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
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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
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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.

Introduction
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1-3
1-3 ABOUT THIS MANUAL
The present manual includes two major chapters :
- Chapter 2 takes you to the standard navigation display in
just one step : pressing the ON/OFF key. The standard
navigation display provides basic navigation data (position,
course, speed, quality figure) which are continually visible on
the screen (even when other navigation functions are being
used).
- Chapter 3 teaches you how to use the available navigation
functions (HOMING, ROUTES) and auxiliary functions.
These two chapters are summarized in the User's Quick Guide
accompanying this manual.
Appendices provide general support information in connection
with the use of your receiver :
-Installation,
-Connection to a peripheral,
-The Differential technique,
-Datum's,
-receiver specifications, etc.
Conventions used in this manual
The following symbols are used to represent the arrow keys :
[↵]for
[→]for
[←]for
[↓]for
[↑]for

Introduction
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1-4
1-4 HOW TO USE THE KEYBOARD
NAV
DIF
AUX
321
WPT
54
78
On/Off key
Arrow keys
Numeric
keypad Saves or gives access to
data that can be updated via
the keyboard
AUX
WPT
NAV Pressing a function key causes a specific menu to show up in
the lower part of the screen.
6
910
MRK
Function keys
MARK pushbutton
WHEN THE CURSOR RESTS :
KEYS on a menu at the
bottom of the
screen
on a character or option that you
are allowed to update ("[↵
↵↵
↵] Valid"
is prompted)
Move the cursor
horizontally within
the menu
Move the cursor to the next
characters or options that you are
allowed to update
Scroll through the
display pages
Scroll through the possible values for
a character or option. Possible values
for an alphanumeric character are :
- figures from 0 to 9
- upper-case letters A to Z
- characters + - .*/ : and "space".
8
123
Y Z −
V W
Y
S T U
J K L M N O P Q R
G H ID E FA B C
790
654
Direct choice within
a menu.
The [0] key may act
as an EXIT key,
taking you back to
the previous menu
or step
Entry of a permitted numeral if the
cursor rests on a character entry field.
Entry of a letter (1 of 3) within an
alphanumeric field.

Introduction
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1-5
How to select a menu
In the procedures described throughout this manual, you will
be required to press a function key ([NAV] or [AUX] or [WPT])
and to select a menu.
- For example, if you are required to :
Press [AUX] and select "5-Init" then "2-Position".
You only need to press [AUX] then [5] then [2].
The direct method above allows you to rapidly access any
menu (or submenu).
- The cursor may be prepositioned on the field you are most
likely to wish to change. In that case you only need to press
[↵] to select the highlighted choice number, or press the
desired key to select another choice number (you may also
use [→] or [←] to move the cursor to the desired choice
number then press [↵]).
Depending on the context, the two equivalent procedures :
- take you to a submenu or a display
- or cause the immediate performance of an action
- or take you to fields and/or options that you are allowed to
update.

Introduction
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After selecting a menu or submenu
Example :After pressing [AUX] then [5] then [2], you should get
the following screen :
AUX INIT POSITION
Lat Lon
47°16N 1°29W
Ýß = SCANNING <>=PREV/NEXT FIELD ↵=VALID
U T
S
R
Q
QCurrent menu selection steps
RCurrent values in memory
SThe bottom row on the screen will be used for any of the
following purposes :
- simply displaying information
- or displaying a menu (with a cursor)
- or displaying the highlighted prompt "↵Update"
meaning that you only need to press [↵] to access entry
fields that will allow you to make changes to some data.
- or displaying the highlighted prompt "↵Valid" meaning
that you are allowed to update some parameters and/or
options. The cursor automatically shows up on the first
character or entry field you are allowed to update : use
the [→] or [←] arrow key to move the cursor to the
desired character or entry field, and make the necessary
changes, then press [↵] to save the new values or
options.

Introduction
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1-7
TWhenever the data to be displayed are in the form of a list
(with two or more pages) you may scroll through the list,
using [↓] and [↑].
UFor each entry field, you can enter only authorized
characters. The value typed on the keyboard is tested as
you press [↵]. If it is inconsistent, then the cursor keeps
blinking on the first suspect character until you type an
authorized value or you leave the entry field by pressing
any function key. (An error message appears, self-
explanatory in some cases, which disappears as you next
press any key).
NOTE : In an alphanumeric field, you may use the numeric
keys rather than [↑] or [↓]to enter the desired
letters.
Example, pressing :
[1] will enter "1"
[1] [1] will enter "A"
[1] [1] [1] will enter "B"
[1] [1] [1] [1] will enter "C"
[1] [1] [1] [1] [1] will enter "1" and so on ...
NOTICE
Whenever you wish to terminate the step in progress, simply
press any function key.
Pressing the [0] key allows you to quit some dialog screens
(unless a numeric entry field is selected). This takes you back
to the screen that initiated the dialog.
Pressing the [0] key also allows you to move up one step in
any menu.

Introduction
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1-8

Standard Navigation
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2-1
2 - STANDARD NAVIGATION
•Your receiver is very easy to use : simply press the ON/OFF
key...
...and that's all ! All the parameters required at power-up
(position last computed, selection of a Differential GPS
station, etc.) were saved to the non-volatile memory when
the receiver was last turned off.
In most cases, you will not need to care about those
parameters when you turn it back on.
Furthermore, the date and time, continually updated during
power outages, are available straight away at power-up.
2-1 THE STANDARD NAVIGATION DISPLAY
•To turn on the receiver, briefly press the ON/OFF key (top
left key in the keypad).
The receiver automatically runs its power-on self-test and
retrieves the parameter settings saved when it was last turned
off.
Data mem. COMPLETED
Main Osc. COMPLETED
Math Copr.COMPLETED
Asic GP1 COMPLETED
Asic GP2 COMPLETED
Asic GP3 COMPLETED
PWES1
VX X
PWES1 IDxx
Addr bus COMPLETED
Data bus COMPLETED
Flash test COMPLETED
DIF03x
VX.X
DIF03 IDxx
Addr bus COMPLETED
Data bus COMPLETED
Flash test COMPLETED
GPS03
VX X
GPS03 IDxx
DSNP

Standard Navigation
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2-2
When self-test is complete, the receiver automatically selects
the standard navigation display (providing the data helpful to
most navigators most of the time).
At power-up, the standard display shows the latest position
computed when the receiver was last turned off, as in the
example below.
Aug 13 1996 AUTO .GPS.
UTC 10:27:05 3D 08/10SVs
NAV
WGS84
Q-1
÷ = SCANNING
1-FREEZE 2-MODE 3-GRAPHIC
W
V
U
S
R
Q
T
QAbridged status area (see details below)
RTells you which function is selected
STells you which Datum or geodetic system is currently
used
TFix Quality figure (0 to 9 for DGPS ; 10 to 19 for
KART)
UAppears if two or more screenfuls are available
VMenu area (depends on the function selected)
WLarge-size navigation display area (see details below).

Standard Navigation
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2-3
&
&&
&Large-size navigation display area
Depending on the geodetic system selected (AUX→5→4),
either Latitude/Longitude or Northing/Easting coordinates
may be displayed.
ELatitude/Longitude
Depending on the units selected (AUX→5→6), either a
degrees, minutes or degrees, minutes, seconds format
may be used to display the Latitude and Longitude.
47°16.08573 N
1°29.49842 W
***°H7.45m
0.2kT^ 1.3kT
Course Over
Ground
(see note 1)
Altitude
Longitude (d,m)
Latitude (d,m)
Vertical speed (the
arrow denotes the
direction)
Horizontal
speed
(see note 2)
Course Over
Ground
(see note 1)
Altitude
Longitude (d,m,s)
Latitude (d,m,s)
47°16'08.734 N
1°29'49.426 W
123° H 7.45 m
0.2kT^ 1.3kT
ENorthing/Easting
Vertical speed (the
arrow denotes the
direction)
Horizontal
speed
(see note 2)
Course Over
Ground
(see note 1)
Altitude
Easting
Northing
N 12345.12
E- 123456.12
***° H 7.45m
0.2kT^ 1.3kT

Standard Navigation
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2-4
NOTE 1 : *** is displayed if the COG is inconsistent (if the
speed is zero or near zero).
NOTE 2 : Depending on the unit selected (AUX →5 →6) the
speed may be expressed in :
knots (kT)
metres/second (m/s)
kilometres/hour (k/h)
NOTE 3 : Selecting FREEZE prevents the display from being
refreshed for about 10 seconds.
The navigation display data are continually visible, either
occupying the large-size navigation display area or shrunk in
the upper part (under the abridged status area).
Aug 12 1996 AUTO .DGPS1.
UTC 07:02:15 3D 08/09SVs
WGS84 47°16.08951 N ***° H 48.1m
Q.9 1°29.48802 E 0.2kT ^ 1.9kT
Aug 12 1996 AUTO .DGPS1.
UTC 07:02:15 3D 08/09SVs
WGS84 N 12345.12 ***° H 48.1m
Q.9 E- 123456.12 0.2÷ ^ 1.9÷
Shrunk navigation display data (whenever a function
other than the standard navigation display is used).