DSNP NR203 User manual

Documentation Part No. 0311352 Issue : February 2000
NR203
Multi-Differential
GPS Receiver
User's Manual
Software version : V4.1

In no event shall DSNP be liable for incidental or consequential damages or related expenses
resulting from the use of this product, or arising out of or related to this manual or the
information contained in it, even if DSNP has been advised, or knew or should have known of
the possibility of such damages.
The information in this manual is believed to be accurate and reliable. However, DSNP
reserves the right to make changes to its products or specifications at any time, without notice,
in order to improve design or performance and to supply the best possible product.

CONTENTS
Page
1 - INTRODUCTION .......................................................................................... 1-1
1-1 About the NR203 receiver .......................................................................... 1-1
1-2 About DSNP's Differential GPS .................................................................. 1-2
1-3 About this Manual ....................................................................................... 1-3
1-4 How to use the keyboard............................................................................ 1-4
2 - STANDARD NAVIGATION ........................................................................... 2-1
2-1 The standard navigation display ................................................................. 2-1
2-2 How to enter an initial estimate .................................................................. 2-7
2-3 How to turn off the receiver ........................................................................ 2-8
3 - HOW TO USE ALL ADVANCED FUNCTIONS ............................................ 3-1
3-1 The Differential mode ................................................................................. 3-2
3-1-1 Introduction........................................................................................ 3-2
3-1-2 Viewing the status of DGPS stations ................................................. 3-4
3-1-3 Selecting differential stations ............................................................. 3-6
3-1-4 Kart processing.................................................................................. 3-12
3-1-5 DGPS processing .............................................................................. 3-15
3-1-6 Viewing/updating the Station library................................................... 3-16
3-1-7 Checking that the selected stations are properly received ................ 3-21
3-1-8 Displaying DGPS message ............................................................... 3-21
3-2 Waypoints and tracks ................................................................................. 3-22
3-2-1 Definitions ........................................................................................... 3-23
3-2-2 How to read the list of waypoints stored in your receiver .................... 3-24
3-2-3 How to create a waypoint from an existing waypoint .......................... 3-26
3-2-4 How to create a waypoint from the "NAV" screen ............................... 3-27
3-2-5 How to update a waypoint................................................................... 3-28
3-2-6 How to delete a waypoint .................................................................... 3-28
3-2-7 How to view existing tracks ................................................................. 3-29
3-2-8 How to define a new track................................................................... 3-29
3-2-9 How to delete a track .......................................................................... 3-30

3-3 Navigation modes....................................................................................... 3-31
3-3-1 Definitions ........................................................................................... 3-31
3-3-2 Graphic screen.................................................................................... 3-33
3-3-3 How to use the position mode............................................................. 3-34
3-3-4 How to use the homing mode ............................................................. 3-35
3-3-5 How to use the bearing mode ............................................................. 3-36
3-3-6 How to use the profile mode ............................................................... 3-38
3-4 Intentionally blank....................................................................................... 3-39
3-5 Auxiliary functions....................................................................................... 3-40
3-5-1 Status................................................................................................. 3-41
3-5-2 Viewing and clearing events and anomalies...................................... 3-45
3-5-3 Viewing the UKOOA QC data ............................................................ 3-46
3-5-4 Viewing the software version ............................................................. 3-48
3-5-5 Initialization........................................................................................ 3-48
3-5-6 Unavailable........................................................................................ 3-54
3-5-7 Screen brightness.............................................................................. 3-54
3-5-8 GPS fix mode .................................................................................... 3-55

APPENDIX 1 : Installation ................................................................................. A1-1
APPENDIX 2 : Getting started ........................................................................... A2-1
APPENDIX 3 : Connecting a peripheral ............................................................ A3-1
APPENDIX 4 : Differential GPS......................................................................... A4-1
APPENDIX 5 : DATUM ...................................................................................... A5-1
APPENDIX 6 : Allowable commands from a PC................................................ A6-1
APPENDIX 7 : Raw Data................................................................................... A7-1
APPENDIX 8 : Variables accessible using the CONFGPS software in output
messages and user-defined screens A8-1
APPENDIX 9 : NR203 Specifications ............................................................... A9-1
APPENDIX 10 : List of possible anomalies ...................................................... A10-1

WARNING
The accuracy of this receiver is not only dependent on its
performance but also on various external factors (installation
and environmental conditions, handling, use, etc.).
Therefore, it should be used as an aid to navigation rather than
a substitute for a navigator's skill and judgement.
The NR203 is a reliable shipmate that will help you to make
vital decisions in critical situations, but don't let them allow
yourself to believe this relieves you of customary prudence and
navigational care.
NOTICE
DSNP DGPS receivers can use the correction signals
broadcast by the long-range DGPS stations installed by DSNP
on the French territory.
So long as no broadcasts by radio-positioning systems are
taxed in this country, DSNP can offer its customers free
access to the corrections provided by those stations.
However if French regulations changed in the future, to
impose taxation on radiopositioning transmissions, DSNP
would reserve the right to pass on the resulting financial
expenses to the users working with those stations.

Introduction
0311357 Issue : September 1997
1-1
1 - INTRODUCTION
1-1 ABOUT THE NR203 RECEIVER
Multidifferential
All-in-view real-time survey receiver, the NR203 integrates a
powerful multi-frequency, multi-station correction receiver
capable of processing differential messages from a variety of
sources :
•DSNP NDS200 HF Station
•DSNP NDS100 UHF Station
•IALA Radiobeacon
•Any RTCM 104 compatible DGPS system
The corrections are subsequently used to compute either
KART and EDGPS positions (when phase data are available)
or up to 4 single station solutions (when only PRCs available)
then mixed in an optimized multistation DGPS solution. Thus,
in any case the NR203 gives the user the best possible
position with the highest degree of reliability.
The most advanced and powerful real-time survey receiver
available.
The NR203 is based on DSNP latest high-performance 15-
channel GPS core and is fully compatible with industry
standards (RTCM, UKOOA, etc.). It makes use of
sophisticated statistical testing and quality control procedures
to guarantee the reliability of results. Furthermore, it delivers
high-rate raw GPS data and includes advanced facilities
including a 1 pps output, and 3 event trigger inputs. A fully
programmable serial interface able to accommodate virtually
all industry standard protocols as well as non-standard user-
specific requirements is also included to guarantee a smooth
integration into the user's working environment.

Introduction
0311357 Issue : September 1997
1-2
1-2 ABOUT DSNP'S DIFFERENTIAL GPS
DSNP's Differential GPS provides :
- Centimetric to metric accuracy according to the processing
mode,
- Optimal correction messages for high-accuracy navigation,
- A coherent line of transmitters and receivers,
- Numerous Differential transmitting stations worldwide.
The absolute positioning accuracy as well as the excellent
repeatability of the system are continually afforded whether the
SA (Selective Availability under the control of the US
Department of Defense) is activated or not.
One should remember that in the presence of SA, most non-
Differential GPS receivers provide poor results (position
accuracy no better than 100 to 500 metres, speed accuracy
from 1 to 2 knots), which makes those receivers inefficient in
most applications on continental shelves.
Naturally, differential corrections are not available
everywhere on the Earth's surface. However, with its 15
true parallel channels capable of processing the complete
set of GPS data, your receiver, in Straight GPS mode,
keeps up with the best competitors on the market.