Processor Userguide v1.2(Eng)

7/31/2019 Processor Userguide v1.2(Eng)

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Introduction

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Introduction

Even if Real-Time positioning techniques have evolved quickly in the last years and have

improved their accuracy in a significant way, the need for a data processing after the survey is

not vanished. On the contrary there are still valid reason for using this strategy and for

choosing a reliable and accurate post-processing software. The typical situations that requires

a post-processing techniques are the following:

In the surveyed point the differential correction are not available or there are gaps inthe signal.

The requested accuracy and reliability is very high and goes beyond actual Real-Time

accuracy.

The immediacy of Real-Time results is not necessary.STONEX GPS Processor is a easy to use software, which allows you to process your static data

collected during your survey and to obtain the maximum accuracy.

It can process single baselines, with a length from hundreds of meters to thousands of

kilometers, or perform complex network adjustment.

It can process different kinds of data: STONEX data format (.STH) and the standard RINEX

format from various GPS receivers.

You can choose the proper processing parameters (data sampling, ambiguity fixing method,

satellite elevation cut-off, etc.) in order to adapt the software to different conditions and

networks (short or long baselines, short or long timespan, etc.).

For gaining the maximum accuracy you can also import IGS precise orbits (.sp3 files).

With this software user can conveniently choose different coordinate systems or self-defines

ellipsoid projection parameters in order to use every national or regional reference system.

The computation time is low, the accuracy and repeatability are comparable with most of

commercial software.

The software has a high level of automation: for example it can automatically process all the

baselines.

The software graphic interface is outstanding, it prints all kinds of graphs including baselines,

network, error ellipse, etc, so that you can immediately verify the outcome of the results.


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Chapter I: Software installation

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Chapter I : Software installationI.1 Hardware and software requirements

Operative System: WINDOWS 98, WINDOWS ME, WINDOWS 2000, WINDOWS XP,WINDOWS VISTA, WINDOWS 7

Hardware environment: CPU exceeding PII MMX 200 MHz, RAM memory exceeding 32MB, HD space exceeding 4 GB, at least 100 MB storage space, Screen: at least 256

colours, 800*600 resolving power.

I.2 Installing steps

Double click on the installation file: the installation procedure starts as follows (fig. 1.1):

Fig. 1.1 Software unpacking

The software unpacks itself automatically. Once finished, it is showed a window of installation

as follows (fig. 1.2):


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Fig. 1.2 First window of installation

Click Next to start the installation. Then it is showed the users agreement (fig. 1.3):

Fig. 1.3 Users agreement

If you agree, click on Yes and the installation continues. Software asks you the installation

path (fig. 1.4):


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Fig. 1.4 Choosing the installation path

Clicking Browse in fig 1.4 you can select the path where you want to install the software,

otherwise the default path C:\Program Files\ Stonex Limited\ Stonex Gps Processor is used.

After the selection, click Next. Then you can see the progress of installation (fig. 1.5).

Fig. 1.5 The progress of installation


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When the software is completely installed, it is showed a window as in fig. 1.6.

Fig. 1.6 The last window of installation

Click Finish to complete the installation. Software creates a shortcut icon of Stonex Gps

Processor on desktop.


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Chapter II: First actions

Chapter II : First actionsClick on STONEX GPS Processor icon, the first screen you see is as in fig. 2.1:

Fig. 2.1 The first screen of installed software

Before starting any calculation it is necessary to register the software. Please input users name

instead of Unregistered and license number: it is composed of 16 alphanumeric characters.

After you have inserted the correct license number a message will inform you that the

registration procedure is finished (see fig. 2.2).


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Fig. 2.2 A message about a correct registration

In the Expiration Data box you can see the expiration date. Click Ok and the main interface

is showed as in fig. 2.3.

Fig. 2.3 Main interface

menu

bar toolsbar

left window

statusbar


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Fig. 2.5 Coordinate system settings

In this window you can set all parameters necessary to correctly define a coordinate system

(ellipsoid parameters, method of projection, geoid model, etc.). Moreover you can modify one

of the default systems. When you have finished click on Return to come back to project

settings window.

In the Central meridian box (see fig. 2.4), you can see what is the central meridian of the

selected coordinate system.

In the Control Net Grade box you can choose among 5 different tolerance levels according to

the length of your loop: if the loop closure error is greater, it will be pointed out. Click on the

Setup box on the right for viewing or modifying the definitions of the levels (fig. 2.6).


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Fig. 2.6 Control level settings

You can modify the default tolerance levels and define others according to your needs.

In the Forbid method box (see fig. 2.4), you can choose if software will automatically forbid

you to use unqualified baselines, which dont satisfy the variance ratio rule (explained in

chapter IV)and whose predicted standard deviationexceeds a fixed limit.

Finally after you have set the project, click OK to come back to the main page.


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Chapter III: Main functions

Chapter III : Main functionsIII.1 Moving through the pages

After the selection of a new project, the main interface appears as in fig. 3.1:

Fig. 3.1 Main interface after starting a new project

You can see in the window on the left a list of pages which can be considered as the

components of the project :

Map of net: It shows the map of the baselines or the network and the ellipses of error. In the

following pictures you can see an example map of a baseline and a network.


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Fig. 3.2 Example map of a baseline

Fig. 3.3 Example map of a network


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Sites: It shows the coordinates of every site of the project. By default WGS-84 ellipsoidal

coordinate are showed (WGS-84 B, WGS-84 L, WGS-84 H), but user can define Cartesian WGS-

84 (WGS84 X, WGS84 Y, WGS84 Z), local projection coordinates in North (known Y), East

(Known X), Ellipsoidal height (altitude) and also orthometric height (Known H)(see as example

fig. 3.4).

Fig. 3.4 Example of site page

Observation data: It shows detailed information of every raw data file, including the path, name

of raw data, name of the site, height of antenna, date, starting and ending time of collecting. In

this page you can delete data file and edit antenna height (see as example fig. 3.5). See chapter

IV for a complete description of antenna height setting.


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Fig. 3.5 Example of observation data page

Clicking on a single raw file, in the left window on main page, you can see a report of the

tracked satellites in that file (see as example fig. 3.6).

Fig. 3.6 Example of tracking satellite report

Vectors: You can get some information about the baseline solution, including baseline name,

observation type, synchronous observation time, variance ratio (explained in chapter IV),

predicted standard deviation, X increment, Y increment, Z increment, length of baseline and


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relative error, that is the ratio between predicted standard deviation and baseline length (see as

example fig. 3.7).

Fig. 3.7 Example of vectors page

Clicking on a single vector in the left window on main page, you can see a more detailed

description of vector after the processing (see as example fig. 3.8), we will describe better the

processing results in chapter IV.

Fig. 3.8 Example of vector process result page


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Loop closure: You can check information about loop closure: kind of loop, quality (if it is

accepted or not), vectors included, observation time, total length (in m), closure errors in

Cartesian coordinate (in mm), total closure error (in mm), relative closure error (in ppm),

maximum accepted error in one coordinate (column Dwx, in mm), maximum accepted error

on the whole length (column Dwc, in mm)(see as example fig. 3.9). If the relative closure error

exceeds the defined tolerance levels, the column quality will show the message Error.

Fig. 3.9 Example of loop closure page

Repeat vectors: You can check the related information about repeated vectors: observation

time, variance ratio, mean predicted standard deviation, differences in Cartesian coordinates,

mean length, relative mean predicted standard deviation (in ppm), maximum accepted error in

one coordinate (column Dwx, in mm), maximum accepted error in the whole length (column

Dwc, in mm)(see as example fig. 3.10).


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Fig. 3.10 Example of repeat vectors page

Result report: You can check the results and relevant accuracy analysis of loop closures, repeat

vectors and network adjustments (see as example fig. 3.11).

Fig. 3.11 Example of result report page


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III.2 Menu bar

In this section the functions of each menu are introduced.

Project menu:

Fig. 3.12 File menu

New: you can create a new project.

Open: you can open a saved project.

Save: you can save the current project.

Save As: you can save the current project to another path.

Min Size Save: you cansave the current project with the minimum size.

Close: you can close the current project.

Project setting: you can change the parameters of the project.

Print: you can print the current page.

Print preview: you can show how the current page would be printed.

Print Setup: you can set the printer.

Recent file: at the first start it is disabled, after you have saved a project, you can see the

projects recently saved and open them.

Exit: you can exit the program.

Input menu:


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Fig. 3.13 Input menu

Add GPS observed data file: You can add new observed data to the current project. STONEX

format *.STH file and standard RINEX 2.0 file (*.**O) can be selected from different paths. Also

IGS precise orbit file (*.sp3) can be selected (see as example fig. 3.14).

Fig. 3.14 Adding new observed data

Input baseline data: You can input baseline data (.SthBaseLine format)from other previouscomputations and use them in this project (see as example fig. 3.15).


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Fig. 3.15 Input baseline data window

Input station coordinates: you can input the coordinate of reference stations (see as example fig.

3.16).

Fig. 3.16 Inserting known coordinates

Clicking under the column habitus (fig. 3.17) you can modify the kind of coordinates to insert:

tridimensional (N,E,H), plane (N,E), only orthometric altitude (H), nullity means that

software will not take into account the inserted coordinates, delete erases the inserted

coordinates.


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Fig, 3.17 Select the status of control points

Track menu: not used.

Process menu:

Fig. 3.18 Process menu

Setup processing parameters: Before processing, you can set the conditions of calculation. Click

this bar, it is showed a window like fig 3.19.


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Fig. 3.19 Vector process setting

For the meaning of each item please read chapter IV.

Process All: you canstart the automatic processing of all baselines.

Process New: you can start the automatic processing of all new baselines.

Process Selection: you can start the processing of the baselines selected on the network map.

Process unqualified: you can start the process of all baselines which does not satisfy the

variance ratio rule (explained in chapter IV)and whose predicted standard deviationexceed a

fixed limit.

Process cancel: you can stop a processing in progress.

Forbid the selected: you can forbid the use of the selected baselines.

Allow to use the selected: you can allow the use of the selected baselines.

Delete baseline: you can delete a baseline from the project.

Create baseline: you can create one or more baselines from raw data. The window for selecting

the baselines is like fig. 3.20.


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Fig. 3.20 Choosing the baselines to be created

Adjust menu:

Fig. 3.21 Adjust menu

Setup Adjustment Parameters: you can set the parameters for the adjusting. For more details

about this please read chapter IV.

Auto selectthe software will automatically select the eligible baselines, which are those which

satisfy the variance ratio and standard deviation rules.

Repeated vectors: the software will search the difference of the repeated vectors. You can see

the difference opening the Repeat Vectors page.

Closure (all loops): you can calculate the closure error of all closure loops in the net.


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Closure (used loops): you cancalculate the closure error of the closure loops whose baselines are

allowed and qualified in calculation.

Closure (manual): you can select baselines that you need calculating in the net, then calculate

the closure error.

WGS Adjustment: you can start a three-dimension coordinates adjustment into WGS-84

reference system.

2D restricted adjustment: you can start bidimensional plane coordinates adjustment into local

reference system.

Altitude fitting: Given the orthometric height of a reference point, software is able to estimate

the height anomaly, that is the difference between Geoid and WGS84 ellipsoid, and apply thisvalue to all site of the network in order to calculate their orthometric heights.

Network Adjustment: you can start a complete three-dimensional network adjustment (into

both WGS-84 and local system).

Report menu:

Fig. 3.22 Report menu

Vectors Report: The result of baselines calculation can be exported in the format of text in order

to use another adjustment software to calculate the final result. It is showed a window as in fig.

3.23.


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Fig. 3.23 Choosing the text format of baselines results

You can select four different text format according to the adjustment software you choose to

use.

Rinex output: you can transform STONEX static data to standard RINEX format in order to use

them in every calculation.

Result report print setting: you can set the parameters for printing a report of the results (see

as example fig. 3.24).

Fig. 3.24 Report output settings

Result report print preview: you can preview the report before printing.

Result report print: you can print the report of the results.


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Result report output (*.txt): you can export the report of the results into a .txt format.

Track Report: not used.

Report of adjustment: you can export the adjustment results in different formats suited for

different needs. You can select text format like .TXT or .CASS, a delimited text file readable also

by Excel (.COT), a Word format, a Google Earth format (.KML) and .DXF, a file readable by

AutoCAD and other CAD software (see as example fig. 3.25).

Fig. 3.25 Choosing the format of adjustment report

Utilities (T):

Fig. 3.26 Utilities menu

Amalgamate Project: you can combine different project files.

Satellite almanac: this command open a small independent program included into STONEX


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GPS Processor and called Star Report. It has the function of showing the satellite

configuration depending on time and position selected by the user. chapter V is dedicated to its

description.

Settings:

Fig. 3.27 Settings menu

Track Solve Settings: not used.

Track Report Settings: not used.

Setup Process Parameters: Before processing, you can set the conditions of calculation. For

more details about this, please read chapter IV.

Setup Adjustment Parameters: you can set the parameters for the adjusting. For more details

about this, please read chapter IV.

Result Print Setting: you can set the parameters for printing a report of the results.

Result Browse Setting: you can disable the results of different adjustments or loop closure from

Result Report page.

Setup Control Net Grade: you can modify the tolerance levels.

Setup Coordinate System: you can modify an existing or create a new coordinate system.

View menu:

Fig. 3.28 View menu


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From this menu you can activate o deactivate the tool bar and the status bar.

Help menu:

Fig. 3.29 Help menu

Help topics: you can see this user guide.

About: you can see some information about the software version (see as example fig. 3.30).

Fig. 3.30 Version number of the software

Register: This command allows you to register the software as just explained in chapter II.

III.3 Tool bar

The tool bar is composed of many icons (see fig. 3.31):

Fig. 3.31 The tool bar


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Some of them have the same function of some menu commands, other icons are commands

which modify the map layout. A description of every icon moving from left to the right follows:

: You can open a new project.

: You can close the open project.

: You can open an existing project.

: You can save a project.

: You can add GPS observation data.

: You can start to process all vectors.

: You can start to process new vectors.

: You can start to process ineligible vectors.

: You can start to process selected vectors.

: not used.

: You can stop processing in progress.

: You can open Input known stations coordinates window.

: You can see some information about the software version.

: You can select a vector on the map.

: You can move the map.

: You can zoom in the map.

: You can zoom out the map.

: You can zoom out the map in order to view all features.

: You can measure on the map the approximate distance between two points.

: You can visualize on the map the ellipse of error.

: You can start the network adjustment.


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: You can automatically select the eligible vectors.

: You can start the three-dimension adjustment.

: You can start the two-dimension adjustment.

: You can start the altitude fitting.

: You can start the printing procedure of the results.

: You can calculate the difference of the repeated vectors.

:You can calculate the loop closure of all vectors.

: You can calculate the loop closure of allowed vectors.

: You can calculate the loop closure of manually selected vectors.

III.4 The map

An interesting function of the map is the ellipse of error (see as example fig. 3.32).


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Fig. 3.32 The ellipse of error

It is a graphic representation of the predicted error on adjusted coordinates. The axes of ellipse

are the errors along North and East directions, while the blue line superimposed on ellipse is

the error in altitude. In this way user have predicted errors both in Cartesian coordinates (in

the result output) and in ellipsoidal coordinates (on the map). In the bottom of fig. 3.32 you

can see the scale bar: the upper number is the scale of errors while the lower number is the

scale for vectors lengths. Clicking on the map with mouse right button you can increase or

decrease the dimensions of error ellipse using the commands Zoom in ellipse or Zoom outellipse (see fig. 3.33).


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Fig. 3.33 Modifying the ellipse dimensions


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Chapter IV: The processing

Chapter IV : The processingThis chapter is dedicated to a detailed explanation of all processing settings. As we have said

also in the introduction if you need some theoretical explanations on processing techniques we

recommend to read general GPS handbooks.

IV.1 Raw data editing

Before starting to process, there are two important matters to be discussed. The first is the

problem of correctly set the antenna height. After you have loaded an observation .STH file

from a survey, in the Observation Data page, you can see that the column Ant High and

Mea. Ant High are set to 0 by default (see fig. 4.1).

Fig. 4.1 Detail of Observation Data page

You have to write into Mea. Ant High column the height measured during the survey and

select in Ant Mode the correct method of measure. There are five possible method: Bottom of

antenna phase, Line of Edge of antenna, Bottom of antenna mount, Line of edge of Toll

and Bottom of antenna. All methods cannot be applied to every receiver, each one usually

allows two or three methods according to its shape. For example STONEX S9 GNSS or the

previous model STONEXS82+ allow to take the measure of Line of Edge of antenna, Bottom

of antenna mount or Bottom of antenna. You can find a description of the methods on the

receiver user guide. Once you have chosen the correct method, software will automatically

calculate the Ant High, that is the real vertical antenna phase center height. Please note that a

selection of a wrong measuring method could introduce a bias of several cm in your results.

If you import RINEX file, the antenna height is just defined in the header of the file.

The second matter deals with the opportunity to edit the raw data. In the Observation Data

page double click on an item: a window as in fig. 4.2 is opened.


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Fig. 4.2 Data Edit window

Every red line corresponds to one satellite signals. The break of red lines means signal

interruption. You can delete these epochs with one or more signal interruptions using the tool

, while using you can resume the deleted epoch. After you have completed the editing,

exit the data editing box. This editing could improve your processing results.

IV.2 Baseline processing settings

When you have loaded raw data from two or more stations and they have synchronized

timespan, Processor should automatically create the corresponding vectors. On the maps you

can see the created vectors colored in green (if there are more than one vectors referring to

the same baseline the vector on map is thicker). You can manually select a baseline: it becomes

black. Clicking with the right button of mouse the setting window is opened (see fig. 4.3).


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Fig. 4.3 Baseline settings window

On the top and on the left there are four small white boxes, if checked, they have the following

meanings: Forbidden means the current baseline is forbidden by user, New means the current

baseline has not yet been processed, Auto Forbid use means software has automatically

forbidden this vector, Selected baseline means the current baseline has just been selected on

the maps.

Going down you can find:Mask angle: it is the minimum satellite elevation considered for the calculation. We usually set

it at 10 degrees. Users can adjust it according to their specific needs. We usually increase mask

angle when there are enough satellites, so using only the best altitude satellites for calculation.

When the satellites are few, please decrease altitude mask angle.

Epoch Interval: it is the sampling interval for the calculation. The number on the left box is

calculation epoch and in the right box is collection epoch. When calculation interval is lower


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than collection interval (for example 1 sec. instead of 15 sec.) , the software will use collection

interval. Otherwise, it will use calculation interval. You can set it by yourself, taking into account

that a lower sampling interval guarantees a more accurate processing. When there are many

cycle slips, you should increase the sampling interval.

Gross error: This value is a limit for the blunder detection. The default value is 3.5 (m).

Reference satellite: It allows expert user to selectthe reference satellite, which is the satellite

used for building the double-differences.

Minimum Epoch: you can set the minimum number of epoch. If number of epoch is smaller,

the baseline will not be processed.

Maximum Epoch: you can set the maximum number of epoch. If number of epoch is greater,the baseline will not be processed.

Select Eligible Solution: you can select fixed solution, float solution or triple solution. In

the fixed solution the ambiguities are fixed to the most probable integer value, in the float

solution real value of ambiguities is used, while in the triple solution the triple differences are

used in the processing.

If you choose fixed solution, you can also select the variance ratio and the maximum standard

deviation accepted (error predicted after processing). The variance ratio is the ratio betweenthe solution with the lowest variance and the next higher variance solutions: greater is its

value, greater is the probability to fix the correct ambiguities.

WGS84-XYZ: you can see the values of the baselines in XYZ coordinates and the 3D distance

for any method of solution. You can also see the corrections of any solution with respect to the

approximate baseline.

Adjust-XYZ: you can see again the values of baseline in XYZ coordinate, but after the

adjustment.Observation method: You can select theobservation or the combination of observation to be

used in the processing. If you are not expert please select Auto select and software will choose

the proper solution.

Ambiguity resolution: You can select the method for ambiguity resolution, you can choose

LAMBDA or Searching method.

In the usual computation, that means a baseline of tens of km and an observation time of few


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hours, the calculation time is about few minutes. After calculation, the eligible baseline will

turn red and the ineligible one turns grey. If the calculation stops after few seconds of

processing, probably the reason is that software cannot read the information about orbit: so

you have to load an orbit or navigation file.

You can see in Vectors page the predicted absolute (in meters) and relative error of your

processing. As already described you can view a more detailed page about the processing

results. In this report many information are summarized: Cartesian and ellipsoidal coordinates

of the two sites composing the base, name of files containing raw data, the two antenna heights,

the predicted standard deviations (in Cartesian coordinates), the correlation matrix. Then some

graphs are showed: first the report of satellite signals (the same showed clicking on the rawdata item, see fig. 3.6) for each station, then the report of satellites observed simultaneous to

reference satellite(see fig. 4.4), finally the residuals of the phase of each satellites (see fig. 4.5).

Fig. 4.4 Tracking satellites simultaneous to reference satellite plot


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Fig. 4.5 Residuals plot

IV.3 Network adjustment settings

After baselines calculation, user has to insert the coordinates of the reference stations of the

network, then he can make the adjustment in order to have the position of the surveyed point

in the suited reference system.

Clicking on Setup Adjustment Parameters there is the opportunity to modify someparameters (see as example fig. 4.6).

Fig. 4.6 Setup adjustment parameters window

TVerification enable a T-Student statistical test with three-dimensional adjustment. Check

Known Points with Coordinate System enable a control: if the coordinate inserted by user are

not coherent with the coordinates found in observation file, software does not take them into


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account. The maximum difference accepted is about 1 km. Select Altitude Fitting Method box

allows user to define the kind of altitude fitting: by translation, with a plane or with a surface,

and the known points necessary in each fitting. Usually the fitting by translation is used when

you have only one known point, while the others are used when there are some points for a

more precise fitting.

Then the network adjustment proceeds in two possible ways: manually or automatically. In the

first case if you want the result in WGS-84 system its enough to select WGS adjustment,

otherwise if the reference coordinates are framed into a local coordinate system, after WGS

adjustment, you have to select 2D restricted adjustment for the plane adjustment and then

altitude fitting for getting the orthometric heights. Otherwise in case of an automatic networkadjustment, you have to select Network adjustment and software will make the suited

adjustment using the available reference coordinates.


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Chapter V : Star Report

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Chapter V :

Star Report

This special function of Processor opens a small separate software, which can be very useful to

the surveyors. It gives to users the opportunity to see the satellite positions and configuration

above a specific site at a chosen time. This allows the surveyor two possibilities: to better

schedule a survey in the near future, avoiding bad satellite configurations, and to select the

suited data to be processed.

V.1 Satellite maps

When you click on Satellite Almanac function, it is showed a window as in fig. 5.1:

Fig. 5.1 Main interface of Star Report

For the users there are many different maps or graphs to consult. In fig. 5.1 you can already

observe two interesting graphs (enlarged in fig. 5.2). The graph on the top of the page shows


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the number of satellites which the receiver will observe or has observed in good visibility

conditions, depending on the time. The less favorable conditions are showed with a different

colour.

Fig. 5.2 Satellite number and PDOP graph

In the lower graph user can observe the position dilution of precision (PDOP) values depending

on time. The PDOP parameter is one of most used indexes of good quality of satellite

configuration: a PDOP lower than 2 points out a very good configuration while a PDOP above

4 or 5 means a bad configuration. Combining the outputs of these two graph, it is possible to

determine the best time for a survey.

If user needs more precise information about single satellites, he can click on the icon above

Satellite Orbit Map (placed on the left menu). A new map is opened as in fig. 5.3.


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Fig. 5.3 Satellite orbit map

In this map it is possible to see the path of every satellites on the Earth surface and its position

at chosen time.

If user click on the icon above Satellite Distribution Map, a window as in fig. 5.4 is opened.

Fig. 5.4 Satellite distribution map


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This map shows the satellite path and position from the point of view of the receiver and

allows user to observe the elevation and azimuth of every satellites. In case of an obstacle

which affects the sky visibility, user can also verify, using this map, how this obstacle

compromises the survey.

If user click on the icon above Satellite Map, a new window as in fig. 5.5 is opened.

Fig. 5.5 Satellite map

In this map user can see the time intervals in which each satellite is visible.

Finally if user click on the icon above Text output, he can see the elevation of satellites and

PDOP values summarized in a text format (see as example fig. 5.6).


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Fig. 5.6 Text output page

V.2 Site and time settings

In this section it is explained how to set all parameters of Star Report. If you click on the icon

above Parameter Setup a window as in fig. 5.7 is opened:

Fig. 5.7 Parameter Setup window


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This window is composed of four sub-windows. The default sub-window is Ephemeris Doc

and allows to define the interval of time considered for creating the maps and graphs.

Moreover you can update the ephemeris file: this is a text file containing the orbital parameters

of all GPS satellites. The satellite configurations showed in this software are based on the

ephemeris file. It is necessary sometimes to update this file in order to have a more precise

maps. We recommend to use the ephemeris file from website:

http://celestrak.com/GPS/almanac/Yuma/,you can find there a week update.

Clicking on Coordinate Time Zone you can enter into another sub-window (see fig. 5.8).

Fig. 5.8 Coordinate Time Zone sub-window

From this sub-window you can define the reference coordinates for the maps: the positioning

has a precision of one thousandth of second, that is about 30 cm. It is not possible to define the

altitude, so every point is considered at the sea level.

In Instrument Setup sub-window you can define the minimum satellite elevation below which

a satellite is not considered in the maps, the sampling time interval of the maps and the

number of channels, that is the maximum number of satellites collected by receiver (see fig.

5.9).
http://celestrak.com/GPS/almanac/Yuma/http://celestrak.com/GPS/almanac/Yuma/http://celestrak.com/GPS/almanac/Yuma/


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Fig. 5.9 Instrument Setup sub-window

In the Collection Condition sub-window (see fig. 5.10) user can define the minimum number

of satellites and the minimum PDOP which define a limit condition which split up the

considered timespan into a good and a bad situation. This limit is showed into the PDOP graph

by a line and with different colours in the graph of the number of satellites as observed in fig.

5.2.

Fig. 5.10 Collection Condition sub-window


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In the mainframe of Star Report on the right there is a window called Observing Session

Status (see fig. 5.11). In this window it is possible to select an hour using the scroll bar and

select a day using the commands Last, Today, Next and Custom.

Fig. 5.11 Observing Session Status window

Finally you can print every map you want clicking on the print menu in the menu bar.


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Documents

Processor Userguide v1.2(Eng)