Using MAT - the Mount Alignment Telescopes

MAT was removed from the Telescope in Oct 2015, and replaced by LAT -- These instructions are obsolete.

The MAT gets used if there are horrible problems with the telescope pointing, or as an alternative way to monitor clouds crossing the target field.

Starting the MAT interface

• Launch a DS9 display window with ds9 &
• Launch the MAT GUI with MATGUI
  Please note that only one version of the MATGUI should be run at a time!
  Make sure no one else is using it, or it could lock up the server.

Pointing

On 16-Nov-2011, the MAT pointing relative to DX LBTI was:

• wide field x=356 y=348
• narrow x=241 y=322

MAT documentation

• MAT User Guide (483s495)
• MAT Troubleshooting

Other

MATGUI lives at /lbt/mat/current/bin/MATGUI

Sample MAT batch file:

#example file for command specification batch file
# this file should have the extension .cbf for the GUI to find it
#
#Format: one command is a tab-separated sequence of  
#	- telescope id (0 = wide-field or 1 = narrow-field)
#	- shutter position (0 = CLOSED, 1 = OPEN)
#	- exposure time (in msecs, min = 0, max = 86400000 = 24 hours)
#	- focuser position (0 ... 2000)
#	- magnitude (<= +40)
#	- target's filter (one of the following strings: pass_all, UV_block, Red_pass, Green_pass, Blue_pass, empty5, empty6, empty7)
#	- color (300 ... 20000)
#	- preset (0 = DISABLED, 1 = ENABLED)
#	- target's RA as a double (radians: b/w 0 and 2*pi), or string hh:mm:ss.sss (sexagesimal: b/w 00:00:00.000 and 23:59:59.999)
#	- target's DEC as a double (radians: b/w -pi/2 and pi/2), or string dd:mm:ss.sss (sexagesimal: b/w -90:00:00.000 and 90:00:00.000)
#	- target's equinox as year in FK4 mean, FK5 mean, or APPARENT place (e.g., B1950.00, J2004, APP)
#TEL	SHUT	EXP	FOC	MAG	FIL		CLR	PRESET	RA		DEC	EQX
1       0       0       0       13      pass_all        1234    0       0               +1.2345         B2000
1       0       300     0       13      Green_pass      1234    0       3.14            -90:00:00.000   B2000
1       1       300     0       13      Red_pass        1234    0       23:59:59.999    90:00:00.000    B2000

MAT puts the following keywords into the FITS header:

    FITS keyword          DD entry

    ELT0    =          ELDemandTimeStamp                                                 
    ELA0    =          ELDemandPosition                                    
    ELA1    =          ELDemandVelocity                                                  
    ELA2    =          ELDemandAcceleration                                                   
    ELT1    =          ELDemandTimeStamp                                                    
    AZT0    =          AZDemandTimeStamp                                                  
    AZA0    =          AZDemandPosition                                                  
    AZA1    =          AZDemandVelocity                                                  
    AZA2    =          AZDemandAcceleration                                                 
    AZT1    =          AZDemandTimeStamp                                                  
    ST      =          LST                                                 
    UTDATE  =          UTC                                                 
    RA      =          L_PresetTargetRAHMS                                                   
    DEC     =          L_PresetTargetDECDMS                                                   
    RAACHV  =          L_AchievedRAHMS                                                   
    DECACHV =          L_AchievedDECDMS                                                   
    PARANGLE=          ParAngle 

-- JohnHill - 14 Nov 2011