NTT-MAN-ESO-90100-00..
Contents
1. or It5ra The current value of DUT can be found at http hpiers obspm fr iers bul bulb bulletinb dat Pointing Model for the NTT NTT MAN ESO 90 100 0002 5 ccseiMsg wtitcs ccsei Message Command Window e UELL A File Options Windows Help Environment wt5tcs Process prsControl Command Parameter Simulation Mode NORMAL Error Checking CHECK_ALL Receive Timeout ms 0 CCS Engineering User Interface version2 16 The local environment is w 5 s In total there are 34 environments defined in your network lemcal lemcd lemer lemmi lemsu lemsv lsocal lsofi Wada adb taga Wagh Hjalt uaz Ubu b Wina The cmdManager is apparently alive It reports that 135 CDTs are loaded cmdhfanager pan TestServer airmLcuLogger bookServer testServer testServer testServer2 testServer3 te Current option settings are remember that you can change them all with the Options menu Simulation Mode is OFF Translation of Synonyms into Commands is enabled The Synonym Mode is You are using oniy Commands no Synonyms Error Checking is set to CHECK At The Timeout for message receive is set to 0 ms See the short help below for the most important electric keys 1 wt5tcs prsControl Com gt SETUP TEL AG GUIDESTAR NONE Replies _ Display multiple reply message on several lines I Error Stack SI List of Pending Commands Figure 2 2 Guideprobe disable 4 Active Optics Use2. takes a short exposure calculates the error vectors moves the star to center of rotator by offsetting the telescope store the errors and then move to next star Manual mode procedure is practically same than old pointing model Making a New Pointing Model The making of a new pointing model requires several steps which should be carefully hand led if a good preset accuracy is required To make a pointing model the following steps are to be taken 1 2 Check rotator center in database and in the telescope 1 3 Preparation on TCS 1 4 Measure the pointing errors 1 4 1 Automatic Procedure 1 4 2 Manual Procedure 1 5 Return TCS to Initial State Rotator Center in Database and Telescope First focusing telescope and correct in the best way the mirror aberrations image analysis focus Mark down on RTD the point was the telescope pointing is required This must be the center of rotation of the rotator For checking the center of rotation of the rotator presetting to any star not too bright and setting guide probe to center field Offset it from the center by 20 arcs and rotate the rotator 180 degrees to move the object around Using the drawing tool of RTD to draw a circle following the rotating object makes this task easier Estimate the center of rotator and put down a good mark on it Write down x and y values from RTD Make sure that the values of rotator center are the correct ones for it read the values in the database wit
3. A Sia lS Delles Yi EE Selec ior 25 08 eq b Date 10 Jan Az Time 1r 16 2O00 4000 5 4001 4001 5 Lime Figure b Evolution of Side B models _000__
4. EUROPEAN SOUTHERN OBSERVATORY Organisation Europ enne pour des Recherches Astronomiques dans H misphere Austral Europaishe Organisation f r astronomische Forshung in der s dlichen Hemisph re LA SILLA OBSERVATORY El TT NEW TECHNOLOGY TELESCOPE Pointing Model for the NTT NTT MAN ESO 90100 0002 Date 2001 Oct 10 E S O INTERNAL USE ONLY Prepared M nica Castillo 2001 Oct 10 Reviewed Jorge Miranda 2002 Feb 14 Approved Olivier Hainaut 2002 Feb 16 Pointing Model for the NTT NTT MAN ESO 90 100 0002 2 1997 Oct 05 Original Manual Doc No VLT MAN XXXX 2002 Feb 16 Complete Revision 1 Introduction LA 10 10 l l l 2 2 4 Adjusting a Model to the Measured 1 5 Installing the Model on the TCS Control System l 6 Fitting a Model to Outdated Pointing Data 1 7 How to Test a Previous Model with Newly Taken Data 12 Pointing Model for the NTT NTT MAN ESO 90 100 0002 3 Introduction This manual provides a description and operation of the Pointing Model POM software for the NTT 1 1 Relevant Document TPOINT user manual Starting the Pointing Modeling Package Operations At the moment there are two ways to make it Automatic and Manual mode Using automatic mode is preferable because it is more easy and fast Basically automatic mode chooses stars from a chosen catalog and template file Template file define regions of the sky where a measurement must be obtained The template makes a preset and then
5. S dat and then press the LOAD button on pom GUI If you have just finished the measurements you can press Use current error file then Load Check on the TPOINT output that the error file has been loaded A list of the measurements will be displayed If the file is not found a error will be displayed instead of the measurement list Select the terms used at NTT fit the measurements and display the residuals This is done if one click with the PommefFrittes button This can be done manually using 2 a and 2 b a Select the term to be used on the fitting using the select buttons on the GUI Presently at the NTT we use A IE CA AN AW NPAE TF TX There are two ways of selecting the term Select term set or Select the term with Use on b Press button FIT This will actually perform the fitting and will display the calculated values on the xterm Check for a low Sky rms amp population They should be 3 arcs or less Display the result of the fit Press the button PLOT a9 If rms is high gt 1 look for abnormal measurements Check the residual values pressing button RESIDUAL on pom GUI and look the listing on the xterm Look for object with very high residuals This could be a star that had been wrongly identified Then the idea is to mask this object out Fill in the number of the object on the field and press the MASK button Then repeat the fitting like in point 2 NOTE if more than one object needs to be masked out d
6. User Interface Version 2 16 The local environment is w S s In total there are 34 environments defined in your network femcal lemncb lemcr lemmi lemsu lemsv lsocad lsofi Sada adb Saga Wagh Halt tarz Ubu thd Siac The cmdManager is apparently alive Itreports that 135 CDTs are loaded anager pan TesiServer airmLcuLogger bookServer testServer tesiServer testServer2 testServer3 te Current option settings are remember that you can change them all with the Options menu Simulation Mode is OF F Translation of Synonyms into Commands is enadied The Synonym Modeis You are using oniy Commands no Synonyms Error Checking is set to CHECK_ALL The Timeout for message receive is set to 0 ms See the short help below for the most important electric keys 1 wt5tcs prsControl Com gt SETUP TEL AG GUIDESTAR CATALOG r fd j j Replies _ Display multiple reply message on several lines eee qq Error Stack List of Pending Commands No pending replies on commands Reply Box Select line to view detailed reply contents resp error display rs ey Figure 2 10 Guideprobe Enable ADJUSTING A MODEL TO THE MEASURED ERRORS This task is handled by pomFits which is an interface to TPOINT Then following steps are necessary to execute l Input the error file name in the corresponding field on POM GUI Type in the complete data path vltdata pointing yy mm dd_UT5_N
7. dinates than our control system If the correct values are loaded check the new model by presetting some bright objects If pointing is OK then save the new model as the default model Pressing Install Model on pom GUI does this After this the model will be saved on special files on directory vltdata config And they will be used to load the model when the LCUs are booted or the side changed etc FITTING A MODEL TO OUTDATED POINTINDG DATA It is possible if desired to remake a model from previously measured pointing data This maybe useful if new terms are to be tried out or just to recover the error curves for analysis All data measures is kept in directory vltdata pointing From the name it should be easy to identify the date when the data was taken This is the reason of enforcing the use of the naming convention previously mentioned This is also the reason why users must be careful not to overwrite old data by using the same filenames again To remake a model proceed exactly as it is done for fitting a model to newly taken data but use the name of the file containing the old data as input for the LOAD button HOW TO TEST A PREVIOUS MODEL WITH NEWLY TAKEN DATA It is possible to check how good a previous model fits on newly taken pointing data This might be useful in several situations among them 1 2 3 To check how stable the pointing models are to see which 1f there are pointing terms which are changing
8. dir vitdata pointing TPOINT Telescope Pointing Analysis System Version 7 6 A File Browser Figure 2 7 Stars Catalog Selection Pointing Model for the NTT NTT MAN ESO 90100 0002 9 Figure 2 8 Template File Selection H POM Graphic User Interface wt5tcs lt 2 gt File Std Options Figure 2 9 Manual Control Interface Pointing Model for the NTT NTT MAN ESO 90 100 0002 10 Automatic Procedure bd After of the preparation on TCS and POM we are ready to start the new measurement automatically Click Start on GUI panel Check the tail if no data stored it means system failure Normally data are stored with name coordinates etc means system work properly Don t worry about the error boxes which pop up see below the description of possible errors in appendix A If everything goes O K make a coffee and relax check telescope behavior and wait till template finished Manual Procedure ae SC If automatic procedure failed after of the preparation on TCS we can start the new measurement manually In POM panel click Manual Control a panel will pop up Click Lookup and list of star will be shown in list Click Preset if you are happy for characteristic of first star 1f not choose other one Center the star in autoguider RTD pressing Center Object normally the center of rotation of the rotator If the object happens to be a double star reject the object Selec
9. ght 1990 Motorola Inc c Copyright 1990 1991 1992 Cornell University c Copyright 1989 1991 The University of Maryland c Copyright 1988 Carnegie Mellon University RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the U S Government is subject to restrictions as set forth in sub paragraph c 1 ii of the Rights in Technical Data and Computer Software clause in DFARS 252 227 7013 Hewlett Packard Company 3000 Hanover Street Palo Alto CA 94304 U S A Rights for non DOD U S Government Departments and Agencies are as set forth in FAR 52 227 19 c 1 2 wt5tcs tcs 501 gt pomguiStart Starting vlt introot bin pomFits Starting vlt introot bin pomInstall Starting vlt introot bin pomMeasure Starting vlt introot bin pomAuto Starting vlt introot bin pomgui wt5tcs tcs 502 gt Figure 2 4 POM Graphic User Interface Pointing Model for the NTT NTT MAN ESO 90100 0002 7 POM Graphic User Interface wt5tcs File Options Figure 2 5 POM Graphic User Interface Man Panel Pointing Model for the NTT NTT MAN ESO 90 100 0002 8 POM Graphic User Interface wtStcs TPOINT Output 2001 08 11 002217258 906 765 pomFits Application started proc name pomFits H 2001 08 11 00 21 59 005504 Init 2001 08 11 00 21 59 004455 pomFITS_MAIM_TASE CtFindIniFile 2001 08 11 00221559 004655 Looking up file tpoint ini 2001 08 11 O0 21 59 006370 UND vl t MARZOOLACCS ete tpoint 2001 08 11 O0f21 59 007196 Point
10. h the command dbRead in wtStcs xterm Figure 2 1 If in A side type dbRead wt5tcs Appl_data TCS msw insData data tccdNA refX dbRead wt5tcs Appl_data TCS msw insData data tccdNA refY If in B side type dbRead wt5tcs Appl_data TCS msw insData data tccdNB refX dbRead wt5tcs Appl_data TCS msw insData data tccdNB refY If values founded are different than the values to database change it by writing in wt5tcs xterm If in A side type dbWrite wt5Stcs Appl_data TCS msw insData data tccdNA refX lt value gt dbWrite wt5Stcs Appl_data TCS msw insData data tccdNA refY lt value gt If in B side type dbWrite wt5Stcs Appl_data TCS msw insData data tccdNB refX lt value gt dbWrite wt5Stcs Appl_data TCS msw insData data tccdNB refY lt value gt Pointing Model for the NTT NTT MAN ESO 90 100 0002 4 tcs wt5tcs c Copyright 1989 1991 The University of Maryland c Copyright 1988 Carnegie Mellon University RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the U S Government is subject to restrictions as set forth in sub paragraph c 1 ii of the Rights in Technical Data and Computer Software clause in DFARS 252 22 013 Hewlett Packard Company 3000 Hanover Street Palo Alto CA 94304 U S A Rights for non DOD U S Government Departments and Agencies are as set forth in FAR 52 227 19 c 1 2 wt5tcs tcs 384 gt dbRead wt5tcs ppl_data TCS msw insData dataltccdNA refX DOUBLE va
11. in time to be able to make trend analysis of different terms The procedure to check an old model with new data is the following using the pomFits part of pom GUI 4 SO ONDA 10 11 12 Input the file name holding the measured pointing data the press the LOAD button Select the terms to fit with the select buttons Usually ie ia ca an aw tx tf npae or pommesFrittes Press button FIT until change is 0 Usually 3 times is enough Enter FIX in field next to EXEC button Press EXEC button This will execute the command FIX Press button CLIST to check that the select term are fixed Assign to each of the terms the value they had in the old model For this enter in the field besides EXEC the name of the term with the corresponding value Press the button EXE For instance IE 123 32 lt press EXEC button gt Press button CLIST to check that all the terms are fixed and having the value that had been assigned Press button FIT until change is 0 The RMS 7 Sky Population numbers will reflect the quality of the fitting of the old model with the new data Press button PLOT a9 The error curves will reflect the residual errors If the effect of a single term is to be seen the following steps can be done using the pom GUI 13 14 15 16 K Deselect the desired term with the corresponding select button Select the desired term to unfix it Press CLIST to check that the term is not fixed Press FIT And check the new value for
12. lue 205 000000 wt5tcs tcs 385 gt dbRead wt5tcs Appl_data TCS msw insData data tccdNA refY DOUBLE value 145 700000 wt5tcs tcs 386 gt dbRead wt5tcs Appl_data TCS msw insData data tccdNB refx DOUBLE value 191 000000 wt5tcs tcs 387 gt dbRead wt5tcs Appl_data TCS msw insData data tccdNB refY DOUBLE value 142 500000 wt5tcs tcs 388 gt Figure 2 1 Value of Rotator Center in Database Preparation on TCS bd Before starting the POM measurement process you must do some preparation on TCS Send guide probe to the center field position Use the corresponding button on TCS main panel Disable the autoguider in order to avoid guide probe movement To do this call ccseiMsg program then select Figure 2 2 Environment wt5tcs Process prsControl Type SETUP TEL AG GUIDESTAR NONE To check it make a preset the guide probe mustn t move from center field Shutdown the active optics The POM software will by default try to make a ONECAL for each preset At the NTT this will cause a warning Pop Up To avoid this Shutdown the Active Optics Figure 2 3 See possible errors below Apendix A Set the delta UT value for the day In wt5tcs send the command SETDUT to program trkwsControl using ccseiMsg The value of DUT can be checked by giving the command GETDUT to program xxxtrkControl on the corresponding tracking LCUs xxxtrkControl alttrkControl for It5alt aztrkControl for It5az rottrkControl for ItSrb
13. o be started and pomFits program will be initialized Click Load Catalog and choose catalog from vltdata pointing Figure 2 7 Select Hip fk5 tcs Create the name of the file that will hold the error measurements This is done by choose Auto Name and then pressing button labeled Create File on the pom GUI The name should follow the naming convention for error files The file containing the pointing errors are created on the following directory vltdata pointing In wtStcs xterm write tail f vltdata pointing lt error_file gt to check points written to error file a new line will after each measurement Click Load is side of Template file tpl and choose template from VIINTROOT NTTTCS config Figure 2 8 For a full model chose pom Template64 tpl To check the system use pom Template5 tpl In case of emergency if you have to do a POM measurement during observations use pom Template24 tpl template name TemplateN tpl where N number of stars on template Check integration time and window size from Manual Control panel To change integration time or box side for automatic procedure you have to open Manual Control window Figure 2 9 There you will have input boxes for window size and integration time For NTT a good range of integration time is from 0 1 to 0 3 seconds The other parameters don t need to be changed Then in file menu select quit the time will be stored automatically tcs wt5tcs c Copyri
14. o it one by one If you enter more than one number on the entry field you will mask out all measurements between first and second entry If sky rms and population is OK save the model on a file The file name should be like the following yy mm dd_UT5_NSmodel dat similar to the input file wh model Then press button SAVEMOD on the GUI Pointing Model for the NTT NTT MAN ESO 90 100 0002 12 INSTALLING THE MODEL ON THE TCS CONTROL SYSTEM The final step is to install the new calculated model on the telescope control system This is done by program pomInstall L Fill in entry field labeled Model to install the name of the file containing the model This is the same name that was used in step 4 on the model fitting section Be sure to include the dat extension Then press the button SHOW MODEL in the pom GUI Please check that the values shown on the GUI are the same displayed in the xterm after the command FIT After Load Model and make some presets to check if model is good Load model will send new pointing model to LCUs Verify that the model was correctly propagated to tracking LCUs To do use CCSEI send command GETTERM to program xxxtrkServer on each of the tracking LCUs xxx 1s alt az ra or rb They should return the same values that are shown on pom GUI Please note that all the terms will have their signs inverted with respect to what came out from the fitting This is because TPOINT uses a different convention on the coor
15. r Interface wt5tcs 1 O16 File Help TARTUP A H W Results of the image analysis SES SES SE rms in arcseconds Cyclic closed loop corrections Tilt 0 000 Set of closed loop corrections Defocus 0 000 EE Decentering coma 0 000 ba sal ate tac Spherical aberration 0 000 One open loop setting Astigmatism 0 000 Set of l analyses Triangular coma 0 000 Stop current command Quadratic astigmatism 0 000 Residual r m s Store the defocus value Errors on the LCU Errors on the WS For details see the error stack Engineering Interface Command Feedback Window Options Figure 2 3 Shutdown Active Optics Pointing Model for the NTT NTT MAN ESO 90 100 0002 6 Measuring the Pointing Errors The making of a pointing model is done using the facilities of the pointing model package POM This package consists on three programs which are interfaced through the use of a single GUI Graphic User Interface Using program pomMeasure does the measuring the pointing errors Basically the idea is to preset the telescope to a given object of well know coordinates and measure the difference between the position were the object is expected to be and the position were the object actually is after the preset L To start the programs and the GUI Figures 2 5 and 2 6 run on a TCS xterm on wt5tcs the script pomguiStart Figure 2 4 This will start the three programs pomMeasure pomFits pomInstall The pom GUI will als
16. res output window NOTE2 if you stop automatic procedure through Stop button agwsControl can stay to state AG busy Just init the agws from TCS Status panel and everything will became normal NOTES if SETUP TEL AG GUIDESTAR NONE CATALOG doesn t work from ccseiMsg use the msgSend to send message Syntax msgSend wt5Stcs prsControl SETUP TEL AG GUIDESTAR NONE CATALOG Pointing Model for the NTT NTT MAN ESO 90 100 0002 15 Apendix B NTT POINTING MODELS EVOLUTION Figures a and b display the evolution of the models used at the NTT No significant trend is observed S00 ES MIDAS ee a gg LES Quest Table model MOL Lurie itim Gage WW TA Scales On Cees Wi 2 zrl TA Selection 751 08 eq a 100 Date 10 Jan 202 LCA Time 18 01 55 TE O00 ZU E ZOOL 001 5 OO Lime i MIDAS 9 oo Uea Quest Table model ol Lune 2 time Wd iAH Gales On Coes wi D Didde AM Selection 751 08 eq a Date 10 Jan A Time 17 53 16 O00 ZU E ZOOL 001 5 UU Lime Figure a Evolution of Side A models Pointing Model for the NTT NTT MAN ESO 90 100 0002 S00 ES MIDAS ges OONOV IA Leer quest Table model DOL Lurie e tine Yoo W fe Sra lee OU OL61629 Yo 2 56271 TA Selection 5ide E D 100 Date 10 Jan 2002 CA Time 17 54 26 LE ZU z000 E 2001 z001 5 Lime MIDAS 9 gonov Uea Quest Table model Gob LUTE i time Wd
17. t a new pressing Next When the object is properly centered save the measurement using the button Store The values of the reference position of the object and the value of the actual corrected position of the object will be saved to the file that was create Check that the measurement in pom panel or manual control panel increase after each Store Then press Next Repeat steps 4 gt 5 gt 6 gt 7 until the last star have been visited For a good pointing model the recommended number is 64 objects Then close the manual control panel window Return TCS to Initial State After having concluded the measuring of the pointing errors you should return to the initial state of the TCS with the following steps 1 Enable guide probe using ccseiMsg Figure 2 10 select Environment wtStcs Process prsControl Type SETUP TEL AG GUIDESTAR CATALOG If you make a preset the guide probe must be move from center field to the first guide star 2 Start the active optics Active Optics panel clicking Engineering Interface Figure 2 3 and click INITAO in Active Optics Engineering panel Pointing Model for the NTT NTT MAN ESO 90 100 0002 11 sal H ccseiMsg wt5tcs ccsei Message Command Window x File Options Windows Help Environment wtStcs Process prsControl Command Parameter Simulation Mode NORMAL Error Checking CHECK ALL Receive Timeout ms 0 CCS Engineering
18. the single term that was unfixed and the new RMS Pressing the PLOT A9 button will display the error curves The residuals can be check in the Tpoint output Pointing Model for the NTT NTT MAN ESO 90 100 0002 13 POINTING MODEL TERMS USED AT NTT Value Range Index error in elevation 100 140 Index error in azimuth 280 310 Left Right collimation error 120 150 Azimuth axis misaligment North South 10 13 Azimuth axis misaligment East West 20 25 AzZ El non perpendicularity 16 20 Tube Flexure sine 10 13 Tube Flexure tangent 9 13 Pointing Model for the NTT NTT MAN ESO 90 100 0002 14 Apendix A Possible errors which you can and probably will get are following Image analysis command not permitted Don t worry about this You are just not using the active optics Procedure will try to apply ONECOR every time for star where it is Anyway the error vector measurement will be taken and telescope will continue to next star Cannot start TCCDs Don t worry Procedure starts and stops TCCDs by itself If it cannot take a exposure it will continue to next one You don t even have to start camera for procedure Of course camera status have to be ONLINE Failed to execute POINOBJ No worries again The coordinates of entry are out of the limit and that entry will be skipped and next one is chosen NOTE1 Allways keep the tail open to see which points are really saved Sometimes GUI gives wrong values to Measu
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