Carnegie-DIMM Software Documentation

Directory Structure

The following directory structure is hard-coded and has to be exactly as described here:

Directory\File                      Comment
c:\Cdimm\Catalogs\                  star catalogs used in sky-map
                  dimm.cat          subset of SAO star catalog
                  dimm.idx
                  sao.cat           SAO star catalog [optional]
                  sao.idx                        [optional]
c:\Cdimm\Debug\cdimm.exe            executable
c:\Cdimm\ini\                       setup files
             ccd5.ini               description of ST5-CCD 
             ccd7.ini               description of ST7-CCD 
             cdimm.ini              DIMM-system setup
             telescope.ini          telescope setup
c:\Cdimm\Logfiles\                  output directory for logfile
c:\Cdimm\Objects\                   object lists
                 dimm.objects       regular DIMM operations
                 mass.objects       MASS-DIMM operations
c:\Cdimm\Release\cdimm.exe          executable [optional]
c:\Cdimm\SBIG\                      SBIG library (development only)
c:\Cdimm\src\                       source files (development only)
c:\Cdimm\cdimm.sln                  MS-VC solutions file (development only)
c:\Cdimm\cdimm.vcproj               MS-VC project file (development only)

Setup Files

ccd5.ini

name          ST5    ; just a descriptive character string
device        lpt    ; parallel port
dimx          320    ; CCD width [pixels]
dimy          240    ; CCD height [pixels]
pixsize       10.0   ; pixel size [micro-meters]
egain         1.25   ; electrons/ADU
enoise        25.0   ; read noise [electrons]
cfzm          2.0e8  ; counts-for-zero-magnitude (norm. to 10 inch aperture)
satlev        30000  ; saturation level (15 bit ADC)
temp-ccd      0.0    ; setpoint for temperature regulator

ccd7.ini

name          ST7    ; just a descriptive character string
device        usb    ; USB port
dimx          765    ; CCD width [pixels]
dimy          510    ; CCD height [pixels]
pixsize       9.0    ; pixel size [micro-meters]
egain         2.3    ; electrons/ADU
enoise        15.0   ; read noise [electrons]
cfzm          2.0e8  ; counts-for-zero-magnitude (norm. to 10inch aperture)
satlev        60000  ; saturation level (16 bit ADC)
temp-ccd      0.0    ; setpoint for temperature regulator

cdimm.ini

ident           dimm0       ; first part of log/data file names
ccd-type        ST7         ; {ST5,ST7}
tcs-online      1           ; {0,1} {simulator,real}
ccd-online      1           ; {0,1}
measure-time    60          ; length of each measurement [seconds]
star-radius     4           ; [pixels]
exp-long        0.050       ; exposure time for test exposure [seconds]
exp-t1          0.005       ; exposure time in DIMM-mode [seconds]
file-num        1           ; currrent FITS file number (tests only)
twilight        -12         ; sun-altidude (start/stop condition)
am-limit        1.5         ; airmass limit (star selection)
optmag          2.5         ; preferred star magnitude (star selection)
vbin            10          ; vertical binning (ST7-scan mode)
mass-port       uuuuu       ; default=0 (no MASS)
mass-host       x.y.z.host  ; IP number of computer running 'turbina' (optional)

dome-host       x.y.z.host  ; IP number of 'Acromag' controlling the dome (optional)

auto-dimm       0           ; start DIMM measurements at program startup (default=0)

verbose         0           ; default=0 (verbosity of logfile)

massfov-x1      312         ; restricted MASS field of view (ST-7 specific)
massfov-x2      451
massfov-y1      213
massfov-y2      433

auto-save       C:\Data     ; save scan-exposures, default="" (not used)

auto-setup      1           ; power-up CCD/telescope at startup (default=1)
auto-dome       1           ; open/close dome in AutoDIMM mode (default=1)

meteo-host1     mag2tcs     ; Magellan domes used as weather indicator
meteo-host2     mag1tcs     ; default="" (not used)
wind-limit      35          ; default=30

spiral-size     1           ; {0,1,2,3,4} default=0 (auto)

fthreshold      0.5         ; focus correction threshold [pixels] (default=1)
cthreshold      10          ; re-center threshold [arcsec] (default=15)

telescope.ini

name            LX200GPS    ; descriptive name (LX200 supported only)
device          com1        ; serial port
baudrate        9600
parity          N
bits            8
tellong         -118.1      ; [deg] longitude
tellat          +34.1       ; [deg] latitude
diameter        0.254       ; [m] full diameter (10 inch)
f-ratio         9.9033      ; focal-ratio 
aperture        0.095       ; [m] sub-aperture diameter
separation      0.150       ; [m] sub-aperture separation
spread          40.0        ; star-separation in best focus [arcsec]
fspeed          0           ; [pixel/sec] focus-motor speed
pa-offset       180         ; [deg] CCD orientation on sky
gps             0           ; GPS working (1=yes)
az-limit1       0           ; [deg] azimuth limits (star selection)
az-limit2       360         ; [deg]
zd-limit        5           ; [deg] min. zenith distance (star selection)

time            0           ; use telescope time for log/data-files (default=0)

safe-az         187.783     ; azimuth parking position (default: not used)
safe-el         -0.133      ; elevation parking position (default: not used)

Notes:
fspeed: Please set this to a slightly smaller value than the measured value to avoid over-shooting in the auto-focus control loop.

Object Lists

Name    | Alpha (R.A.) | Delta (Dec.) | Equinox |  Vmag  Rmag | Comment
HR-0025 |  00:09:24.7  | -45:44:51.0  | 2000.0  | 3.880 3.130 | E Phe

Catalogs

DIMM Operation

• DIMM window in the bottom-right. This is the main window and contains most of the controls.
• Telescope window in the bottom-left. It shows the coordinates the telescope is pointing at and allows the user to move the telescope.
• SkyMap window above the 'telescope window' displays the current region in the sky where the telescope is pointing.
• ObjectList window in the top-left shows the current object list ('dimm.objects' or 'mass.objects)
• Message window in the top-right shows a log of system messages.

To verify the functioning of the CCD system you may press the Expsose button to take a single exposure. For a detailed explanation of all GUI controls please refer to the GUI Controls section.
Assuming all systems are working, all one has to do to start the DIMM measurements is to press the AutoDimm button. This will start the following sequence: (see cdimm.c:DimmLoopTimerFunc)

1. If any of the conditions below are false:
   • Weather OK. This is currently just a menu entry (File->Meteo) to allow a clean interrupt of the measurement loop, but could be connected to a weather-station in the future.
   • Sun below the twilight limit (cdimm.ini).
     Note: For daytime operations we need to add the sun-distance to the cost function.
   then wait some time and goto (1)
2. Open the dome
   Talk to the IP-address defined by the dome-host keyword in cdimm.ini. If dome-host is not present (or commented out) then just mark the dome as open in the File->Dome menu of the DIMM-Window.
3. Select a star from the object list. The following criteria are used for the cost function: (see objlist.c:get_best_cate)
   • Vmag difference to optmag in cdimm.ini
   • current airmass (cutoff by am-limit in cdimm.ini)
   • current azimut (cutoff by az-limit1 and az-limit2 in telescope.ini)
   • minimum zenith distance (cutoff by zd-limit in telescope.ini)
   • distance to the moon (weight depends on moon-phase)
     (todo: add distance to the sun for daytime operations)
   • number of times this objects has not been found since the last program start.
4. Move the telescope to the selected star and take an exposure.
   If there is no star (pair) of the approximate brightness (compare estimated flux from the star-magnitude in the object-list and CFZM in the ccdX.ini file with the measured flux)
   then start a spiral search pattern consisting of 49 positions (81 when using the MASS) in a 7x9 (9x9 with MASS) square (see dacq.c:do_center)
5. If there is no star (pair) of approximate brightness
   then mark this star as not found (increases cost-function) and goto (3)
6. Center the star (pair) on the CCD array.
   Only move the telescope if the stars are too close to the border because the telescope does not point very well.
7. Take a measurement sequence. The duration (typically 1 minute) can be set in the DIMM->ObsPars menu of the DIMM-Window.
   todo tell MASS if mass-port != 0
8. Reduce data and append results to the data-files:
   todo expample
   todo wait for MASS if running
9. Adjust focus:
   If the fspeed parameter in the telescope.ini file is not '0'
   then run the focus motor for some time in the direction given by the deviation in the distance of the star-pair (spread parameter in the telescope.ini file).
10. Check weather and sun alitude:
    If either the File->Meteo menu has been set to bad or the sun is above the twilight limit (cdimm.ini)
    then close the dome and goto (1)
11. Check current airmass and azimuth:
    If we need better star
    then goto (3)
    else goto (6)

GUI Controls

DIMM Window

Button: Expose

Take single exposure. The exposure time is set in the DIMM--ObsPars menu (ExpLong parameter).

Button: Measure

Start one (1) measurement sequence. The length is set in the DIMM--ObsPars menu (MeasureT parameter).

Button: AutoDIMM

Start fully automatic operations (see DimmLoop).

Button: Foc- (available with 'fspeed != 0' only)

run focus motor in negative direction until this button is pressed again.

Button: Foc+ (available with 'fspeed != 0' only)

run focus motor in positive direction until this button is pressed again.

Window: n1/n2 (reject)

Number of exposures (ST5) or scan-shifts (ST7) for the short/long exposure time. In brackets is the number of rejected exposures. The short exposure time is set in the DIMM--ObsPars menu (ExpT-T1 parameter).

Button: Seeing

Open the seeing Graph window. The window contains the last/average seeing in arcsec.

Button: Strehl

Open the strehl-ratio Graph window. The window contains the last/average strehl-ratio. It is defined as the ratio of measured peak-pixel/total-flux ratio divided by the theoretical peak-pixel/total-flux ratio.

Button: Scintillation

Open the scintillation Graph window. The window contains the last/average scintillation ratio. It is defined as the RMS of the flux divided by the average flux. (Note: This differs from the CTIO definition)

Button: dx

Open the 'dx' Graph window. The distance (in pixels) between the two images of the star. It is an excellent measure of the focus of the DIMM system.

Menu: Modules

Telescope: Open telescope control window

Skymap: Open sky map (SAO catalog)

Airmass: Open the airmass window.

ObjectList: Open object list window

Dome--Open: Manually open dome and turn on fan

Dome--Close: Manually close dome and turn off fan

Meteo--Ok: Enable AutoDIMM observations. If in 'AutoDIMM' mode the dome will open and measurements will start (when the sun is below 'twilight').

Meteo--Bad: Disable AutoDIMM observations. If in 'AutoDIMM' mode the dome will close, measurements will be stopped and telescope will put to "sleep".

Exit: Close C-DIMM program

Menu: DIMM

Auto--SelObject:

[Checked] Let C-DIMM pick the stars (default)

[Unchecked] No automatic star selection. You have to center a star before starting the 'AutoDimm' loop.

Auto--Focus:

[Checked] The focus will be automatically adjusted after each measurement (default if the 'fspeed' parameter in the telescope.ini file is not zero)

[Unchecked] no auto-focus.

ObsPars: Opens a dialog-box that allows the modification of the following parameters:

ExpLong	Exposure time [ms] used for centering and manual exposures.
Exp-T1	Short exposure time (ST5) [ms] for seeing measurements. Scan interval in ST-7 scan mode.
MeasureT	Length [seconds] of measurement loop (data acqisition).
StarRadius	Radius for object fit during data analysis.
Focus	Best star-separation in pixels. Equivalent of 'spread' [arcsec] in telescope.ini WARNING: This value is not saved between runs of the program. For permanent changes please update telescope.ini.
V-binning	Vertical binning in scan-mode (ST7).

SimPars: Opens a dialog box that allows modifying the following parameters.

Note: These value are relevant only in simulator mode.

Strehl	Simulator (input) strehl-ratio
Spread	Simulator (input) star separation
Seeing	Simulator (input) seeing
Scintillation	Simulator (input) scintillation
f-Cosmics	Frequency of (simulated) cosmic events per readout line
PointingError	RMS pointing error of the (simulated) telescope
Clounds	magnitudes of (simulated) absorption
F-Motion	Intrinsic freqency of (simulated) star motion

Menu: Display

Messages

OpenWindow: open Message window.

ShowLast: auto-scroll to last message when checked.

Graph

Data: open data-graph window (last selection)

Seeing: open seeing-graph window

Strehl: open strehl-ratio-graph window

Scint: open scintillaion-graph window

dx: open dx-graph (focus) window

FFT: open graph with fourier-transform of star-separation (ST7 debug-version only)

Scaling: Set scaling-mode of CCD data display.

Cuts: manual setting of min/max level.

MinMAx: auto-scale to min/max of data.

Median 3/3: scale (-3..+3) sigma around median (background)

Median 5/5: scale (-5..+5) sigma around median (background)

Median 3/10: scale (-3..+10) sigma around median (background)

Palette: Set color scheme for CCD data display.

Grey: greyscale color map

Rainbow: rainbow color map (blue..green..red..white)

BlackBody: black body color map (black..red..white)

Menu: Help

Help: open this website.

About: open About dialog box (author, version, etc)

Menu: Debug

Note: These options are for debugging, calibration, testing and setting up the DIMM system.

Method

Image: use 2d-image measurement loop (default for ST-5)

Scan: use 1d-scan measurement loop (default for ST-7)

Dark: take dark (shutter closed) exposure(s) and subtract it during subsequent measurements.

Take-1: take 1 dark exposure

Take-3: take 3 dark exposures and calculate the median image

Take-7: take 7 dark exposures and calculate the median image

Take-17: take 17 dark exposures and calculate the median image

Erase: erase the dark buffer

Image

Save: save current image in FITS or CELT format.

Stats: calculate image statistics (min,max,median,sigma) and print them in the Message window.

Measure: find stars in current image and print their positions (centroid) in the Message window.

Center: Run the built-in star centering algorithm

Center-2: assume star-pair (with prism)

Center-1: assume single star (no prism)

Reticle: Continously take exposures and display a cross-hair. This mode is very useful for aligning the telescope.

Off: Turn-off Reticle mode. You have to turn it off in-between switching from one magnification to another.

On/1: no magnification

On/2: 2-times magnification

On/4: 4-times magnification

CCD

Shutter/Cover: Open/Close the shutter (ST7) or cover (ST5)

Temps: query CCD temperature sensors

Park: Close shutter/cover, turn-off temperature regulation and close connection to CCD controller.

Init: Connect to CCD controller, close shutter, open cover, and turn-on temperature regulation.

Dome: This assumes an Acromag EN983 digtal controller.

Acro-Inputs: Query digital inputs and write 12-bit hex-number to the Message window.

Output-1: Set output-1 to hi/low.

Output-2: Set output-2 to hi/low.

GPS

Power: Turn GPS power on/off.

Time: Take GPS time-fix. Does not synchronize PC and telescope time.

The first groups shows the current siderial time (ST), airmass (AM) and universal time (UT).

The seconds group handles telescope coordinates:

Edit: Alpha and Delta

Display right ascension (alpha) and declination (delta) of the current telescope pointing. The Equinox listbox defineds the equinox of the coordinate display. The available settings are today, 1950, 2000.

Button: Get

Query the current position from the telescope.

Button: Send

Send the current values from the Alpha,Delta windows to the telescope and move it there.

The third group handles small telescope motions (offsets)

Edit: dx and dy

Set the size of the next offset move (arcseconds).

Button: N, NW, W, SW, S, SE, E, NE

Move the telescope by the amount given in the dx,dy edit window(s).

Menu: TimeSim

Note: These options are for software debugging and tests only.

RealTime: This is the only option available with a real telescope.

5:1: Run the internal clock 5 times faster.

15:1: Run the internal clock 15 times faster.

60:1: Run the internal clock 60 times faster.

200:1: Run the internal clock 200 times faster.

Menu: Home

StoreHome: Send 'hS' command to the telescope.

From the Meade manual: Seeks Home position and and stores the encoder values from the aligned telescope at the home position in the non-volatile memory of the scope.

AlignFromHome: Send 'hF' command to the telescope.

From the Meade manual: Seeks the Home position of the scope and sets/aligns the scope based on the encoder values stored in non-volatile memory.

Sleep: Send 'hN' command to the telescope.

From the Meade manual: Power off motors, encoders displays and lights. Scope remains in minimum power mode until a keystroke is received or a wake command is sent

WakeUp: Send 'hW' command to the telescope.

From the Meade manual: Wake up sleeping telescope

Park: Slew the telescope to the park position ('hP' command) then sleep the telescope and close the connection.

Init: Connect to the telescope and query (GPS 1) or set (GPS 0) the latitude and longitude. The software will query the telescope time if (time 1) is set in the telescope.ini file and use it in the log/data-files.

Menu: Info

Alt.Az.: Query azimuth and altitude from the telescope.

Sun/Moon: Calculate sun- and moon-altitude and moon-phase.

Skymap Window

This window displays the SAO (default) star-catalog, superimposed with the object list. The stars are represented by colored circles. Spectral types 'O','B' are blue, 'A','F' are green, 'G' is yellow, 'K' is red and 'M' is brown. Unknown spectral types are colored in black. Entries from the ObjectList are small pink circles with a blue cross and the object's name printed next to it.
In the example above the star SAO-90816 (spectral type K0, Vmag=3.7) is identical to the object 'HR-8684'.

A left mouse-click on the sky area (grey) selects the nearest star and displays its catalog number, spectral type (if available) and visual magnitude.

A right double-click selects the nearest star and moves the telescope to it.

Menu: Catalog Select the star catalog. The DIMM catalog is a bright subset of the SAO catalog.

Menu: Parameters

Mag.Limit

Auto: Auto-adjust the brightness limit depending on the size of the displayed sky area.

Set: Set the brightness limit manually.

Menu: Zoom

Increase (125%,150%,200%,400%) or decrease (25%,50%,75%) the area displayed on the map.

Button: In

Zoom in to the next level.

Button: Out

Zoom out to the next level.

Object-List Window

This window displays the current object list. It allows the user to add, modify and remove entries. The list may be sorted by various (see below) criteria.

Button: Edit

Opens a dialog-box that allows to edit the currenly selected object.

Button: Add

Opens a dialog-box for an new (emtpy) object.

Button: Remove

Removes the currently selected object.

Button: MoveTo

Moves the telescope to the selected object.

Menu: File

Load: Open a file-selector dialog and load the selected object list.

Save: Save the current object list.

Save as ...: Save the curent object list under a new name.

Exit: Close this window.

Menu: Sort

by Name: Sort the list alphabetically by name.

by Alpha: Sort the list by right ascension (alpha).

by Delta: Sort the list by declination (delta).

by Mag.: Sort the list by object brightness (V-mag).

Data Graph Window

This window displays various data collected since the last program start. The vertical 'triangle-buttons' adjust the y-scale, while the horizontal 'triangle-buttons' adjust the time-scale.
The following graphs are available:

• Seeing
• Strehl-Ratio
• Scintillation-Ratio
• dx (focus)

Message Window

The 'message-window' displays mostly information about the current procedure. The time is given as 'local time'.
In the example above the first 2 lines are printed during the centering and give the flux and strehl-ratios of the star pair. The next 2 lines are the intermediate results of the short (t=1) and the long (t=2) exposure sequence (ST5-mode) ...

Airmass Window

This window displays the current (red dot) and future (blue line) airmass at the current telescope pointing.

MASS Operation

mass-port       uuuuu       ; default=0 (no MASS)
mass-host       x.y.z.host  ; IP number of computer running 'turbina' (optional)

• use the mass.objects object list (instead of dimm.objects)
• set the appropriate HR star number (send SET OBJECT to turbina)
• initiate a MASS-background measurement after each new star selection (send RUN SCEN1 to turbina)
• initiate a MASS measurement loop during the DIMM measurement (send RUN to turbina) and wait for its termination (about 1 minute)

Output Files

Data Files

The C-DIMM software creates 3 data-files per day:
name_ddmmmyyyy_c.see
name_ddmmmyyyy_c.t12
name_ddmmmyyyy_c.wnd

name	value of the ident keyword in the cdimm.ini file (eg. 'dimm1')
dd	2 digit day-of-month (eg. '06')
mmm	3 letter abbreviation of the current month (eg. 'Jul')
yyyy	4 digit year (eg. 2006)
c	1 digit code for the CCD-type ('5' or '7')

The .see file contains the final measurements (eg. seeing); the .t12 file contains more detailed values and intermediate numbers and the .wnd file contains the current wind data.

ST-5: dimm1_06Jul2006_5.see (1 line per measurement)

Col-1        2       3    4     5    6   7     8     9     10    11   12
2006-07-06 23:01:50 4554 G_UMa 1.12 106 0.658 0.659 0.656 13694 48.8 -0.0
2006-07-06 23:02:50 4554 G_UMa 1.12 106 0.739 0.744 0.734 14390 48.8  0.0
2006-07-06 23:03:50 4554 G_UMa 1.12 106 0.593 0.595 0.590 14279 48.8  0.0

Columns (_5.see)
1. UT-Date
2. UT-Time (from PC unless 'time 1' is set in telescope.ini)
3. HR star number (from name field in the object list)
4. star name (from the comment field in the object list)
5. airmass
6. total number of exposures (short+long)
7. seeing [arcsec], (x+y)/2, corrected for zenith distance and exposure time
8. x-seeing, corrected for zenith distance and exposure time
9. y-seeing, corrected for zenith distance and exposure time
10. total flux (short exposure)
11. dx, star-separation [pixels] in 'X' (focus)
12. dy, star-separation [pixels] in 'Y' (alignment)

ST-5: dimm1_06Jul2006_5.t12 (1 line per measurement)

Col-1    2        3       4   5     6     7     8     9     10    11    12    13    14  15    16    17    18    19    20    21    22    23
4554 2006-07-06 23:01:50  53 0.629 0.629 0.629 13694 0.030 0.179 0.178 0.565 0.551  53 0.618 0.620 0.615 29454 0.012 0.121 0.122 0.561 0.552

Columns (_5.t12)
1. HR star number (from name field in the object list)
2. UT-Date
3. UT-Time (from PC unless 'time 1' is set in telescope.ini)
4. number of short exposures
5. seeing from short exposures, (x+y)/2, (zenith distance corrected)
6. X-seeing from short exposures (zenith distance corrected)
7. Y-seeing from short exposures (zenith distance corrected)
8. total (average) flux in short exposures
9. readnoise component in seeing estimate (arcsec)
10. scintillation-ratio (short exposures, left star)
11. scintillation-ratio (short exposures, right star)
12. strehl-ratio (short exposures, left star)
13. strehl-ratio (short exposures, right star)
14. number of long exposures
15. seeing from long exposures, (x+y)/2, (zenith distance corrected)
16. X-seeing from long exposures (zenith distance corrected)
17. Y-seeing from long exposures (zenith distance corrected)
18. total (average) flux in long exposures
19. readnoise component in seeing estimate (arcsec)
20. scintillation-ratio (long exposures, left star)
21. scintillation-ratio (long exposures, right star)
22. strehl-ratio (long exposures, left star)
23. strehl-ratio (long exposures, right star)

ST-7: dimm1_06Jul2006_7.see (1 line per measurement)

Col-1        2       3    4     5     6    7     8     9      10    11
2006-07-07 05:25:55 6705 G_Dra 1.09  1800 0.688 0.752 0.757  15107 54.2
2006-07-07 05:37:55 6705 G_Dra 1.08  1800 0.688 0.751 0.755  15372 54.2
2006-07-07 05:49:55 6705 G_Dra 1.07  1800 0.689 0.750 0.759  15251 54.2

Columns (_7.see)
1. UT-Date
2. UT-Time (from PC unless 'time 1' is set in telescope.ini)
3. HR star number (from name field in the object list)
4. star name (from the comment field in the object list)
5. airmass
6. total number of scanned lines
7. (mod) seeing [arcsec], corrected for zenith distance and exposure time. Uses Tokovinin's [1] method to extrapolate to '0' exposure time using the first 2 exposure time bins.
8. (ex2) seeing [arcsec], corrected for zenith distance and exposure time. Uses a 2-point exponential fit (2 shortest exposure time bins) for the exrapolation to '0' exposure time.
9. (ex6) seeing [arcsec], corrected for zenith distance and exposure time. Uses a 6-point exponential fit (all six exposure time bins) for the exrapolation to '0' exposure time.
10. total flux
11. dx, star-separation [pixels] (focus)

ST-7: dimm1_06Jul2006_7.t12 (6 lines per measurement, one for each time-bin)

Col-1    2        3       4   5    6      7     8     9     10    11    12 
6705 2006-07-07 04:37:55  5  1774 0.675  15445 0.003 0.146 0.146 0.590 0.598
6705 2006-07-07 04:37:55 10   888 0.609  30896 0.002 0.144 0.144 0.584 0.593
6705 2006-07-07 04:37:55 15   592 0.536  46359 0.001 0.143 0.143 0.578 0.588
6705 2006-07-07 04:37:55 20   445 0.470  61813 0.001 0.140 0.140 0.572 0.584
6705 2006-07-07 04:37:55 25   356 0.428  77253 0.001 0.139 0.140 0.569 0.582
6705 2006-07-07 04:37:55 30   296 0.384  92726 0.001 0.137 0.138 0.565 0.581

Columns (_7.t12)
1. HR star number (from name field in the object list)
2. UT-Date
3. UT-Time (from PC unless 'time 1' is set in telescope.ini)
4. exposure time for this time-bin [ms]
5. number of lines in this time-bin
6. seeing value from this time-bin (zenith distance corrected)
7. total (average) flux in this time-bin
8. readnoise component in seeing estimate (arcsec)
9. scintillation-ratio (left star)
10. scintillation-ratio (right star)
11. strehl-ratio (left star)
12. strehl-ratio (right star)

ST-7: dimm1_30Jun2011_7.wnd (1 line per measurement)

Col-1        2       3    4     5     6  
2011-06-30 20:35:58 20.1 182 1.093 0.701
2011-06-30 20:36:10 20.1 182 1.160 0.701
2011-06-30 20:36:22 20.2 177 1.214 0.701

Columns (_7.wnd)
1. UT-Date
2. UT-Time (from PC unless 'time 1' is set in telescope.ini)
3. wind speed [mph]
4. wind direction [degrees]
5. wind motion [pixels]
6. seeing [arcsec]

Logfile

The logfile contains useful information about all procdures. It content is mainly for testing and debugging purposes. The naming convention is the same as for the data files (eg. dimm1_06Jul2006_7.log).
At startup the C-DIMM software writes a complete description of the current setup to the logfile. Some items are self-explanatory but many are fairly cryptic. Below are examples that hopefully explain most of the entries:

ST-5:

Each logfile starts with the current epoch, the moon-phase, the name of the data files and the setup:

Jul 06 15:59:26: epoch= 2006.512
Jul 06 15:59:26: moon-phase= 0.710
Jul 06 15:59:26: c:\cdimm\Logfiles\dimm0_06Jul2006_5.see
Jul 06 15:59:26: c:\cdimm\Logfiles\dimm0_06Jul2006_5.t12
Jul 06 15:59:26: CCD: simulator, TCS: simulator

Jul 06 15:59:27: ST5, 320, 240, 0.820, 1.25, 25.00, 2.80e+007, 2.5

Jul 06 15:59:27: tpar.spread=40.00 [arcsec], spar.spread=48.78 [pix]

Jul 06 15:59:27: LX200GPS, -118.100, 34.100, 0.095, 0.150

Jul 06 15:59:27: Kx=0.195, Ky=0.117, k2=1.580e-011, ta_98=11.142
Jul 06 15:59:27: shapefactor=192, ron2=400.0, nbpix=49

Jul 06 15:59:27: strehl_th=0.229, diff_lim=2.261, lambda_ccd=700

Jul 06 16:01:20: ccd_init()
Jul 06 16:01:20: tele_init()
Jul 06 16:01:33: dome open

Jul 06 16:01:34: 38: az=20, am=1.0, zd=7, dm=0.5, md=97, re=0, cost=1.33
Jul 06 16:01:34: 40: az=44, am=1.0, zd=10, dm=0.5, md=91, re=0, cost=1.74
Jul 06 16:01:34: 41: az=129, am=1.1, zd=14, dm=0.1, md=74, re=0, cost=2.15
Jul 06 16:01:34: 43: az=124, am=1.2, zd=20, dm=-0.4, md=64, re=0, cost=2.07
Jul 06 16:01:34: 44: az=36, am=1.1, zd=20, dm=-0.1, md=91, re=0, cost=0.59
Jul 06 16:01:34: 46: az=39, am=1.2, zd=22, dm=-0.7, md=86, re=0, cost=0.66
Jul 06 16:01:34: 47: az=110, am=1.4, zd=23, dm=0.3, md=47, re=0, cost=2.04
Jul 06 16:01:34: 48: az=52, am=1.4, zd=15, dm=-0.6, md=75, re=0, cost=0.87

Jul 06 16:01:34: #44-HR-4554: az=36, am=1.1, zd=20, dm=-0.1, md=91
Jul 06 16:01:38: new object: HR-4554 - G UMa
Jul 06 16:01:38: new min_flux=486194

Jul 06 16:01:38: do_cntr(): flux1= 155479.0, strehl1= 0.55 (OK)
Jul 06 16:01:38: do_cntr(): flux2= 155199.0, strehl2= 0.56 (OK)
Jul 06 16:01:40: centering done, have_dimmstar=1

Jul 06 16:01:40: do_cntr(): flux1= 136687.0, strehl1= 0.57 (OK)
Jul 06 16:01:40: do_cntr(): flux2= 137446.0, strehl2= 0.57 (OK)

The individual results for both expsoure times, focus (dx), alignment (dy), some intermediate numbers and the finals results:

Jul 06 16:01:50: t=1: eps_x=0.674, eps_y=0.674 eps_r=0.0326
Jul 06 16:01:50: t=2: eps_x=0.664, eps_y=0.659 eps_r=0.0130
Jul 06 16:01:50: dx= 48.77 dy= -0.01
Jul 06 16:01:50: eps_x0=0.706, eps_y0=0.703, zcorr=0.933
Jul 06 16:01:50: C1= 1.033 (1.014), C2= 1.06, gain= 0.250
Jul 06 16:01:50: seeing=0.66, strehl=0.56, dx=48.77, scint=0.261

ST-7:

Each logfile starts with the current epoch, the moon-phase, the name of the data files and the setup:

Jul 06 11:36:04: epoch= 2006.512
Jul 06 11:36:04: moon-phase= 0.696
Jul 06 11:36:04: c:\cdimm\Logfiles\dimm0_06Jul2006_7.see
Jul 06 11:36:04: c:\cdimm\Logfiles\dimm0_06Jul2006_7.t12
Jul 06 11:36:04: CCD: simulator, TCS: simulator

Jul 06 11:36:04: ST7, 765, 510, 0.738, 2.30, 15.00, 2.80e+007, 2.5

Jul 06 11:36:04: tpar.spread=40.00 [arcsec], spar.spread=54.20 [pix]

Jul 06 11:36:04: LX200GPS, -118.100, 34.100, 0.095, 0.150

Jul 06 11:36:04: Kx=0.195, Ky=0.117, k2=1.280e-011, ta_98=11.142
Jul 06 11:36:04: shapefactor=60, ron2=42.5, nbpix=9

Jul 06 11:36:04: strehl_th=0.232, diff_lim=2.243, lambda_ccd=625

Jul 06 11:36:04: tele_init()
Jul 06 11:36:04: ccd_init()
Jul 06 21:19:55: dome open

Jul 06 21:19:56: 54: az=167, am=1.0, zd=7, dm=-0.3, md=51, re=0, cost=2.79
Jul 06 21:19:56: 55: az=171, am=1.1, zd=28, dm=0.1, md=31, re=0, cost=2.86
Jul 06 21:19:56: 57: az=128, am=1.1, zd=13, dm=0.3, md=48, re=0, cost=2.35
Jul 06 21:19:56: 60: az=104, am=1.1, zd=9, dm=0.6, md=56, re=0, cost=3.47
Jul 06 21:19:56: 62: az=41, am=1.1, zd=18, dm=0.3, md=82, re=0, cost=0.90
Jul 06 21:19:56: 64: az=125, am=1.4, zd=30, dm=0.3, md=45, re=0, cost=2.31
Jul 06 21:19:56: 66: az=46, am=1.2, zd=17, dm=-0.3, md=84, re=0, cost=0.76

Jul 06 21:19:56: #66-HR-6705: az=46, am=1.2, zd=17, dm=-0.3, md=84
Jul 06 21:23:56: new object: HR-6705 - G Dra
Jul 06 21:23:56: new min_flux=584534

Jul 06 21:24:56: do_cntr(): flux1= 140765.0, strehl1= 0.53 (OK)
Jul 06 21:24:56: do_cntr(): flux2= 139987.0, strehl2= 0.50 (OK)
Jul 06 21:25:56: centering done, have_dimmstar=1

Jul 06 21:26:56: do_cntr(): flux1= 142508.0, strehl1= 0.53 (OK)
Jul 06 21:26:56: do_cntr(): flux2= 142095.0, strehl2= 0.51 (OK)
Jul 06 21:27:55: cntr_y=252.7
Jul 06 21:27:55: vbin=10

Some results of the FourierTransform (may be safely ignored):

Jul 06 21:37:55: cp=15.8 (512)
Jul 06 21:37:55: local peak at  2.0 (0.325)
Jul 06 21:37:55: local peak at  5.5 (0.373)
Jul 06 21:37:55: local peak at  7.8 (0.605)
Jul 06 21:37:55: local peak at 27.5 (0.533)
Jul 06 21:37:55: local peak at 33.8 (0.633)
Jul 06 21:37:55: local peak at 47.7 (0.246)
Jul 06 21:37:55: np=6 (256), cf=20.7

Jul 06 21:37:55: t=1: eps_x=0.734, eps_r=0.0028
Jul 06 21:37:55: t=2: eps_x=0.662, eps_r=0.0018
Jul 06 21:37:55: t=3: eps_x=0.583, eps_r=0.0014
Jul 06 21:37:55: t=4: eps_x=0.511, eps_r=0.0012
Jul 06 21:37:55: t=5: eps_x=0.466, eps_r=0.0011
Jul 06 21:37:55: t=6: eps_x=0.418, eps_r=0.0010

Jul 06 21:37:55: 1-dim FWHM=2.55 (0.013)
Jul 06 21:37:55: C1= 1.050 (1.081), C2= 1.09, gain= 0.250
Jul 06 21:37:55: eps_mod=0.736, eps_ex2=0.815, eps_ex6=0.823, zcorr=0.920
Jul 06 21:37:55: seeing= 0.677, strehl= 0.59, dx= 54.20, scint= 0.147
Jul 06 21:37:56: auto-focus= 54.20 (+0.000)

References

• [1] From Differential Image Motion to Seeing, Tokovinin A., 2002, PASP, 114, 1156 (.pdf)
• [2] CELT code