Download - Tutorial 3. Processing GNSS Baselines
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Processing GNSS Baselines
ContentsAbout this tutorial ................................................................................................... 3Step 1. Open the project ........................................................................................ 3Step 2. Verify baseline processing settings ........................................................... 4Step 3. Process baselines ..................................................................................... 6Step 4. Edit a session and reprocess a baseline ................................................... 7Step 5. Identify and disable dependant baselines ............................................... !
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A%o&t tis t&torialIn this tutorial- you 9ill process baselines fro$ ;%22 data that has already beeni$ported into the project.
Notes:
"or this tutorial- you 9ill be processing baselines for data that includes both ' and
' signals. >ou can perfor$ the procedures described in the tutorial 9hile runningTri"%le B&siness Center soft9are 9ith the Survey Standard product license?ho9e&er- only the ' data 9ill be processed. #he Survey Advanced product licenseis re@uired to process baselines for ' and ' data. #o &erify the product license foryour installation- select 'elp ( A%o&t Tri"%le B&siness Center and clic= thePro!&cts button.
If you need additional help at any ti$e you are using the soft9are- press )* to displaythe online help.
Step 1. Open te pro+ect"or this tutorial- you 9ill use the project file Tutorial 3.vce. ;%22 data has already beeni$ported into the project- but baselines ha&e not yet been processed.
. On the Tri"%le B&siness Center $enu bar- select )ile ( Open Pro+ect. Or- clic=
the Open Pro+ect icon on the toolbar.
#he Open )ile dialog displays.
. ro9se to C:\Trimble Tutorials\TBC\Projects\Tutorial 3.vce and clic= Open.
If you installed the tutorial to a location other than the default location sho9n here-
bro9se to that location.
#he project opens in the Tri"%le B&siness Center 9indo9.
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Note: #his figure sho9s the Plan -ie. tab 9ith a 9hite bac=ground. >ourbac=ground $ay be blac=. If you 9ant to change it to 9hite- select Tools ( Optionsand select Bac#gro&n! color/ 0ite in the Options dialog.
ecause the project file Tutorial 3.vce is read/only- you $ust sa&e it 9ith a differentna$e.
3. 2elect )ile ( Sa1e Pro+ect As.
4. In the Sa1e As dialog- na&igate to ..\My ocume!ts\Trimble Busi!ess Ce!ter. #henenter Tutorial 3 "our#ame.vce in the )ile na"e field and clic= Sa1e.
efore you process baselines for the project- you should chec= the baselineprocessing settings to ensure they are appropriate for your project.
Step 2. -erify %aseline processing settings
. 2elect Pro+ect ( Pro+ect Settings. Or- clic= the Pro+ect Settings icon on thetoolbar.
#he Pro+ect Settings dialog displays.
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. In the na&igation left pane in the Pro+ect Settings dialog- select BaselineProcessing.
>ou can no9 select any of the Baseline Processing categories to &ie9 and- ifnecessary- change baseline processing settings. "or e8a$ple- you $ight 9ant to&ie9 or change an antenna $odel- ephe$eris type- acceptance criteria- or selectedsatellites. >ou can also sa&e baseline processing settings to a reusable te$plate.,elated tips are displayed in the lo9er portion of the dialog- or you can press )* atany ti$e for additional online help.
"or this tutorial- you should not $a=e any baseline processing changes.
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3. Bhen you are done- clic= O4 to close the Pro+ect Settings dialog.
>ou are no9 ready to process baselines in your project.
Step 3. Process %aselines
. 2elect S&r1ey ( Process Baselines. Or- clic= the Process Baselines icon onthe toolbar.
#he Process Baselines dialog displays sho9ing the progress of the process.
Bhen processing is co$plete- the processed baselines are listed in the table. >oucan sort the baselines as necessary by clic=ing any of the colu$n headings. "ore8a$ple- you can sort baselines to &erify that desired accuracy has been $et byclic=ing the 'ori56 Precision and -ert6 Precision colu$n headings.
#o see $ore infor$ation about any baseline- select the ro9 and clic= the Reportbutton to display the Baseline Processing Report6
. In the Process Baselines dialog- clic= the Sa1e button to sa&e the baselines.
#he project is re/co$puted 9ith the ne9ly created baselines.
If an error flag had displayed for a baseline in the Process Baselines dialog- you
9ould need to ensure all the infor$ation about that baseline is correct for e8a$ple-antenna type- antenna height- and point na$e. In so$e cases- re/processing thebaseline by itself 9ill clear a flag by using a different coordinate seeding. )ependingon the underlying proble$- there are a nu$ber of actions you could ta=e- includingpossibly editing the associated session.
In the ne8t step- you 9ill edit a session and reprocess a baseline as if an error flaghad been displayed in the Process Baselines dialog- e&en though one did not. #his9ill help fa$iliariCe you 9ith the Session E!itor.
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Step 4. E!it a session an! reprocess a %aselineIn this step- you 9ill edit a session associated 9ith a baseline to correct for a cycle slip onthe satellite signal in the data. #hen you 9ill reprocess the baseline.
. On the Plan -ie. tab- clic= the baseline bet9een the points P$41 and %#&.
A conte8t $enu displays.
. In the conte8t $enu- select Baseli!e P$41 ''' %#& (B44). #hen- right/clic=any9here on the Plan -ie. tab.
A conte8t $enu displays.
3. In the conte8t $enu- select Session E!itor.
#he Session E!itor dialog displays.
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#he Session E!itor allo9s you to &isually analyCe the @uality of the ra9 satellite datacollected for the selected session. 2atellites that pro&ided data for the sessioninclude blue andDor green lines on the ti$eline. #he blue line represents datacollected for the first point in the baseline in this case- P$41). #he green linerepresents data collected for the second point in the baseline in this case- %#&.
"or all satellites- you can see that there is a cycle slip around 3! on the satellitesignal in the data at point %#& green line. ;aps in the satellite data can indicatesatellite signal cycle slips- in&alid range errors- and other signal loss proble$s. #oi$pro&e the @uality of processed baselines- you can use the Session E!itor todisable unhealthy satellites- $as= bad sections of satellite data- and adjustoccupation ti$es.
#o understand ho9 to edit data in the session editor- you 9ill disable the first D3 ofthe data collected- starting at the beginning of the session to the ti$e just after thecycle slip.
4. ,esiCe the Session E!itor dialog &ertically so all satellite data is &isible.
*. Place the cursor in the G* satellite ro9 around the beginning of the session- 2:5*:25PM. #hen- clic= and drag the cursor to the lo9er right of the data set- essentiallyselecting all of the satellite data in the left D3 of the ti$eline.
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5. Bhen processing is co$plete- clic= the Sa1e button.
>ou are done processing ;%22 baselines. In the ne8t step- you 9ill identify anddisable dependent baselines in your project.
Step 5. I!entify an! !isa%le !epen!ant %aselinesIf you plan to use only independent baselines in the net9or= adjust$ent- you can use theTi"e
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. #o ensure you are 9or=ing 9ith the correct session- use 2hift clic= to select all ofthe baselines in session .
3. 1sing (trl clic=- deselect the independent baselines in session . #hese are thebaselines yo& !o not .ant to !isa%le.
P$41 ''' %#& (B44)
%ote that since you are using the obser&ation fro$ P!4 to the points on thee8terior of your net9or=- you $ust deselect this baseline.
5 ''' +si (B1,)
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%#& ''' +rey (B2)
5 ''' +rey (B21)
4. ,ight/clic= on any of the re$aining selected baselines in session and select=isa%le Baselines in the conte8t $enu.
*. ,epeat this procedure for sessions through *- ensuring all dependent baselines aredisabled.
#he independent baselines for each session are as follo9s. Tese !ase"#nes sou"d
not !e se"ected to !e d#sa!"ed.All other baselines should be selected to bedisabled.
2ession
P$41 ''' si-to (B5$)
3 ''' si-to (B1/)
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3 ''' +ilter (B10)
si-to ''' %#& (B1)
2ession 3
%#& ''' +ilter (B11)
+ilter ''' 5 (B3)
P$41 ''' +rey (B33)
+ilter ''' +rey (B24)
2ession 4
P$41 ''' +si (B40)
+si ''' 3 (B15)
si-to ''' 3 (B14)
3 ''' 5 (B2/)
2ession *
P$41 ''' si-to (B3*)
si-to ''' %#& (B25)
+rey ''' %#& (B2*)
+rey ''' 5 (B4)
6. #o &ie9 only the enabled obser&ations and baselines for postprocessing- do thefollo9ing
a. 2elect the Plan -ie. tab.
b. 2elect -ie. ( -ie. )ilter Manager.
#he -ie. )ilter Manager pane displays.
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c. 2elect the O%ser1ations tab in the botto$ area of the pane- and select theEna%le! o%ser1ations only option.
d. 2elect the GNSS =ata Types tab in the botto$ area of the pane- and select theEna%le! %aselines only >for postprocessing? option.
e. (lic= the @oo" In icon on the toolbar to enlarge the display on the Plan -ie.tab as sho9n here.
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>ou are done disabling dependent baselines in your project.
7. 2elect )ile ( Close Pro+ect.
#he Sa1e Canges dialog displays.
5. (lic=:es to sa&e your changes.