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6.2. A

M+: DETECT

NG AND M

GAT

NTERFERENCE

6.2 AIM+:

Detecting

and

mitigating

interference

The PolaRx5S is equipped with a sophisticated RF interference monitoring and mitigation
system (A

M+). To mitigate the e

ﬀ

ects of narrow-band interference, three notch

ﬁ

lters can

be con

ﬁ

gured in either auto or manual mode. These notch

ﬁ

lters e

ﬀ

ectively remove a narrow

part of the RF spectrum around the interfering signal. The L2 band being open for use by
radio amateurs is particularly vulnerable to this type of interference. The e

ﬀ

ects of wideband

interference both intentional and unintentional can be mitigated by turning on the WB

mitigation system. The WB

system also reduces, more e

ﬀ

ectively than traditionally used

pulse-blanking methods, the e

ﬀ

ects of pulsed interferers.

The spectrum view plot

n the Spectrum window of the GNSS menu, you can monitor the RF spectrum and con

ﬁ

gure

three separate notch

ﬁ

lters to cancel out narrowband interference. Figure 6-2 shows the L2

frequency band with the GPS L2P signal at 1227.60 MHz indicated. Di

ﬀ

erent bands can be

viewed by clicking on the

‘

Show table

’

button as shown. The spectrum is computed from

baseband samples taken at the output of the receiver

’

s analog to digital converters.

Figure 6-2:

The RF spectrum of the L2 Band

Содержание PolaRx5S

Страница 1: ...PolaRx5S User Manual ...

Страница 2: ...rt functions speciﬁc to certain variants While we try to keep the manual as complete and up to date as possible it may be that future features functionality or other product speciﬁcations change without prior notice or obligation The information contained in this manual is subject to change without notice We recommend you to look for new or updated information in our Knowledge Base at https custom...

Страница 3: ...ING AN ANTENNA 13 3 3 CONNECTING TO THE POLARX5S VIA THE WEB INTERFACE 14 3 3 1 Using the USB cable 14 3 3 2 Over WiFi 16 3 3 3 Using the Ethernet cable 18 4 Reference station operation 19 4 1 HOW TO CONFIGURE THE POLARX5S AS AN RTK BASE STATION 19 4 2 CONFIGURING THE POLARX5S NTRIP CASTER 24 4 3 HOW TO OUTPUT A PPS PULSE PER SECOND SIGNAL 27 4 4 HOW TO ENABLE THE NTP SERVER 28 4 5 HOW TO LOG DATA...

Страница 4: ...ING 61 6 2 AIM DETECTING AND MITIGATING INTERFERENCE 63 6 2 1 Narrowband interference mitigation 64 6 2 2 Wideband interference mitigation 65 6 3 HOW TO LOG DATA FOR PROBLEM DIAGNOSIS 67 6 3 1 Support SBF ﬁle 67 6 3 2 Diagnostic Report 69 6 4 ACTIVITY LOGGING 70 6 5 HOW TO USE THE MONITORING FEATURE TO CONFIGURE THE RECEIVER TO POWER DOWN ON LOW VOLTAGE 71 6 5 1 Conﬁguring the monitoring feature 7...

Страница 5: ...onnectors 94 Appendix C Cables 95 Appendix D LED behaviour 96 Appendix E 100 Hz Output Rate 98 Appendix F Real Time ISMR data 99 Appendix G TEC Calibration 100 Appendix H RxTools 105 Appendix I Connecting to the PolaRx5S using RxControl 106 5 ...

Страница 6: ...06 95 EC Low Voltage Directive both amended by the CE marking directive 93 68 EC With regards to EMC these devices are declared as class B suitable for residential or business environment 1 1 2 ROHS WEEE Notice PolaRx5S receivers are compliant with the latest WEEE RoHS and REACH directives For more information see www septentrio com en environmental compliance 6 ...

Страница 7: ...uble isolated construction and must match the speciﬁcations of the provided power supply Statement 2 Ultimate disposal of this product should be handled according to all national laws and regulations Statement 3 The equipment and all the accessories included with this product may only be used according to the speciﬁcations in the delivered release note manual or other documents delivered with the ...

Страница 8: ...te has a dedicated Support section http www septentrio com support where the User Manual the Firmware Reference Guide and the latest oﬃcially supported Firmware version are readily available for download Further information can be found on our website or by contacting Septentrio s Technical Support department In case the PolaRx5S does not behave as expected and you need to contact Septentrio s Tec...

Страница 9: ...he WiFi button to turn the WiFi module oﬀ or on The REF OUT frequency reference output in power critical applications REF OUT can be turned oﬀ with the setREFOUTMode command The following table shows the nominal power consumption measured when 12 VDC is supplied to the PWR connector Conﬁguration Power Consumption GPS GLONASS L1 tracking and PVT 3 5W GPS GLONASS L1 L2 tracking and PVT 3 6W GPS L1 L...

Страница 10: ...65 RohS CE FCC Class B Part 15 2 2 PolaRx5S design 2 2 1 Front panel The front panel layout of the PolaRx5S is shown in Figure 2 1 A description of the front panel sockets as well as their PIN assignments can be found in Appendix A The cables available for use with the PolaRx5S are listed in Appendix C and the LED behaviour is described in Appendix D Figure 2 1 PolaRx5S front panel layout 10 ...

Страница 11: ...n of a back up battery to the ODU PWR connector The battery will only be used in case of an outage of the power over Ethernet The current power source PWR or Ethernet connector and the voltage at the PWR connector are reported in the PowerStatus SBF bock 2 2 4 Power Button When power is initially applied to the PWR or Ethernet connector or after a power outage the receiver always starts up without...

Страница 12: ...the receiver is operating pressing the WiFi button turns WiFi on and oﬀ in turn The red WiFi LED next to the WiFi button lights when WiFi is enabled 2 2 6 Internal memory The PolaRx5 has a 16 GB Memory for internal data logging Data can be logged in SBF RINEX BINEX NMEA or RTCM MSM format and may be retrieved via the âĂŸLoggingâĂŹ menu of the web interface 2 2 7 External memory The PolaRx5S can lo...

Страница 13: ...Front panel power socket The PolaRx5S can also be powered over Ethernet PoE as described in Section 2 2 3 or by supplying 9 to 30 V via PIN 1 of the open ended power cable CBLe_PWR_OE as detailed in Appendix A 8 3 2 Connecting an antenna The rear panel of the PolaRx5S has a TNC connector labelled MAIN to connect a GNSS antenna Connect an antenna to the PolaRx5S using an antenna cable as shown in F...

Страница 14: ...thods 3 3 1 Using the USB cable Connect the USB cable CBLe_USB to the socket labelled COM3 4 USB on the front panel of the PolaRx5S as indicated in Figure 3 3 Figure 3 3 Connecting to the front panel USB socket The ﬁrst time that the USB cable is connected to your pc you may be prompted to allow installation of drivers which can take several minutes When the drivers have been installed it is recom...

Страница 15: ...ctivate the drivers The USB connection on the PolaRx5S functions as network adapter and the DHCP server running on the receiver will always assign the PolaRx5S the IP address 192 168 3 1 To connect to the PolaRx5S you can then simply open a web browser using the IP address 192 168 3 1 as shown in Figure 3 5 Figure 3 5 Connect to the Web Interface of the PolaRx5S over USB using the IP address 192 1...

Страница 16: ...nt panel WiFi button to turn on the WiFi modem When active the red WiFi led will be lit On your PC or tablet search for visible WiFi signals the PolaRx5S identiﬁes itself as a wireless access point named PolaRx5S serial number The serial number of the PolaRx5S can be found on an identiﬁcation sticker on the receiver housing Select and connect to the PolaRx5S as shown in Figure 3 7 Figure 3 7 Selec...

Страница 17: ...n your PC has connected to the PolaRx5S WiFi signal you can open a web browser using the IP address 192 168 20 1 as shown in Figure 3 8 Figure 3 8 Connect to the Web Interface of the PolaRx5S over WiFi using the IP address 192 168 20 1 on any web browser 17 ...

Страница 18: ...g a DHCP server The IP address assigned to the receiver will be associated with the hostname PolaRx5S xxxxxxx where xxxxxxx are the 7 digits of the serial number of the GNSS Receiver Board GRB inside the PolaRx5S This number can also be found on an identiﬁcation sticker on the receiver housing You can then make a connection to the receiver using the web address http PolaRx5S xxxxxxx Figure 3 10 sh...

Страница 19: ... be selected in the Position window of the Station menu as shown in Figure 4 1 Figure 4 1 Setting the PolaRx5S base station position to static Set the correct position An accurate position of the antenna that is connected to the PolaRx5S should also be set The default setting of auto can be used for demonstrations however for most other purposes a properly surveyed position is advisable In the exa...

Страница 20: ...CM3 output to start the sequence of conﬁguration steps RTCMv3 is the most compact and robust diﬀerential correction format and it is recommended to use this format where possible Select the Ethernet port you wish to use avoiding the commands port 28784 the webserver port 80 the FTP port 21 as well as the default NTRIP port 2101 and the NTP port 123 The example shown in Figure 4 3 uses port 28785 T...

Страница 21: ... them you can now connect to the conﬁgured Ethernet port of the PolaRx5S using a terminal emulator tool such as Data Link The Ethernet IP address you need can be found in the information bar at the top of the web interface In the example shown in Figure 4 4 the IP address is 192 168 105 246 Figure 4 4 The IP address of the PolaRx5S can be found on the information bar Data Link is part of Septentri...

Страница 22: ...the Data Link terminal emulator tool to connect to the PolaRx5S Ethernet port over which diﬀerential corrections have been conﬁgured When connected to the output correction stream click on the Show Data button on Data Link and you should see output similar to that shown in Figure 4 6 Figure 4 6 The RTCMv3 diﬀerential correction stream output from the IPS1 Ethernet connection of the PolaRx5S 22 ...

Страница 23: ...ed in this example using Data Link the Data Streams ﬁeld on the Corrections Output window should now show the active blue connection shown in Figure 4 7 and the corrections output icon in the information panel should appear active Figure 4 7 Web Interface showing diﬀerential corrections output over an Ethernet connection 23 ...

Страница 24: ...wish to send correction data the default port is 2101 Click on New mount point as indicated in Figure 4 9 Select Yes to enable the mount point and give it a name This is the name that will appear in the caster source table Up to 3 mount points can be deﬁned each with a diﬀerent name You can also select the type of Client authentication for the mount point none any client can connect without loggin...

Страница 25: ...ﬁne at least one user The user name and password are the credentials needed for the NTRIP client rover to access the correction stream In the Client Users section click on New User as shown in Figure 4 10 Enter a User Name and Password for the user and select the mount points that they will have access to Up to 10 NTRIP clients can log in as a particular user Click Ok to apply the settings Figure ...

Страница 26: ... GGA message to the caster as was the case in Figure 4 12 then their position will also be visible Figure 4 11 Connecting as a client to the PolaRx5S NTRIP Caster On the NTRIP Client side Rover receivers can connect to the NTRIP Caster by entering its IP address and Port as shown in Figure 4 12 After clicking Ok the mount point source table will be ﬁlled and a mount point can be selected The user ...

Страница 27: ... rear panel of the PolaRx5S Step 2 Conﬁgure the PPS settings You can conﬁgure the PPS settings on the Timing window of the GNSS menu as shown in Figure 4 14 Figure 4 14 PPS conﬁguration ﬁeld in the web interface The Interval is the time interval between successive timing pulses and is selectable between 10 ms and 10 s The default Polarity of the PPS signal is a low to high transition which can be ...

Страница 28: ...e PPS generation time which is extrapolated from the last available PVT information may start to drift To avoid large biases the receiver stops outputting the PPS pulse when the last available PVT is older than the speciﬁed MaxSyncAge The MaxSyncAge is ignored when TimeScale is set to RxClock Step 3 Click on Ok to apply settings The new conﬁguration can also be saved as the boot conﬁguration by cl...

Страница 29: ...here are two options either the receiver stops logging when the memory is full or it continues logging by making space for new ﬁles by deleting the oldest The default setting is Delete oldest Figure 4 16 Selecting what you wish to happen when the internal 16 GB memory is full Step 2 Conﬁguring a logging session On the Log Sessions window of the Logging menu you can check which logging sessions hav...

Страница 30: ...ternal Disk and Never for Auto Delete have been selected In the Edit SBF Stream window the messages required for RINEX generation have been selected as well as those useful for the Support department for diagnosing problems SBF messages can also be selected individually Figure 4 18 Follow the sequence of windows to fully conﬁgure the logging session Please note that this setting is overruled by th...

Страница 31: ... the Log Sessions window will show a summary of the deﬁned logging sessions as in Figure 4 19 An estimate of the daily size of data generated with the current logging conﬁguration is also given Figure 4 19 A summary of the newly deﬁned logging sessions showing the expected amount of data generated daily 31 ...

Страница 32: ...rnal memory device connected the new device should be visible in the Log Sessions window as shown in Figure 4 21 If the device is not formatted or the formatting is not compatible with the receiver ﬁle system you will be prompted to format the device This can be done by clicking on the Format button Figure 4 21 With a 2 GB external USB memory device connected to the PolaRx5S New logging sessions c...

Страница 33: ...d in the Edit Session window after conﬁguring SBF or RINEX logging as shown in Figure 4 23 FTP push will create the folder data on the remote server if it does not yet exist If ﬁle transfer fails the receiver will retry after the Retry Interval which has been selected as 15 minutes in this example Figure 4 23 Conﬁgure pushing of RINEX ﬁles to an external FTP server You can check that the FTP serve...

Страница 34: ... PolaRx5S both on its internal memory and to an external USB device can be downloaded using the web interface on the Disk Contents window of the Logging menu Each logging session is logged to a separate folder Individual ﬁles can be downloaded by clicking on the green download arrow next to the ﬁle name as shown in Figure 4 25 If you need to download multiple ﬁles from the receiver it may be more ...

Страница 35: ...how to connect using FTP with FileZilla over both the USB connection 192 168 3 1 and over Ethernet PolaRx5S 3010305 The DSK1 folder contains data ﬁles logged on the internal memory while DSK2 contains ﬁles logged to an external device Figure 4 26 Downloading logged data ﬁles using the PolaRx5S FTP server with a FileZilla client DSK1 ﬁles logged on the internal memory DSK2 ﬁles logged on an externa...

Страница 36: ... 6 HOW TO ACCESS LOGGED DATA Figure 4 27 Downloading logged data ﬁles using the FTP server with Windows File Explorer DSK1 ﬁles logged on the internal memory DSK2 ﬁles logged on an external USB device 36 ...

Страница 37: ... them from being deleted To conﬁgure POEL create a new log session as described in Section 4 5 and select Type âĂŸPreserve on EventâĂŹ Currently âĂŸEventsâĂŹ refers to hardware events a voltage transition registered by either the Event A or the Event B pins Data can be preserved from x minutes before until y minutes after event as shown in Figure 4 28 The maximum amount of time data can be preserv...

Страница 38: ...ull The ﬁles in unused or disabled log sessions are ﬁrst to be deleted The receiver then scans the enabled low priority sessions The oldest ﬁle in these sessions is identiﬁed and deleted If no ﬁle could be deleted the receiver scans the medium priority sessions and ﬁnally it will scan the high priority sessions Preserved ﬁles are the last to be deleted but in case the disk ﬁlls with preserved ﬁles...

Страница 39: ...g to Server Note that it is disabled by default Once the server is enabled all the other P2PP settings can be conﬁgured as shown in Figure 4 30 The Port option allows to select the COM port to be used for the point to point communication Next the client and server IP s will need to be set The ClientIP sets the IP address that will be given to the client remote from the receiver s perspective when ...

Страница 40: ...assword needs to be set in order to successfully conﬁgure this feature Figure 4 31 Enabling P2PP authentication Finally Connect Timeout determines the maximum amount of time in seconds that a connection attempt may consume before being refused Meanwhile Activity Timeout sets the maximum time in seconds that a connection may be idle no data transfer before it is disconnected When a timeout occurs t...

Страница 41: ...lternative to FTP for RINEX or SBF ﬁle submission from the PolaRx5S receivers and supports OpenAM for authentication To learn more about the CloudIt feature and learn how to set it up please check the knowledge base on the Septentrio website 41 ...

Страница 42: ...RxLogger Septentrio provides the RxTools suite of GUI tools among which is RxLogger The RxLogger tool provides an easy and convenient way to log and monitor ISMR data from the PolaRx5S A short description of the various RxTools and how to install them can be found in Appendix H This section details how to use RxLogger for ISMR ﬁle generation 5 2 1 Connecting To the Receiver The ﬁrst time you run R...

Страница 43: ... receiver Raw data high rate phase and amplitude and low rate support data are stored in SBF Septentrio Binary Format Raw data ﬁles will be referred to as SBF ﬁles in the remainder of this chapter In the main window of RxLogger on the Global tab select the directory where data ﬁles will be logged In the example shown in Figure 5 2 data will be stored in the folder C Users dean DATA 43 ...

Страница 44: ...rectory will be created under the directory speciﬁed in the Global tab with the name being formed from a concatenation of the two digit year number and the 3 digit day of year Within each of the daily directories the hourly SBF ﬁles follow the IGS ﬁle naming convention ssssdddf yy_ yy two digit year f file sequence character within day A 1st hour 00h 01h B 2nd hour 01h 02h X 24th hour 23h 24h ddd ...

Страница 45: ...ion name designator as SEPT Figure 5 4 shows an example of data ﬁles logged on February 26 2016 The ﬁles with the 16_ extension are SBF ﬁles containing the raw data from the receiver The ﬁles with the 16_ ismr extension are the post processed ﬁles containing the scintillation indices Section 5 2 4 describes how to conﬁgure post processing actions Figure 5 4 An example of hourly SBF and ISMR ﬁles l...

Страница 46: ... following SBF blocks should be logged At an interval of 20ms 50Hz IQCorr At an interval of 1s 1Hz MeasEpoch MeasExtra At an interval of 10s ReceiverStatus ChannelStatus ReceiverSetup At an interval of OnChange GPSNav GLONav GALNav BDSNav QZSNav Click the Add Stream button to add a new column in the window Figure 5 5 Select the SBF blocks and logging rates needed for ISMR ﬁle generation The MeasEp...

Страница 47: ...g action From there you can select ISMR Conversion from the drop down list as shown in Figure 5 6 Then click on Next Figure 5 6 Selecting automatic generation of ISMR ﬁles from SBF data ﬁles On the ISMR Parameters page shown in Figure 5 7 you can select the desired phase detrending cut oﬀ frequency the default is 0 10 Hz You may want to reduce the number of columns in the ISMR ﬁle if for example y...

Страница 48: ...sion of SBF to ISMR format After clicking Next you can select then select which compression to apply to the ISMR ﬁle As these ﬁles are typically small 200kbytes ﬁle compression is not normally required Figure 5 8 Selecting not to compress the generated ISMR data ﬁles 48 ...

Страница 49: ...l select the default settings as shown in Figure 5 9 This will store the ISMR ﬁles in the same directory as the raw SBF ﬁles Figure 5 9 Storing the generated ISMR ﬁles in the default location alongside the logged raw SBF ﬁles On the ﬁnal conﬁguration window shown in Figure 5 10 you are prompted to enter a name for the post processing action and a description The name used is for information only a...

Страница 50: ...tart Logging to start data logging 5 2 5 Monitoring logging and ISMR status In the Logger Info window of the Status tab of the main window of RxLogger as shown in Figure 5 11 you can follow the progress of the logging and post processing and get a snapshot of the ISMR indices Figure 5 11 The Logger Info ﬁeld gives summary information on the ISMR indices as well as logging and post processing Data ...

Страница 51: ...new post processing action as shown in Figure 5 12 This time in the Post Process Action Input and Type window just click Next as there is no conversion to apply You can now select the compression program you wish to use Figure 5 12 Add a second post processing action As before enter a name and description of this new post processing action and click Finish Make sure to check the Remove Source File...

Страница 52: ...ser s home directory Thus the conﬁguration steps described above need only be carried out once 5 2 8 Starting RxLogger from the command line RxLogger can be launched from the command line as shown in Figure 5 14 Figure 5 14 Launching RxLogger from the command line Rxlogger starts in the conﬁguration as stored in the rxlogger conf ﬁle The A command line option causes RxLogger to immediately start l...

Страница 53: ...0 8 1462 540360 10 00000074 232 30 48 0 0 045 0 022 0 019 0 024 0 030 0 031 0 031 3 654 0 047 14 184 0 022 13 899 0 027 13 575 0 021 14 460 0 017 4270 0 4262 37 6 1 4 1462 540360 23 00000074 231 68 48 0 0 039 0 000 0 018 0 023 0 029 0 031 0 031 5 799 0 074 6 616 0 005 7 006 0 003 6 473 0 005 8 339 0 010 11954 0 11948 37 7 1 2 1462 540360 17 00000074 152 15 48 0 0 037 0 000 0 017 0 022 0 028 0 030 ...

Страница 54: ...E5 Use E5AltBOC as third Galileo signal type default is E5b Note that multiple s options can be provided e g sC2B2a sE3E6 V Display the version of sbf2ismr h Display this help screen Format of the ISMR output file Note The default signals available the ISMR file are as follows Other signals can be selected with the s option Sig1 L1CA for GPS GLONASS SBAS QZSS E1 for GALILEO B1I for BeiDou and L5 f...

Страница 55: ...ol 54 AvgCCD on Sig3 average of code carrier divergence meters Col 55 SigmaCCD on Sig3 standard deviation of code carrier divergence meters Col 56 Sig3 lock time seconds Col 57 SI Index on Sig3 dimensionless Col 58 SI Index on Sig3 numerator only dB Col 59 p on Sig3 phase spectral slope in the 0 1 to 25Hz range dimensionless Col 60 T on Sig1 phase power spectral density at 1 Hz rad 2 Hz Col 61 T o...

Страница 56: ...ple SVID values in the range 1 37 refer to GPS satellites You can ﬁnd the full list of satellite constellation SVID ranges in the SBF Outline section of the PolaRx5S Reference Guide Supported Signals For each satellite the ISMR ﬁle contains iono indices S4 Phixx for up to three signals as listed in the table below The signals in italic can be selected with the s option of sfb2ismr Satellite system...

Страница 57: ...10 30 and 60 seconds More speciﬁcally Phi01 is the average of the 60 standard deviations computed over 1 s intervals during the last minute Phi03 is the average of the 20 standard deviations computed over 3 s intervals during the last minute Phi10 is the average of the 6 standard deviations computed over 10 s intervals during the last minute Phi30 is the average of the 2 standard deviations comput...

Страница 58: ...tion TGD1 TGD2 transmitted by BeiDou satellites is applied QZSS L1CA L2C The correction TGD transmitted by QZSS satellites is applied SBAS L1CA L5 Uncorrected IRNSS Only one frequency L5 of IRNSS satellites is available so not possible to determine TEC values For GPS the TEC is based on the P code measurements as opposed to the C A code on L1 and L2 There is therefore no need for correction of the...

Страница 59: ...gth Columns 31 45 and 59 provide the opposite of the slope often denoted p of the phase PSD in log log axes where the PSD is obtained by computing the FFT of the 3000 detrended phase samples in the last minute The slope is computed by ﬁtting a linear polynomial to the PSD over the 0 1 to 25 Hz frequency range The ﬁgure below illustrates the way the slope is computed In the example depicted p is ab...

Страница 60: ...7 0 23 0 09 R08 42 39 2 L1CA 16188 49 1 0 17 0 07 0 11 L2CA 14929 46 8 0 17 0 07 0 08 S38 23 L1CA 65534 44 5 0 80 0 06 0 45 R23 13 76 5 L1CA 13454 44 2 0 27 0 15 0 08 L2CA 13475 40 3 0 31 0 23 0 08 R12 22 75 8 L1CA 2787 47 7 0 23 0 08 0 11 L2CA 2546 42 7 0 21 0 08 0 09 R07 13 73 5 L1CA 25367 42 7 0 43 0 17 0 10 L2CA 20359 42 4 0 27 0 10 0 08 S33 32 L1CA 20553 42 3 0 83 0 08 0 50 R10 38 80 4 L1CA 1...

Страница 61: ...the receiver board and the voltage supplied is also shown The icons to the right of the information bar show that in this example the position of the receiver is ﬁxed the overall signal quality is Excellent 5 out of 5 bars and the receiver is logging both internally Int Logging and to an external USB memory device Ext Logging The Corrections icon indicates that diﬀerential corrections are being se...

Страница 62: ... line that there are no satellites from that particular constellation in tracking More information can be found in the Satellites and Signals page on the GNSS menu The Logging ﬁeld summarises the current logging sessions and disk capacities The complete logging information and conﬁguration windows can be found via the Logging menu The Data Streams ﬁeld gives and overview of the data streams into g...

Страница 63: ...deband interference both intentional and unintentional can be mitigated by turning on the WBI mitigation system The WBI system also reduces more eﬀectively than traditionally used pulse blanking methods the eﬀects of pulsed interferers The spectrum view plot In the Spectrum window of the GNSS menu you can monitor the RF spectrum and conﬁgure three separate notch ﬁlters to cancel out narrowband int...

Страница 64: ...de as shown conﬁgured for Notch1 in Figure 6 3 the region of the aﬀected spectrum is speciﬁed by a centre frequency and a bandwidth which is eﬀectively blanked by the notch ﬁlter Figure 6 3 Conﬁguring the ﬁrst notch ﬁlter Notch1 at 1235 MHz With the Notch1 settings as shown in Figure 6 3 the L2 band after the notch ﬁlter After IM is shown in Figure 6 4 with the blanked section clearly visible Figu...

Страница 65: ...m devices such as chirp jammers The wideband interference mitigation system WBI of the PolaRx5S can reduce the eﬀect of both types of interference on GNSS signals Conﬁguring WBI mitigation The Wideband Interference Mitigation system WBI can be enabled by selecting on as shown in Figure 6 5 Enabling WBI will increase the power consumed by the PolaRx5S by about 160 mW Figure 6 5 Select on to enable ...

Страница 66: ...the eﬀect of the interference is dramatically reduced to the extent that the small signal bump at the GPS L1 central frequency of 1575 MHz is clearly visible as Figure 6 7 shows In this particular test the interference signal caused the receiver to fall back to the less precise DGNSS or standalone positioning modes With WBI mitigation enabled however the receiver was able to maintain an RTK ﬁx pos...

Страница 67: ...ing a new logging session On the menu bar select Logging then the Log Sessions window where you can deﬁne a new logging session Figure 6 8 Click on the Create button to start deﬁning a new logging session Step 2 Select to log the Support data blocks In the Edit Session window click on SBF Logging and New SBF stream as usual In the ﬁnal Edit SBF Stream ﬁeld make sure to select the Support option as...

Страница 68: ...ing session selecting Support in the Edit SBF Stream ﬁeld When logging has been correctly conﬁgured the Log Sessions window will show the newly deﬁned session as active as indicated in Figure 6 10 Figure 6 10 The Log Sessions window showing an active logging session 68 ...

Страница 69: ...igure 6 11 Click on the download icon next the SBF ﬁle you want to download Figure 6 11 Click on the green download icon to next to the ﬁle you want to download 6 3 2 Diagnostic Report A Diagnostic Report can be generated under the Admin About tab on the Web interface as shown in Figure 6 12 and saved to your PC Figure 6 12 Generate a Diagnostic Report 69 ...

Страница 70: ...ver Messages window of the Admin menu that can be used to check the receiver operations The example in Figure 6 13 shows that four 15 minute SBF ﬁles have been successfully FTP pushed to a remote location Figure 6 13 Receiver events reported by the PolaRx5S in the Receiver Messages window 70 ...

Страница 71: ...ely 0 22W 6 5 1 Conﬁguring the monitoring feature Step 1 Deﬁne a voltage threshold and standby time On the menu bar select âĂŸStationâĂŹ and then âĂŸPower ModeâĂŹ Next click on the âĂŸMonitoringâĂŹ tab Here you can conﬁgure the voltage threshold and deﬁne how long the receiver should remain in standby before attempting to wake up again as shown in Figure 6 14 If the voltage level is still below th...

Страница 72: ...re 6 15 Note that if the current voltage is lower than the threshold value deﬁned in step 1 the receiver will not go into standby immediately but will display a warning and wait for 30 seconds allowing the user to save the conﬁguration to boot or increase the threshold value Figure 6 15 Saving the conﬁguration to boot after conﬁguring the Monitoring feature Note that the receiver will not attempt ...

Страница 73: ...1 Conﬁgure a new Wake Up Schedule On the menu bar select âĂŸStationâĂŹ and then âĂŸPower ModeâĂŹ Next click on the âĂŸSchedulingâĂŹ tab Here you can conﬁgure a full âĂŸWake Up ScheduleâĂŹ as shown in Figure 6 16 Figure 6 16 Overview of the Wake Up Schedule The Wake Up schedule allows you to conﬁgure both the length of the period the receiver should be awake and whether or not this wake up period s...

Страница 74: ...e example shown in Figure 6 17 this is set to 10 minutes Step 3 Deﬁne the repetition period Next determine how often the receiver needs to wake up for the previously conﬁgured period of time If you wish for the receiver to wake up just once leave the Repetition Period option at its default value of âĂŸNo RepetitionâĂŹ The example shown in Figure 6 17 shows a receiver which is conﬁgured to wake up ...

Страница 75: ...ent conﬁguration to boot This is because when waking up from standby or sleep the receiver will apply the boot conﬁguration which at this point does not contain the recently conﬁgured changes Figure 6 18 Figure 6 18 Upon applying the changes the receiver will show a warning suggesting to copy the current conﬁguration to boot Note that you can also conﬁgure the receiver to wake up at a certain poin...

Страница 76: ...nitoring feature with a Wake Up Schedule In this case when the receiver is scheduled to be awake but the voltage level is below the threshold value deﬁned in the monitoring tab the receiver will remain in standby but will periodically attempt to wake up in order to check the voltage level Conversely during time periods for which the receiver is scheduled to sleep the receiver will not attempt to w...

Страница 77: ...will lead the receiver to remain in standby but periodically check the voltage level when the receiver is scheduled to be awake but the voltage level is below the threshold value When the receiver is scheduled to sleep the receiver will not attempt to wake up to check the voltage levels 77 ...

Страница 78: ...olaRx5S In the example shown in Figure 7 2 Web Interface Anonymous users without password can connect to the receiver via the web interface as Viewers They can browse the various windows but cannot change any of the settings Only George who has User access can change receiver settings via the web interface FTP Anonymous users have full access over FTP so can download and delete logged data ﬁles IP...

Страница 79: ... 7 2 Deﬁning user access levels After deﬁning the Users Viewers and their access levels they can login on the web interface by clicking on Log in on the upper right corner as shown in Figure 7 3 Figure 7 3 Logging in to the PolaRx5S web interface 79 ...

Страница 80: ...cess can be limited by conﬁguring user access as described in Section 7 1 For added security user authentication for SFTP and rsync access can be conﬁgured using an SSH public key When an SSH key is deﬁned the conﬁgured user can download ﬁles using SFTP or rsync without entering a password provided of course that the matching private key is known by the key agent running on the same PC You can gen...

Страница 81: ...xt that can be pasted directly into the SSH Key ﬁeld of the PolaRx5S Web Interface as shown in Figure 7 6 Figure 7 6 Logging out 521 bit ECSDA keys oﬀer the best security however ECSDA 256 and 384 bit keys can also be used Alternatively RSA 512 and 1024 key encryption is also supported 81 ...

Страница 82: ... the IP Ports menu In the example shown in Figure 7 7 Ethernet ports 2101 2102 and 2103 are accessible but only from devices with the IP address 84 199 9 148 Similarly all WiFi ports are open but only those from IP 84 199 9 148 Please note that the ﬁrewall settings do not apply when connecting to the web interface using USB In the case of WiFi ﬁrewall settings only apply when the receiver is in Wi...

Страница 83: ...hown in Figure 8 1 In Static mode the receiver will not attempt to request an address via DHCP but will use the speciﬁed IP address netmask gateway domain name and DNS DNS1 is the primary DNS and DNS2 is the backup DNS In DHCP mode the arguments IP Netmask Gateway Domain DNS1 and DNS2 are ignored Having entered the settings click on Ok then Apply And Reboot in the pop up dialog as shown as the rec...

Страница 84: ...ternet service provider ISP If the IP address is dynamic then it may change over time resulting in a loss of connection Dynamic DNS DynDNS or DDNS is a service that addresses this problem by linking a user deﬁned hostname for the device to whichever IP address is currently assigned to it To make use of this feature on the PolaRx5S you should ﬁrst create an account with a Dynamic DNS provider dyndn...

Страница 85: ...etime of the receiver Permission ﬁles enable additional features on the PolaRx5S and can be purchased from our sales department Step 1 Select the suf ﬁle and start the upgrade The upgrade procedure is started by clicking on the Choose ﬁle button in the Upgrade window of the Admin menu and which is highlighted in Figure 8 4 Figure 8 4 Selecting the suf ﬁle to upload to the receiver Having already s...

Страница 86: ...2 Verifying the upgrade If there were no problems with the upgrade the message Upgrade successful will appear You can then check on the Admin About window as shown in Figure 8 6 that the new ﬁrmware version or permission ﬁle has been updated Figure 8 6 Checking the ﬁrmware and permission ﬁle versions 86 ...

Страница 87: ...ith saved conﬁguration after a power cycle Figure 8 7 Setting the PolaRx5S to its default conﬁguration 8 5 How to reset the PolaRx5S If the PolaRx5S is not operating as expected a simple reset may resolve matters The PolaRx5S can be fully power cycled by disconnecting then reconnecting the power supply However on the Admin Reset window as shown in Figure 8 8 diﬀerent functionalities can be reset i...

Страница 88: ...of a PolaRx5S can be easily saved to a PC as a text ﬁle A saved conﬁguration can then be uploaded to any other PolaRx5S Step 1 Downloading the conﬁguration from a PolaRx5S Click the green download arrow next the conﬁguration you wish to download as shown in Figure 8 9 The conﬁguration will be saved as a txt ﬁle Figure 8 9 Saving a conﬁguration from a PolaRx5S as a text ﬁle 88 ...

Страница 89: ...ion to another PolaRx5S Again on the Admin Conﬁguratoins window click on the blue upload arrow as indicated in Figure 8 10 to upload a conﬁguration ﬁle stored on you PC In this example the saved ﬁle will be uploaded as the Boot conﬁguration Figure 8 10 Uploading a conﬁguration to a PolaRx5S 89 ...

Страница 90: ...7 pin connector provides access to the ﬁrst serial port COM1 The receiver behaves as Data Terminal Equipment DTE PIN Description 1 Not connected 2 Signal ground GND 3 Not connected 4 Not connected 5 Receive Data RXD input to the receiver 6 Transmit Data TXD output from the receiver 7 Not connected A 2 COM2 This 7 pin connector provides access to the second serial port COM2 The receiver behaves as ...

Страница 91: ...t connected 2 GND 3 COM4 RX 4 COM4 TX 5 COM3 RX 6 COM3 TX 7 Leave unconnected USB device This mode is selected by applying 5V DC to pin 7 PIN Description 1 Not connected 2 GND 3 USB D 4 Reserved 5 USB D 6 Reserved 7 USB Vbus A 4 Ethernet The receiver can be powered through the Ethernet port Power Over Ethernet Please note that only mode A as speciﬁed in the 802 3af standard is supported on the Pol...

Страница 92: ...e setEventParameters command 6 EVENTB input 0 30V pulled down Input voltage should be at least 3V to be detected as high Second input for external event timing Event polarity is controlled by the setEventParameters command 7 ANT_EXT external antenna power Can be used to apply an external supply voltage to the antenna The voltage applied to ANT_EXT VANT determines the voltage source on the MAIN con...

Страница 93: ...8 PWR PIN Description 1 Power 9 to 30V DC 2 Always ON When this pin is tied to pin 1 the receiver is always on regardless of the state of the power button Connect to Ground to enable the power button 3 Ground 93 ...

Страница 94: ... damage the receiver When using a splitter to distribute the antenna signal to several receivers make sure that no more than one output of the splitter passes DC Use DC blocks otherwise B 2 PPS OUT BNC xPPS output 5V output impedance 50 Ω The rate and polarity of the xPPS output signal can be speciﬁed by the setPPSParameters command or on the Web Interface The pulse duration is 5ms B 3 REF OUT BNC...

Страница 95: ...Colour 1 Reserved Orange 2 Ground Green 3 Reserved Yellow 4 nRST_IN Black 5 EVENTA Red 6 EVENTB Purple 7 ANT_EXT Brown Do not leave the red and purple wires ﬂoating tie them to ground if not used This will avoid crosstalk eﬀects that could lead to spurious level transitions on the EVENTA and EVENTB inputs CBLe_USB 201202 USB device cable to be connected to the COM3 4 USB connector CBLe_USB_HOST 21...

Страница 96: ... be conﬁgured as LOGLED using the setLEDMode command In rover PVT mode when acting as DIFFCORLED this LED reports the number of satellites for which diﬀerential corrections have been provided in the last received diﬀerential correction message RTCM or CMR Behaviour conﬁgured as DIFFCORLED Number of satellites with corrections Oﬀ No diﬀ corr received On The LED is solid ON when the receiver outputs...

Страница 97: ... Behaviour PVTLED green Oﬀ No PVT available On PVT available WIFILED red Oﬀ WiFi disabled On Access point mode or client mode Blinking slowly Establishing a connection in client mode Blinking quickly Error not connected 97 ...

Страница 98: ...ier phase modulo 65 536 cycles To be able to reconstruct the full carrier phase at 100 Hz i e to ﬁx the 65 536 cycle ambiguity it is suﬃcient to log the MeasEpoch SBF block at a lower rate e g 1 Hz The sfb2ismr program with the r option can be used to recover full carrier phase and correlation values from a SBF ﬁle containing 100 Hz IQCorr blocks and 1 Hz MeasEpoch blocks See Section 5 3 3 for det...

Страница 99: ...acked satellites and signals except GPS L1P and L2P and GLONASS L2P and are made available in the ISMR SBF block Using the RxControl graphical interface it is possible to view the S4 and σφ indices in real time This is enabled in the View Time Plots Scintillation Indices Plot menu An example of real time S4 view is shown below 99 ...

Страница 100: ...a TEC calibration with respect to SBAS sbf2ismr must be invoked with the as option To use the Klobuchar model as a reference the ak option must be used When using Klobuchar as a reference only the satellites tracked between 00 00 and 06 00 local time are considered to avoid times of increased ionospheric activity The Klobuchar parameters are decoded from the GPS navigation messages In regions cove...

Страница 101: ...gate to the Navigation Positioning Mode SBAS Corrections menu and make sure the receiver is conﬁgured in MixedSystems navigation mode 5 Under the Logging RxControl Logging SBF menu enable the following SBF blocks for logging MeasEpoch PVTGeodetic GEOCorrections GPSNav GPSIon GLONav GALNav GEONav QZSNav BDSNav ChannelStatus and ReceiverSetup 101 ...

Страница 102: ...6 In the File Naming tab select manual ﬁle naming and provide a ﬁle name 102 ...

Страница 103: ...n a command window and run sbf2ismr in TEC calibration mode On Windows sbf2ismr exe can usually be found under C Program Files x86 Septentrio RxTools bin In regions covered by an SBAS system use the option as to generate TEC calibration values using SBAS ionospheric corrections as reference Otherwise use the option ak For example assuming that the path to the log ﬁle collected in step 7 is Q TECCa...

Страница 104: ...The output of sbf2ismr can be copied into a TEC calibration ﬁle without modiﬁcation and this ﬁle can be provided as TEC calibration input with the C option of sbf2ismr see Section 5 3 1 104 ...

Страница 105: ...cluding ASCII RINEX and KML SBF Analyzer allows users to generate time plots from SBF ﬁles for detailed analysis It can also create standard reports for reporting purposes RxLogger allows ﬂexible logging of SBF and NMEA data Users can select multiple streams each with a diﬀerent update rate RxPlanner is a Satellite Mission Planning software It shows the satellite visibility and DOP at the user deﬁ...

Страница 106: ...in the Start menu of your PC In the File menu select Change Connection In the example shown in Figure I 2 a USB cable was used The USB connection of the PolaRx5S maps onto two virtual serial connections which are identiﬁed as USB COM Port 1 and USB COM Port 2 Select one of these connections and give it a name When connected to a receiver the various information ﬁelds in RxControl will be ﬁlled as ...

Страница 107: ...107 ...

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