................................................................- 63 -
ChapterⅤAccessories...........................................................................................................- 65 -
§5.1 Instrument Case and Accessories ............................................................................- 65 -
§5.2 Portable Power Package..........................................................................................- 67 -

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§5.3 Other Cables and Accessories .................................................................................- 67 -
ChapterⅥMeasuring Operation ............................................................................................- 69 -
§6.1 Static Operation.......................................................................................................- 69 -
§6.1.1 Static Measurements Profile.........................................................................- 69 -
§6.1.2 Operating Procedures ...................................................................................- 70 -
§6.1.3 Field Operation Notes...................................................................................- 70 -
§6.1.4 GPS Net Design............................................................................................- 71 -
§6.1.5 Antenna Height Measurement......................................................................- 72 -
§6.2 RTK measurement...................................................................................................- 74 -
§6.2.1 By using radio (Internal radio) .....................................................................- 74 -
§6.2.2 By using radio (external radio).....................................................................- 84 -
§6.2.3 By using internet (GPRS).............................................................................- 86 -
§6.2.4 By using internet (WIFI) ..............................................................................- 90 -
§6.2.5 Inertial Measurement (IMU) .....................................................................- 92 -
§6.2.6 Radio Router.................................................................................................- 95 -
Appendix A KOLIDA K20S technical specifications .............................................................- 96 -
Appendix C Technical Terms ..................................................................................................- 99 -
FCC Statement ......................................................................................................................- 100 -

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ChapterⅠBrief Introduction
In this chapter you will have a brief knowledge of KOLIDA Company and K20s
measurement system.
§1.1 Introduction
Welcome to KOLIDA Instruments Co., Ltd, which is China‟s leading manufacturer of surveying
equipment including GNSS receivers and Total Stations, etc. To know more about KOLIDA,
please visit our official website http://www.kolidainstrument.com/.
In the guide, we'll show you how to operate the K20s RTK system as well as the accessories. We
recommend you to read the guide carefully before getting started.
§1.2 Applications
Control Survey: In static measurement with dual frequency K20s we can get high accuracy
result, which is valuable in deformation monitoring and control point measurement.
Highway Survey: In RTK measurement with K20s, we can use K20s to do the work such as road
survey, topo survey, mapping, cross section measurement and so on.
CORS Connection: K20s can provide stable and convenient network data communication with
all the CORS system.
Data Acquisition: Along with KOLIDA field survey software (app), K20s can have a quick and
accurate data acquisition.
Stakeout:Along with KOLIDA field survey software(app), K20s can achieve point stakeout, line
stakeout and CAD stakeout.
Power Survey:The anti-interference feature of K20s enables us to do the powerline survey.
Marine Survey:K20s can connect to echo sounder to do the marine survey.
§1.3 Features
Intelligent Platform
Combining Linux system and KOLIDA cloud service, K20s is an intelligent system. Users are
able to do register, upgrade and configurations by remote.

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Bluetooth
Equipped with Bluetooth 4.0 module, K20s is able to build stable BT connections with both
android and windows mobile devices.
WiFi
WIFI AP mode enables us to access to K20s' WEB UI and WIFI client mode enables K20s to
connect to Internet downloading corrections.
Advanced Built-in UHFModule
K20s UHF module supports all the mainstream radio protocols in the market; and also supports
radio router and radio repeater functions.
Speed Dial
Based on Linux platform and PPP dial up technology, K20s can have a fast and stable network
connection.
Intelligent Interaction
We have two ways to access to K20s's WEB UI to config receivers, by WIFI and by USB
network port mode.
Attractive OLED Display
1" colorful OLED screen can display K20s‟ working status.
Smart Voice Guide
K20s now supports, English, Chinese, Turkish, Korean, Spanish, Russian, Portuguese voice
guide. In the future, we'll support more language.
Full Constellations Tracking
Featuring a 440 channels GNSS board, K20s can track and process all the existed satellite

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constellations. With the utility of BEIDOU (COMPASS) signal, the data acquisition speed and
GNSS signal stability are greatly improved from old generation technology.
IMU Survey
Thanks to the inertial measurement technology, K20s allows user to do a tilt survey in 2-4cm
accuracy with a maximum tilt angle of 60 °. Centering is not a must and magnetic environment
won't effect on the accuracy of tilt survey.
Large capacity power support
10000mAh Non-removable battery enables K20s to work 14 hours after 6 hours' charging.
Intelligent Storage
K20s can store raw data in formats such as STH, Rinex2.01 and Rinex3.02. The internal 8G
memory ensures large size data collection. And OTG function allows K20s to use external flash
disk for data storage.
The maximum storage rate is up to 50Hz.
Amazing Housing
With innovative design, K20s's shell is using magnesium alloy materials.
NFC Function
The NFC chip enables the quick touch and BT connection between controller and K20s.
Cloud Service
The cloud service can achieve real time online upgrade, register and remote check.

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ChapterⅡHardware Structure
In this chapter, we can have knowledge on K20s hardware structure and basic
function.
§2.1 Components of The Receiver
K20s size is 163mm in diameter and 96mm in height. The whole shell is made of magnesium
alloy material, which makes K20s more rugged and durable. Two physical buttons and one
1-inch OLED screen in the front panel makes K20s easy to operate.
§2.1.1 Front Panel
Ref
Component
Description
①
Indicators
Indicates the working status for receiver
②
F Key
Page up/down, selection button
③
Power Key
Power on/off receiver, confirm button
④
OLED Display
Display the working mode and status of receiver
①
②
④
③

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Indicators
The indicators are located at the left side of front panel, for details meaning please check the table
below.
Display and main interface
Power on K20s, and after initialization, K20s will access to the skyplot interface while detecting
satellites. And then we will hear the voice indication about the current working mode. And 10
seconds later, the interface will switch to display coordinates and other information such as
skyplot, the number of satellites and PDOP value.
Component
Description
WIFI
Flashes in red to indicate that WIFI hotspot is broadcasting normally
as AP mode.
DATA
UHF mode: Flashes in red to indicate that the signal is
receiving/transmitting with the interval
Network mode: 1) Fast flashes in red to indicate that the receiver is
dialing; 2) Flashes in red with the signal receiving/transmitting
interval after successful dial
WiFi mode: 1) Fast flashes in red to indicate that the receiver is
establishing WiFi connection; 2) Flashes in red with the signal
receiving/transmitting interval after successful connection
REC
Flashes in red to indicate that static data collection is ongoing
BT
Keeps in red to indicate that Bluetooth connection is established
PWR
Keeps in red to indicate the remaining power is enough. Flashes in
red to indicate the remaining power is not enough, and K20s needs
to be charged.

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Coordinates page
Skyplot page
Ref
Component
Description
①
Battery symbol
Display the remaining power in real-time
②
Coordinates
Display the coordinates
③
Solution/Message type
In base mode, it will display the base's transmitted
correction message type; in rover mode, it will display the
rover's current solution
④
Message symbol
The message symbol will appear automatically if receiver
gets something error, such as error message. Press F key
to read the message and press F key again to cancel
⑤
Temperature
Display the temperature of receiver in real-time
⑥
WiFi symbol
Display the WiFi status, when it shows , that
means the receiver is establishing WiFi connection as
WIFI client, and if the WIFI successfully connected the
①
③
⑤
②
⑨
⑥
⑧
⑩
⑦
④

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symbol will change to be ; when it shows ,
that means the receiver is broadcasting its WIFI hotspot
(We recommend to turn it off while unused.)
⑦
Data link symbol
K20s will indicate the current used datalink at this
location. means internal UHF mode and the current
channel, means the GPRS mode, means
dual-emitting mode, means externl device mode
⑧
Skyplot
Display the satellites distribution
⑨
Satellites
The value under Sats indicates the number of satellites
⑩
PDOP
Display current PDOP value
§2.1.2 Side View

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§2.1.3 Lower Housing
Ref
Component
Description
①
SIM card Slot
Where we can insert a SIM card when the receiver is
set in GPRS mode
②
Serial number of the
receiver
Apply for a registration code, Bluetooth ID
③
Voice indicator
Mode setting and working status prompt
④
7-pin port
USB port, OTG interface and Ethernet port
⑤
5-pin port
Power supply, differential correction communication
and serial port to access K20s'receiver data
⑥
UHF Port
Insert UHF antenna
§2.2 Physical Key Operation
§2.2.1 Front OLED Interface
After K20s is powered on, press F key once to access to the configuration interface, where we
can do Mode Select, Set Datalink, System Option, WIFI Config, UHF Info, Config Mode, Power
Off and Quit.
③
②
①
④
⑤
⑥

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Press F key to move the config option from one to another, and press Power key to confirm.
§2.2.2 Mode Select
In the configuration interface, press F key to access Mode Select option and press Power key to
confirm. And then we can set the working mode as Base, Rover and Static.
Static Mode Setting
Press F key to select Static mode in Mode Select Interface and press Power key to confirm.
And then press power key again to access Record Option where we can set the point name,
antenna height, sample interval, record mode and data type.
What we should do in the next is setup all the parameters for static mode. Press power key once
and enter Record Option page, all the parameter items are displayed here including point name,

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antenna height, sampling interval, record mode and data type.
Site: this is point ID for static, and it is the last 4 digits from serial number, but you can edit it if
you choose this item, there are 0-9 and A-Z for each digit.
Ant.Hgt: This is the antenna height measure from ground point to measurement tape
Interval: This is the sampling rate for raw data storage
Rec.Mode: Auto indicates to collect static data automatically when the environment is OK;
Manual indicates to start collection manually.
DataType: This is used to choose the data format for raw data storage, such as STH, Rinex2.01
and Rinex3.02
Press F key to move to Edit option and press power key to confirm, here you can select the item
to edit by pressing F key. For example, press F key to move to Data type item and press power
key to setup what kind of data format we are going to record, press F key to move to Rinex2.x or
Rinex3.x and press power key to confirm, after that, press F key to move to OK option and press
Power key to finish setting and return to the coordinate/skyplot page.
After the receiver starts to record static data, the recording information (file size, recording time
and the epochs) will show on the screen.
File Size: Real-time display the size of data file
Rec.Time: Real-time display the recording time
Epochs: Real-time display the quantity of epochs receiver already obtained
NOTE: Please make sure the static parameters are the same when there are several
receivers to collect static data at the same time.

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Base Mode Setting
Press F key to select Base mode in Mode Select Interface and press Power key to confirm.
Start Base Option
This option is to set up base transmission parameters.
Base Mode: Manual, Repeat and AutoBase for optional to start the base station.
Diff Type: This is the correction format which base support to transmit, there are RTD,
RTCM23, RTCM30, RTCM32,CMR, SCMRX for optional.
MaskAngle: The minimum GPS satellite elevation angle permitted by a particular receiver
design. Satellites below this angle will not be used in position solution. 10-15 degree mask angle
is recommended.

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Record Option
This is used to set raw data collection parameters for base station.
Rover Mode Setting
Press F key to select Rover mode in Mode Select Interface and press Power key to confirm.
Rover Setting
This is used to configure the mask angle and SBAS satellite view for rover receiver
Mask Angle: The minimum GPS satellite elevation angle permitted by a particular receiver
design. Satellites below this angle will not be used in position solution. 10-15 degree mask angle
is recommended.
SBAS SV: This is used to control the rover receiver to track the SBAS system or not.

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Record Option
This is used to set raw data collection parameters for rover station.
§2.2.3 Datalink Setting
KOLIDA K20s is integrated with built-in UHF radio module, cellular module, bluetooth and
WIFI, etc. K20s also can connect to external radio. When datalink is not used, we can close
datalink to save power.
In the configuration interface, press F key to access Set Data Link option and press Power key to
confirm. And then we can set the data link as UHF, Cellular Net, Bluetooth, Dual Transmitting,
WIFI, External(radio) and Close datalink.

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UHF Setting
After selecting UHF option and in the configuration interface, we can set the channel, air baud
rate, communication protocol and power for internal UHF.
Channel: This is the communication channels for internal UHF, the value of the channel must
be the same in both Base and Rover.
Air Baud Rate: This represents the radio transmission rate of data, the higher value, the bigger
size of data can be transmitted per second. 9600 is the recommended air baud rate to use.
Protocol: This is radio communication protocol for data transmission, SOUTH and TRIMTALK
are optional in this page and SOUTH is the default setting, if it is changed, Base and Rover must
use the same protocol for communication.
Power: This appears only in Base mode, the radio transmitting power is allowed to define in
High, Middle or Low power.

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Cellular Net Setting
This mode is to use the internal cellular module that connects to internet and access to reference
station for the corrections.
Dual Transmitting Mode
This mode enables Base station to transmit corrections by internal UHF and cellular net at the
same time.
Bluetooth Mode Setting
This mode enables rover to access the reference station for corrections by the internet of data
collector.

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WIFI Datalink Setting
This is to use WIFI as the datalink that connect to the internet and access to reference station for
corrections.
External Device
This mode enables receiver to connect external radio.
Close Datalink
This option is used to turn off all of the transmission method for development and customization,
usually we keep all the datalink activated.

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§2.2.4 System Setting
In the configuration interface, press F key to access System Option and press Power key to
confirm. And then we can do configurations including Language setting, Voice option,
self-check, online service, Online Option, Other Option and Copy Static File items.
Language
In language interface, we can set the receiver language into Chinese, English, Russian, Korean,
Spanish, and Portuguese, Etc.
Voice Option
In voice option interface, we can set the voice indication and volume.