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C-Nav Hardware Reference Guide

The following table describes some of the statistical formulas and measures commonly used for
GNSS positional accuracy measurement:

Table 1-1: Common Accuracy Measures Used with GPS

*(Mikhail, 1976) †(Langley, 1991) **(National Geodetic Survey, 1986)

Common Values Used with GNSS

•

Speed of light ….. c = 299792458 meters per second

•

L1 frequency …... f

= 1575420000 Hz

•

L2 frequency …... f

= 1227600000 Hz

•

avelength ……. λ = c/f (meters per second)

•

L1 wavelength …. λ

= 0.190293672798 meters

•

L2 wavelength …. λ

= 0.244210213425 meters

Measurement

Dimension

Statistical

Measure

Abbreviation Probability Approximation

Related

Expressions

Root Mean

Square

rms

68.3%*

MSE – mean

square error

(the square of

the rms)

Probable

Error

50%*

0.674 σ**

N/A

Error

Ellipse

N/A

39.4%*

Defined by σ

, σ

& correlation

N/A

Circular

Error

Probable

CEP

50%*

Radius:

0.589 (σ

+ σ

CPE – also

called circular

probable error

Twice

Distance

Root Mean

Square

2drms

Varies, 95.4

– 98.2%

†

Radius: 2σ

†

σ = √ σ

+ σ

, less

common

definition: 2

dimensional
rms (circle’s

radius 1 σ)

Error

Ellipsoid

N/A

19.9%*

Defined by:

, σ

correlations

N/A

Spherical

Error

Probable

SEP

50%*

Radius:

0.513 (σ

+ σ

SEP – also

called

spherical

probably error

Содержание IALA

Страница 1: ...DGNSS Systems Hardware Guide www cnavgnss com...

Страница 2: ...381 8973 South America Rio de Janeiro Sales 55 21 8082 3736 Rio de Janeiro Support 55 21 7629 9606 Peru 51 1 365 7964 Africa South Africa 27 21 705 2741 Angola 244 222 330202 Asia Singapore 65 629 59...

Страница 3: ...port normal operational hours are 7am to 5pm Monday through Friday U S Central Standard Time In addition our regional offices can provide first line support for the C Nav DGNSS System Please reference...

Страница 4: ...tion Service 14 L band Correction Signal 15 Chapter 2 Installation Guide 17 C Nav Antenna Installation Notice 17 Standard Antenna Installation 17 Antenna Location 17 Antenna Installation 19 Coaxial Ca...

Страница 5: ...oaxial Cable 75 Terminating Coaxial Cable Times Microwave Systems 75 Coax Seal Weather Sealant Installation 79 Chapter 6 Glossary 83 Troubleshooting 83 Abbreviations 86 Definitions 89 List of Tables T...

Страница 6: ...Nav1010 NAV82 001018 0001LF Radiation Pattern 45 25 35 Figure 3 17 C Nav1010 NAV82 001003 0001LF Antenna and Mounts 25 36 Figure 3 18 C Nav1010 NAV82 001003 0001LF Radiation Pattern 25 36 Figure 3 19...

Страница 7: ...NaviGator II rev A front USB port model Outline Diagram mm 61 Figure 4 1 Huber Suhner Model No 3403 17 0045 64 Figure 4 2 Huber Suhner Model No 3402 17 0070 66 Figure 4 3 Moxa TCC 80I Converter Dimens...

Страница 8: ...factor with traditional DGNSS Another is that the accuracy of the mobile user s position will be degraded as the baseline distance separation between the reference station and the mobile user increas...

Страница 9: ...vers will correct the raw pseudorange for the ionospheric delay The simplest correction employs an internal diurnal model of these delays For Single Frequency L1 only GNSS users the parameters can be...

Страница 10: ...ns within the Earth Centered Earth Fixed World Geodetic System 1984 WGS84 ellipsoid and Cartesian coordinate system GNSS receivers internally transform the Cartesian data into degrees Latitude and Lon...

Страница 11: ...velength L2 0 244210213425 meters Measurement Dimension Statistical Measure Abbreviation Probability Approximation Related Expressions 1D Root Mean Square rms 68 3 MSE mean square error the square of...

Страница 12: ...communication links to satellite uplink stations at Laurentides Canada Perth Australia Burum The Netherlands Santa Paula California Auckland New Zealand and Southbury Connecticut for rebroadcast via t...

Страница 13: ...ked up by dedicated communications lines but in fact the network is sufficiently dense that the reference stations effectively act as back up for each other If one or several fail the net effect on th...

Страница 14: ...ubscription service The user pays a subscription which licenses the use of the service for a predetermined period of time Subscriptions can be purchased for any predetermined period of time and are av...

Страница 15: ...C Nav signals from six 6 separate and independent geo stationary communication satellites The Satellite Based Augmentation System SBAS signals obtained from geo stationary communication satellites ar...

Страница 16: ...he L band Communication Satellite Locator HTML utility http www cnavgnss com calculator Table 1 3 C Nav3050 Satellites Firmware Version 1 0 1 5 and Earlier Network Satellite ID Longitude Satellite Nam...

Страница 17: ...f the sky to an elevation angle of 7 if possible Obstructions below 15 elevation generally are not a problem though this is dependent on satellite availability for the local region Avoid placing the a...

Страница 18: ...software with a recent satellite almanac to assess the impact on satellite visibility at your location An L Band Communication Satellite Locator tool is available on C Nav s website to aid in determi...

Страница 19: ...C Nav3050 Antennas require an Antenna Mounting Adaptor supplied The threads of all antenna mounting poles are 1 14 in size 2 Install the antenna with the antenna mounting pole in the predetermined loc...

Страница 20: ...C Nav Hardware Reference Guide 20 Figure 2 3 C Nav Antenna Mounting Pole Dimensions...

Страница 21: ...relation to attenuation loss at the frequencies in use For best performance do not allow more than 7dB 18dB for C Nav1000 of cable loss between the antenna and the receiver lower elevation satellite t...

Страница 22: ...sen route to further detect any potential kinks bends or spots where the cable may become damaged 5 Secure the cable along the cable route with tape or zip ties and place a label at the GNSS receiver...

Страница 23: ...ightning install a properly grounded in line electrical surge suppressor between the GNSS receiver and antenna Install protective devices in compliance with local regulatory codes and practices Protec...

Страница 24: ...ce Guide 24 Chapter 3 C Nav DGNSS Hardware Specifications C Nav3050 C Nav3050 Receiver Figure 3 1 C Nav3050 Base Plate Dimensions Without Mounting Brackets Figure 3 2 C Nav3050 Base Plate Dimensions W...

Страница 25: ...D 96 98 EC Table 3 2 C Nav3050 I O Messages Table 3 3 C Nav3050 Connector Assignments Control Commands Input Only C Nav proprietary commands contact C Nav Support for more information Differential Cor...

Страница 26: ...z Phase Centre see Figure 3 3 GPS L1 66mm 2 60in GPS L2 65mm 2 56in Polarization Right Hand Circular RHCP Pre Amplifier 39dB gain 2dB Noise Figure 2 6dB max Impedance 50 Ohms VSWR RL 2 0 1 14dB return...

Страница 27: ...on NGS test results NGS does not currently provide GLONASS calibrated values To achieve the greatest level of accuracy the absolute phase center values must be incorporated into your processing Phase...

Страница 28: ...C Nav Hardware Reference Guide 28 Figure 3 5 C Nav3050 Airborne P N NAV82 001022 3001LF Antenna Dimensions Figure 3 6 C Nav3050 Base P N NAV82 001021 3001LF Antenna Dimensions...

Страница 29: ...ower elevation satellites are always more difficult to track There is a 5dB variation between 35 and 0 elevation factor 3x Figure 3 8 C Nav3050 Base Antenna Radiation Pattern Optimal antenna performan...

Страница 30: ...C Nav Hardware Reference Guide 30 C Nav1010 C Nav1010 Receiver Figure 3 9 C Nav1010 Receiver without Mounting Brackets Figure 3 10 C Nav1010 Receiver with Mounting Brackets...

Страница 31: ...Dust MIL STD 810F Method 510 4 Procedure I Dust 6h 1750 175ft min blowing dust at 10 6 7g m at 25 C and 70 C Sand MIL STD 810F Method 510 4 Procedure 2 90 mins 18 29m s blowing sand at 2 2 0 5g m from...

Страница 32: ...Band Rejection 20dB 250MHz RF Power Handling 30dBm 1 W Input Voltage 2 5 24 VDC Power Consumption 0 2W 39mA 10mA 5VDC Cable Connector TNC Female Operating Temp 55 C to 85 C Altitude 70 000ft 21 336m F...

Страница 33: ...Nav1010 L band Antenna Specifications 45 25 Part Number P N NAV82 001018 0001LF 45 25 Frequency 1525 1575 MHz INMARSAT StarFire Polarization Right Hand Circular RHCP Pre Amplifier 34dB gain min Noise...

Страница 34: ...radome impact abrasion UV solvent skydrol resistant and fire retardant Weight 5 2oz 146g Vibration 30g s Designed to FAA TSO C144 DO 160D D0 228 MIL C 5541 MIL I 45208A MIL STD 810 AND SAE J1455 Wind...

Страница 35: ...ht Hand Circular RHCP Pre Amplifier 25dB gain min to coax end Noise Figure 1 0dB typical Impedance 50 Ohms Input Voltage 3 0 to 5 5 VDC Power Consumption 0 3W typical 8 5mA 10mA 3 6VDC Cable Connector...

Страница 36: ...C Nav Hardware Reference Guide 36 Figure 3 17 C Nav1010 NAV82 001003 0001LF Antenna and Mounts 25 Figure 3 18 C Nav1010 NAV82 001003 0001LF Radiation Pattern 25...

Страница 37: ...C Nav Hardware Reference Guide 37 C Nav2050 C Nav2050 Receiver Figure 3 19 C Nav2050 Front View Figure 3 20 C Nav2050 Top View...

Страница 38: ...5 non condensing Table 3 14 C Nav2050 I O Messages Table 3 15 C Nav2050 Connector Assignments NCT Proprietary Data PVT Raw Measurement Satellite Messages Nav Quality Receiver Commands NMEA 0183 Messag...

Страница 39: ...re 3 22 C Nav2050 RS 232 to DP RS 422 MOXA Converter MOXTCC 801 The C Nav2050 chassis ground is internally connected to the power ground thus the Isolation Mount Adaptor may be needed when using DC po...

Страница 40: ...A 5VDC Cable Connector TNC Female Operating Temp 55 C to 85 C Altitude 70 000ft 21 336m Finish Fluid resistant Ultem UV stable Table 3 17 C Nav2050 Airborne Antenna Part Airborne Antenna Part Number 8...

Страница 41: ...ues must be incorporated into your processing Phase center information on this antenna is found on the antenna bottom and in the figure below Figure 3 24 C Nav2050 Standard Antenna Phase Center Dimens...

Страница 42: ...performance is realized at elevations greater than 30 There is a 10dB variation between 0 and 90 elevation factor 10x therefore lower elevation satellites are always more difficult to track There is...

Страница 43: ...coax end Noise Figure 1 0dB typical Impedance 50 Ohms Input Voltage 3 0 to 5 5 VDC Power Consumption 0 3W typical 8 5mA 10mA 3 6VDC Cable Connector TNC Female Cable Length 3 meters Operating Temp 40 C...

Страница 44: ...Antenna LNA Wide band Response Optimal antenna performance is realized at elevations between 10 and 50 There is an 8dB variation between 40 and 90 elevation factor 6 3x therefore higher elevation sat...

Страница 45: ...C Nav Hardware Reference Guide 45 C Nav1000 C Nav1000 Receiver Figure 3 32 C Nav1000 Receiver Front View mm Figure 3 33 C Nav1000 Receiver Top View mm Figure 3 34 C Nav1000 Receiver Clearance Area...

Страница 46: ...av Hardware Reference Guide 46 Figure 3 35 C Nav1000 RS 422 to DP RS 232 MOXA Converter MOXTCC 801 C Nav1000 Display Figure 3 36 C Nav1000 Display Front View mm Figure 3 37 C Nav1000 Display Top View...

Страница 47: ...Specifications Input Voltage 4 0 13 VDC Input Current 50 60 mA Mechanical Specifications Enclosure PVC plastic Dimensions 128 mm square x 84 mm high 5 06 square x 3 33 high Weight 450 g 1 0 lb Mountin...

Страница 48: ...ence Guide 48 C Nav1000 Display Mounting Options Gimbal Mount Figure 3 40 Gimbal Mount Clearance Area Panel Mount Figure 3 41 Panel Mount Frame Dimensions mm Figure 3 42 Clearance Distance Behind the...

Страница 49: ...C Nav Hardware Reference Guide 49 Figure 3 43 Panel Mount Hole Dimensions mm Figure 3 44 Panel Mounting C Nav1000 Display Figure 3 45 C Nav1000 Display Panel Mounted...

Страница 50: ...32C and RS 422 Data Connector DB9 Socket Data Port Baud Rate 2400 4800 or 9600 Baud Data Output Format RTCM SC 104 NMEA 0183 Data Input Protocol NMEA 0183 Power Specifications Item Specification Input...

Страница 51: ...rdware Reference Guide 51 Figure 3 46 MBX 4 Receiver with Mounting Bracket Top Mounted Figure 3 47 Bottom view MBX 4 With Mounting Bracket Bottom Mounted Figure 3 48 IALA Receiver Mounting Bracket Dim...

Страница 52: ...ions Item Specification Frequency Range 283 5 325 kHz Gain 20 dB Pre Amplifier Integral Low Noise Amplifier Power Specifications Item Specification Input Voltage 10 14 VDC supplied by receiver Input C...

Страница 53: ...re Reference Guide 53 C NaviGator II C NaviGator II Control and Display Unit Figure 3 49 C NaviGator II Display Front View Figure 3 50 C NaviGator II Side panel Connectors Figure 3 51 C NaviGator II P...

Страница 54: ...nnector Conxall Micro Con X 16282 2SG 311 Input Voltage 90 264 VAC Power 60 W Frequency 47 63 Hz Output Voltage 12 VDC 5 Operating Temperature 0 C 40 C Storage Temperature 20 C 65 C Humidity Operating...

Страница 55: ...unting holes on the back of the C NaviGator Figure 3 53 RAM Double Socket Arms RAM D 201U C RAM Double Socket Arm SHORT 3 63 RAM D 201U RAM Double Socket Arm MEDIUM 6 88 RAM D 201U E RAM Double Socket...

Страница 56: ...v Hardware Reference Guide 56 Option 2 Desktop Stand Figure 3 55 Flat Screen Table Stand for C NaviGator II CHIFSB018BLK Option 3 Wall Mount Figure 3 56 Tilting VESA Wall Mount for C NaviGator II PEES...

Страница 57: ...nt Use this adaptor if unable to secure display from the back Appropriate hardware is included to secure the C NaviGator to the Front Panel Mount prior to mounting Bolt thread size is M4 x 6mm Figure...

Страница 58: ...ling the C NaviGator to a rack The 19 Rack Mount takes up 7U of rack space and is 12 in height Appropriate hardware is included to secure the C NaviGator to the Rack Mount prior to mounting Bolt tread...

Страница 59: ...rence Guide 59 Figure 3 59 C NaviGator II side USB port model Outline Diagram mm Both inside and outside mounting holes on vesa mount are M4 x 16mm in size Inside holes have 75mm spacing Outside holes...

Страница 60: ...0 Figure 3 60 C NaviGator II Cut out Diagram mm Cut out Panel includes hardware to facilitate bolting of the C NaviGator from the rear via M4 x 16mm sized bolts 6 places or from the front via M4 or 10...

Страница 61: ...C Nav Hardware Reference Guide 61 Figure 3 61 C NaviGator II rev A front USB port model Outline Diagram mm...

Страница 62: ...as tap water may leave mineral spots Eyeglass cleaner can also be used if absolutely necessary however it may contain some alcohol which could dry out the screen and cause it to go cloudy Use a soft...

Страница 63: ...C Nav Hardware Reference Guide 63 Chapter 4 Hardware Accessories Huber Suhner Lightning Protectors Model No 3403 17 0045 Specifications...

Страница 64: ...C Nav Hardware Reference Guide 64 Model No 3403 17 0045 Dimensions Figure 4 1 Huber Suhner Model No 3403 17 0045...

Страница 65: ...C Nav Hardware Reference Guide 65 Model No 3402 17 0070 Specifications...

Страница 66: ...C Nav Hardware Reference Guide 66 Model No 3402 17 0070 Dimensions Figure 4 2 Huber Suhner Model No 3402 17 0070...

Страница 67: ...C Nav Hardware Reference Guide 67 Huber Suhner Lightning Protector Mounting Instructions...

Страница 68: ...C Nav Hardware Reference Guide 68...

Страница 69: ...C Nav Hardware Reference Guide 69 MOXA Converters TCC 80I TCC 80I Specifications...

Страница 70: ...C Nav Hardware Reference Guide 70 TCC 80I Dimensions Figure 4 3 Moxa TCC 80I Converter Dimensions TCC 82...

Страница 71: ...C Nav Hardware Reference Guide 71 TCC 82 Specifications TCC 82 Dimensions Figure 4 4 TCC 82 Converter Dimensions...

Страница 72: ...C Nav Hardware Reference Guide 72 Times Microwave LMR400 Coaxial Cable LMR400 Specifications...

Страница 73: ...C Nav Hardware Reference Guide 73 Figure 4 5 LMR400 Attenuation vs Frequency Graph LMR400 Connectors Figure 4 6 LMR400 Connectors...

Страница 74: ...C Nav Hardware Reference Guide 74...

Страница 75: ...Coaxial Cable 2 Slide the heat shrink boot over the end of the cable followed by the ferrule Slide the first end of the prep strip tool over the end of the cable and rotate it clockwise Spin the tool...

Страница 76: ...or a file Figure 5 3 Duburring Tool 4 Insert the cable into the opposite end of the prep strip tool and rotate clockwise until the tool spins freely Remove the tool If you are using a knife to comple...

Страница 77: ...it bottoms Trim the solder flush with the back of the pin with a knife Place a shim over the cable and up against the core a razor blade will do Now place the pin over the center conductor and heat t...

Страница 78: ...on with scissors Figure 5 7 Connector Installation 8 Make sure that the connector is bottomed Bring the ferrule all the way up to the back of the connector Check the pin height with a pin gauge Crimp...

Страница 79: ...ax cable terminated in a Snap and Seal F connector which is then joined to a female female adapter or barrel connector Figure 5 9 RG 59U Coaxial Cable 2 The next few photos will show how this barrel c...

Страница 80: ...adapter and was tightened The connector on the right has an O ring and is sealed to the coax internally with silicone grease Figure 5 11 Coax seal Roll 4 Coax Seal is a putty like material in tape fo...

Страница 81: ...h winding The last wrap again comes straight back over the previous wrap without a diagonal The seal is slightly sticky and should be molded now by hand to remove any gaps and to ensure that all the w...

Страница 82: ...uter jackets Product is non conductive non contaminating and non toxic and UV stable APPLICATIONS Provides a long lasting waterproof seal for coaxial cable fittings and many other connections Use for...

Страница 83: ...portant role in navigation meaning that the GNSS signals received must have good dispersion This dispersion reduces errors by providing wide angles for trilateration algorithms to more accurately comp...

Страница 84: ...tions The interference if any is usually localized up to a half mile from the power line While strong magnetic fields have no effect on GNSS signals some computers and other electronic equipment radia...

Страница 85: ...ernal lithium battery has a 10 year life span You can assume the Lithium battery has failed when the receiver no longer retains configuration parameter setting changes Contact C Nav Support for replac...

Страница 86: ...Deg Degree DGPS Differential Global Positioning System DOP Dilution of Precision DTE Data Terminal Equipment ECDIS Electronic Chart Display Information System ECEF Earth Centered Earth Fixed EGNOS Eur...

Страница 87: ...ion LF Low Frequency Long Longitude LORAN Long Range Navigation System LNA Low Noise Amplifier MSAS MTSAT Satellite based Augmentation System MSL Mean Sea Level NAD27 North American Datum 1927 NAD83 N...

Страница 88: ...nternational System of Units SNR Signal to Noise Ratio SPS Standard Positioning Service SSR Spread Spectrum Radio SV Space Vehicle TDOP Time Dilution of Precision UHF Ultra High Frequency USB Universa...

Страница 89: ...rents that are decoded by the receiver Patch or Microstrip antennas are most commonly used in GPS Antenna Phase Center APC is the point in an antenna where the GPS signal from the satellites is receiv...

Страница 90: ...system used in communication where selected strings of 0 s and 1 s are assigned definite meanings Binary Pulse Code Modulation is a two state phase modulation using a string of binary numbers or code...

Страница 91: ...have been assigned These coordinates can then be held fixed and are used in other dependant surveys Control Segment is a worldwide network of GPS monitoring and control stations that ensure the accura...

Страница 92: ...sion by applying these corrections to the satellite data received by the rover Dilution of Precision DOP is a class of measures of the magnitude of error in GPS position fixes due to the orientation o...

Страница 93: ...al error at a given point computed from the propagation of all errors affecting the position solution and expressed by its semi major and semi minor axis vectors of greatest and least magnitude and th...

Страница 94: ...n for the transfer from the C A code to the P code Horizontal Geodetic Network is a network for which the horizontal coordinate latitude and longitude of the control points in the network are determin...

Страница 95: ...and observed sets of data by minimizing the sums of the squares of deviation between observed and expected values LEMO is a type of data or power connector Logging Interval is the frequency at which...

Страница 96: ...formation P code is the extremely long pseudo random code generated by a GPS satellite It is intended for use only by the U S military so it can be encrypted to Y code and then denies unauthorized use...

Страница 97: ...its signals GPS receivers use PRNs to identify and lock onto satellites and to compute their pseudoranges Pseudorange is the apparent distance from the reference station s antenna to a satellite calcu...

Страница 98: ...ons from a SBAS such as C Nav Roving Receiver see rover Satellite Based Augmentation System SBAS this is a more general term which encompasses WAAS C Nav and EGNOS type corrections Satellite Constella...

Страница 99: ...95 4 to 98 2 meaning that if 100 observations are taken between 95 and 98 of those observations will be within the 2dRMS where approximation 2 Universal Time Coordinated UTC a time standard maintained...

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