SunScanCanopy AnalysisSystemUser ManualSS1-UM-1.05
10 •••• Getting Started Document code: SS1-UM-1.05Installing the SunData s/w in your PCIn this section you will be told about the SunData s/w, and w
SunScan User Manual v 1.05 Getting Started •••• 11Running SunDataThe program you will run is SUNDATA.EXE (which was in the \PC directory on thedisk
12 •••• Getting Started Document code: SS1-UM-1.05Communication checks:SunScan probe to PCFor this test you will need the SunScan probe, and the Sun
SunScan User Manual v 1.05 Getting Started •••• 13Running SunData in WindowsAt this stage you may wish to install the SunData program so that it ru
14 •••• SunScan Tutorial Document code: SS1-UM-1.05SunScan TutorialAbout this tutorialWhat you will learnThis tutorial takes you step by step throug
SunScan User Manual v 1.05 SunScan Tutorial •••• 15Warning! If you were already in the Psion System Screen, you’ll see a message ExitSystem Screen?
16 •••• SunScan Tutorial Document code: SS1-UM-1.05Using a PC instead of the WorkaboutStarting the PC softwareSkip this section if you are using the
SunScan User Manual v 1.05 SunScan Tutorial •••• 17(This page is intentionally blank)
18 •••• SunScan Tutorial Document code: SS1-UM-1.05Setting up a measurement sessionWorking through the menu optionsIn normal use the SunData softwar
SunScan User Manual v 1.05 SunScan Tutorial •••• 19You will go through these different combinations later in the tutorial, and there isalso a route
Notices CopyrightAll rights reserved. Under the copyright laws, this manual may not becopied, in whole or in part, without the written consent
20 •••• SunScan Tutorial Document code: SS1-UM-1.05Taking readingsUsing the Emulator modeYou have now configured all the settings necessary to start
SunScan User Manual v 1.05 SunScan Tutorial •••• 21♦ Now Set the Display to PAR (Menu,Settings, Display, Enter)The procedure for taking, displayin
22 •••• SunScan Tutorial Document code: SS1-UM-1.05This time you will see the value of the PAR reading from the probe. Now is a goodtime to play ar
SunScan User Manual v 1.05 SunScan Tutorial •••• 23By now you may have accumulated quite a lot of readings in Data.PRN the defaultdata file. There
24 •••• SunScan Tutorial Document code: SS1-UM-1.05AveragesSunData can calculate and store the average of all the samples in a plot, as well asretai
SunScan User Manual v 1.05 SunScan Tutorial •••• 25♦ Select Format CSV: Yes in the Review dialog boxor from the file itself♦ Press Menu, Format C
26 •••• SunScan Tutorial Document code: SS1-UM-1.05Navigating in the File Transfer box• The Tab key (➙➙➙➙❘❘❘❘) will move you from one <field>
SunScan User Manual v 1.05 SunScan Tutorial •••• 27You will immediately get a "Sending" message showing the progress of the transferuntil
28 •••• SunScan Tutorial Document code: SS1-UM-1.05RS232 communication problemsRS232 links between computers are notorious for giving difficulties,
SunScan User Manual v 1.05 SunScan Tutorial •••• 29SunData Screens on the Workabout Note: these screensare only required if youare measuring
SunScan User Manual v 1.05 •••• 3ContentsIntroduction...
30 •••• Menus and Screens Document code: SS1-UM-1.05Menus and ScreensThe following table shows the menu options and settings for the Psion Workabout
SunScan User Manual v 1.05 Menus and Screens •••• 31SettingsTitlesTitle ≤≤≤≤ 40 chars.Title name is stored in the data file heading, and is display
32 •••• Menus and Screens Document code: SS1-UM-1.05QuitExit the SunData program
SunScan User Manual v 1.05 More Psion and file handling notes •••• 33 More Psion and file handling notesNavigating Psion directories and screensThe
34 •••• More Psion and file handling notes Document code: SS1-UM-1.05Psion subdirectory usage in file select dialogsIn the Workabout file selection
SunScan User Manual v 1.05 More Psion and file handling notes •••• 35To copy to another subdirectory, you must add that information to the filename
36 •••• More Psion and file handling notes Document code: SS1-UM-1.05If you have other (non-data) files you want to keep, copy them to the internal
SunScan User Manual v 1.05 More Psion and file handling notes •••• 37Default .cfgEvery time you exit the SunData program, the program state is stor
38 •••• More Psion and file handling notes Document code: SS1-UM-1.05Displaying data files on your PCAs soon as you have transferred data files from
SunScan User Manual v 1.05 More Psion and file handling notes •••• 39Data file layouts and data groupsIf you want to get a good idea of how the dat
4 •••• Document code: SS1-UM-1.05Menus and Screens ...30More Psion a
SunScan User Manual v 1.05 Measurement options •••• 41Measurement optionsExperiment designThis section discusses the factors that bear on the exper
42 •••• Measurement options Document code: SS1-UM-1.05Canopy type and BFS practicalitiesCanopy type is the next variable to be considered. As a gene
SunScan User Manual v 1.05 Measurement options •••• 43This means that in strong sun (high Beam Fraction) the canopy volume sampled isfairly small a
44 •••• Measurement options Document code: SS1-UM-1.05Advice on Absorption and ELADP valuesAbsorptionAbsorption is the percentage of incident PAR th
SunScan User Manual v 1.05 Measurement options •••• 45Estimating ELADP in the fieldIf the canopy shows a clear predominance of horizontal or vertic
46 •••• Measurement options Document code: SS1-UM-1.05SunScan System Measurement modesWorkabout setupWith your planned experiments in mind, you shou
SunScan User Manual v 1.05 Measurement options •••• 47The Autolog functionYou can set up the SunScan system to operate automatically in any of its
48 •••• Measurement options Document code: SS1-UM-1.05Battery and memory managementWhen leaving the SunScan probe to Autolog over a few days, the me
SunScan User Manual v 1.05 Measurement options •••• 49Levelling is most critical when you are using the probe:• for the incident radiation above t
SunScan User Manual v 1.05 •••• 5Maintenance and repair... 64Checking the
50 •••• Measurement options Document code: SS1-UM-1.05Finding North, and setting the shade ringIf you are taking measurements which require only the
SunScan User Manual v 1.05 Measurement options •••• 51PAR calibrationsThis section describes the basis for the light calibrations used in the SunSc
52 •••• Measurement options Document code: SS1-UM-1.05You should not expect to have to do this very often. The photodiodes and lightmeasurement circ
SunScan User Manual v 1.05 Measurement options •••• 53Environmental and moisture protectionYou should be aware of the different levels of protectio
54 •••• LAI theory Document code: SS1-UM-1.05LAI theoryIn this section we shall explain as fully as we can how the SunScan computes itsreadings of l
SunScan User Manual v 1.05 LAI theory •••• 55Equation fitting and inversionThe results of the computer modelling, while accurate, are not suitable
56 •••• LAI theory Document code: SS1-UM-1.05Beer's law for canopy absorptionBeer's law occurs in many situations where events happen at r
SunScan User Manual v 1.05 LAI theory •••• 57The next section derives the transmission of light from a uniform overcast skythrough a uniform infini
58 •••• LAI theory Document code: SS1-UM-1.05Diffuse light transmission (cosine corrected sensor)Modelling the canopy transmissionAccounting for inc
SunScan User Manual v 1.05 LAI theory •••• 59In detail:• The canopy is divided into horizontal layers of LAI 0.1• Direct beam absorption by each
6 •••• Introduction Document code: SS1-UM-1.05IntroductionHow to use the manualsThis manual tells you how to use your SunScan Canopy Analyser and it
60 •••• LAI theory Document code: SS1-UM-1.05Accuracy of LAI calculationsWhen used to predict LAI from transmitted fraction, the functions used in t
SunScan User Manual v 1.05 LAI theory •••• 61This was again calculated numerically and curves fitted to the data with similaraccuracy as above. The
62 •••• LAI theory Document code: SS1-UM-1.05The results were then analysed in terms of La, the LAI of a canopy of black leavesthat would give the s
SunScan User Manual v 1.05 LAI theory •••• 63Daughty, Craig S T (1990). Direct measurements of canopy structure. RemoteSensing Reviews 1990 vol 5(1
64 •••• Technical Reference section Document code: SS1-UM-1.05Technical Reference sectionMaintenance and repairChecking the batteriesThe SunScan sys
SunScan User Manual v 1.05 Technical Reference section •••• 65Workabout battery managementWhen you receive the Workabout, the installed battery pac
66 •••• Technical Reference section Document code: SS1-UM-1.05Checking the PAR calibrationVarious techniques for checking the SunScan system PAR cal
SunScan User Manual v 1.05 Technical Reference section •••• 67TroubleshootingPsion WorkaboutThere is no SunData Icon in the system screen.• From t
68 •••• Technical Reference section Document code: SS1-UM-1.05“Insufficient power to write data” reported.• Recharge the Ni-Cd battery pack, or rep
SunScan User Manual v 1.05 Technical Reference section •••• 69Technical SupportDistributor contactIf you have a problem, please call your local dis
SunScan User Manual v 1.05 Introduction •••• 7SunScan probeThe light sensitive “wand” of the probe is 1 metre long, containing 64 photodiodesequall
70 •••• Technical Reference section Document code: SS1-UM-1.05SpecificationsSunScan Probe type SS1Active area 1000 x 13 mm wide. Sensor spacing 15
SunScan User Manual v 1.05 Technical Reference section •••• 71Carrying Case type SCC1Moulded plastic case with O-ring seal for moisture and dust
72 •••• Technical Reference section Document code: SS1-UM-1.05PAR PerformanceThe graphs below show the actual spectral and cosine response curves fo
SunScan User Manual v 1.05 Technical Reference section •••• 73Cosine responses of probe and BFSThe cosine response curves show a diminishing respon
74 •••• Appendices Document code: SS1-UM-1.05AppendicesA. Logging the probe as a Linear Quantum SensorThis application of the SunScan probe turns it
SunScan User Manual v 1.05 Appendices •••• 75B. Logging the Beam Fraction sensorYou can log the Beam Fraction sensor in a similar manner, using the
76 •••• Appendices Document code: SS1-UM-1.05C. Upgrading the SunScan systemFrom time to time, new issues of the software programs in the SunScan sy
SunScan User Manual v 1.05 Appendices •••• 77D. File transfer between Workabout and PCChoice of different programsFor the transfer of data files fr
78 •••• Appendices Document code: SS1-UM-1.05If PsiWin has difficulty establishing the link to the Workabout at any stage,powering down PsiWin and t
SunScan User Manual v 1.05 Appendices •••• 79♦ From the Psion System Screen, press Menu, Disk, Directory, Enter.♦ Press ←←←← →→→→ to select the D
8 •••• Getting Started Document code: SS1-UM-1.05Getting StartedAfter unpacking the SunScan consignment and checking the contents against thepacking
80 •••• Appendices Document code: SS1-UM-1.05Example using RCOMOn the Workabout:♦ Exit from the SunData application on the Workabout by pressing ∪∪
SunScan User Manual v 1.05 Appendices •••• 81E. Alternative file transfer mechanismsSending a file to a Communication programYou can send your file
82 •••• Appendices Document code: SS1-UM-1.05F. GlossaryBeam fraction - the fraction of the Total incident PAR in the Direct beam.Beam Fraction Sens
SunScan User Manual v 1.05 •••• 83Local time - the time used in your particular time zone. It varies from GMT by anamount depending on longitude,
84 •••• Index Document code: SS1-UM-1.05IndexAAbout... 31Absorptionincomplete..
SunScan User Manual v 1.05 Index •••• 85HHemispherical response...58, 80Hot keys ...
86 •••• Index Document code: SS1-UM-1.05Transfer, file ..... 30Transmitted fraction...
SunScan User Manual v 1.05 Getting Started •••• 9After some minutes of inactivity, the Workabout screen will automatically blankitself to save powe
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